- 17 Oct, 2007 40 commits
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Jesper Juhl authored
Yes, some of this will likely be replaced in later patches, but I do not see anyone else coming out of the woodwork with any patches for this driver, so I'll ignore comments about churn. I want to get this driver cleaned up, and if I'm going to do so I want to start with this basic style cleanup to reduce the reading pain a bit. Signed-off-by:
Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Oleg Nesterov authored
Change migration_call(CPU_DEAD) to use direct spin_lock_irq() instead of task_rq_lock(rq->idle), rq->idle can't change its task_rq(). This makes the code a bit more symmetrical with migrate_dead_tasks()'s path which uses spin_lock_irq/spin_unlock_irq. Signed-off-by:
Oleg Nesterov <oleg@tv-sign.ru> Cc: Cliff Wickman <cpw@sgi.com> Cc: Gautham R Shenoy <ego@in.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Srivatsa Vaddagiri <vatsa@in.ibm.com> Cc: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by:
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Oleg Nesterov authored
Currently move_task_off_dead_cpu() is called under write_lock_irq(tasklist). This means it can't use task_lock() which is needed to improve migrating to take task's ->cpuset into account. Change the code to call move_task_off_dead_cpu() with irqs enabled, and change migrate_live_tasks() to use read_lock(tasklist). This all is a preparation for the futher changes proposed by Cliff Wickman, see http://marc.info/?t=117327786100003Signed-off-by:
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NeilBrown authored
Whenever a read error is found, we should attempt to overwrite with correct data to 'fix' it. However when do a 'check' pass (which compares data blocks that are successfully read, but doesn't normally overwrite) we don't do that. We should. Signed-off-by:
Neil Brown <neilb@suse.de> Signed-off-by:
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Iustin Pop authored
The 'degraded' attribute is useful to quickly determine if the array is degraded, instead of parsing 'mdadm -D' output or relying on the other techniques (number of working devices against number of defined devices, etc.). The md code already keeps track of this attribute, so it's useful to export it. Signed-off-by:
Iustin Pop <iusty@k1024.org> Signed-off-by:
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NeilBrown authored
When an array is started read-only, MD_RECOVERY_NEEDED can be set but no recovery will be running. This causes 'sync_action' to report the wrong value. We could remove the test for MD_RECOVERY_NEEDED, but doing so would leave a small gap after requesting a sync action, where 'sync_action' would still report the old value. So make sure that for a read-only array, 'sync_action' always returns 'idle'. Signed-off-by:
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NeilBrown authored
http://bugzilla.kernel.org/show_bug.cgi?id=3277 There is a seq_printf here that isn't being passed a 'seq'. Howeve as the code is inside #ifdef MD_DEBUG, nobody noticed. Also remove some extra spaces. Signed-off-by:
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Adrian Bunk authored
bitmap_active() no longer exists and BITMAP_ACTIVE is no longer used. Signed-off-by:
Adrian Bunk <bunk@kernel.org> Cc: Neil Brown <neilb@suse.de> Cc: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by:
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Michael J. Evans authored
In current release kernels the md module (Software RAID) uses a static array (dev_t[128]) to store partition/device info temporarily for autostart. I discovered this (and that the devices are added as disks/partitions are discovered at boot) while I was debugging why only one of my MD arrays would come up whole, while all the others were short a disk. I eventually discovered that it was enumerating through all of 9 of my 11 hds (2 had only 4 partitions apiece) while the other 9 have 15 partitions (I wanted 64 per drive...). The last partition of the 8th drive in my 9 drive raid 5 sets wasn't added, thus making the final md array short both a parity and data disk, and it was started later, elsewhere. This patch replaces that static array with a list. [akpm@linux-foundation.org: removed unused var] Signed-off-by:
Michael J. Evans <mjevans1983@gmail.com> Cc: Neil Brown <neilb@suse.de> Signed-off-by:
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Martin J. Bligh authored
Val's cross-port of the ext3 reservations code into ext2. [mbligh@mbligh.org: Small type error for printk [akpm@linux-foundation.org: fix types, sync with ext3] [mbligh@mbligh.org: Bring ext2 reservations code in line with latest ext3] [akpm@linux-foundation.org: kill noisy printk] [akpm@linux-foundation.org: remember to dirty the gdp's block] [akpm@linux-foundation.org: cross-port the missed 5dea5176] [akpm@linux-foundation.org: cross-port e6022603] [akpm@linux-foundation.org: Port the omitted 08fb306f] [akpm@linux-foundation.org: Backport the missed 20acaa18] [akpm@linux-foundation.org: fixes] [cmm@us.ibm.com: fix reservation extension] [bunk@stusta.de: make ext2_get_blocks() static] [hugh@veritas.com: fix hang] [hugh@veritas.com: ext2_new_blocks should reset the reservation window size] [hugh@veritas.com: ext2 balloc: fix off-by-one against rsv_end] [hugh@veritas.com: grp_goal 0 is a genuine goal (unlike -1), so ext2_try_to_allocate_with_rsv should treat it as such] [hugh@veritas.com: rbtree usage cleanup] [pbadari@us.ibm.com: Fix for ext2 reservation] [bunk@kernel.org: remove fs/ext2/balloc.c:reserve_blocks()] [hugh@veritas.com: ext2 balloc: use io_error label] Cc: "Martin J. Bligh" <mbligh@mbligh.org> Cc: Valerie Henson <val_henson@linux.intel.com> Cc: Mingming Cao <cmm@us.ibm.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
Hugh Dickins <hugh@veritas.com> Signed-off-by:
Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by:
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Fengguang Wu authored
We don't want to introduce pointless delays in throttle_vm_writeout() when the writeback limits are not yet exceeded, do we? Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: Pete Zaitcev <zaitcev@redhat.com> Cc: Greg KH <greg@kroah.com> Reviewed-by:
Rik van Riel <riel@redhat.com> Signed-off-by:
Fengguang Wu <wfg@mail.ustc.edu.cn> Signed-off-by:
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Joern Engel authored
I_LOCK was used for several unrelated purposes, which caused deadlock situations in certain filesystems as a side effect. One of the purposes now uses the new I_SYNC bit. Also document the various bits and change their order from historical to logical. [bunk@stusta.de: make fs/inode.c:wake_up_inode() static] Signed-off-by:
Joern Engel <joern@wohnheim.fh-wedel.de> Cc: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Cc: David Chinner <dgc@sgi.com> Cc: Anton Altaparmakov <aia21@cam.ac.uk> Cc: Al Viro <viro@ftp.linux.org.uk> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by:
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Fengguang Wu authored
After making dirty a 100M file, the normal behavior is to start the writeback for all data after 30s delays. But sometimes the following happens instead: - after 30s: ~4M - after 5s: ~4M - after 5s: all remaining 92M Some analyze shows that the internal io dispatch queues goes like this: s_io s_more_io ------------------------- 1) 100M,1K 0 2) 1K 96M 3) 0 96M 1) initial state with a 100M file and a 1K file 2) 4M written, nr_to_write <= 0, so write more 3) 1K written, nr_to_write > 0, no more writes(BUG) nr_to_write > 0 in (3) fools the upper layer to think that data have all been written out. The big dirty file is actually still sitting in s_more_io. We cannot simply splice s_more_io back to s_io as soon as s_io becomes empty, and let the loop in generic_sync_sb_inodes() continue: this may starve newly expired inodes in s_dirty. It is also not an option to draw inodes from both s_more_io and s_dirty, an let the loop go on: this might lead to live locks, and might also starve other superblocks in sync time(well kupdate may still starve some superblocks, that's another bug). We have to return when a full scan of s_io completes. So nr_to_write > 0 does not necessarily mean that "all data are written". This patch introduces a flag writeback_control.more_io to indicate this situation. With it the big dirty file no longer has to wait for the next kupdate invocation 5s later. Cc: David Chinner <dgc@sgi.com> Cc: Ken Chen <kenchen@google.com> Signed-off-by:
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Fengguang Wu authored
Miklos Szeredi <miklos@szeredi.hu> and me identified a writeback bug: > The following strange behavior can be observed: > > 1. large file is written > 2. after 30 seconds, nr_dirty goes down by 1024 > 3. then for some time (< 30 sec) nothing happens (disk idle) > 4. then nr_dirty again goes down by 1024 > 5. repeat from 3. until whole file is written > > So basically a 4Mbyte chunk of the file is written every 30 seconds. > I'm quite sure this is not the intended behavior. It can be produced by the following test scheme: # cat bin/test-writeback.sh grep nr_dirty /proc/vmstat echo 1 > /proc/sys/fs/inode_debug dd if=/dev/zero of=/var/x bs=1K count=204800& while true; do grep nr_dirty /proc/vmstat; sleep 1; done # bin/test-writeback.sh nr_dirty 19207 nr_dirty 19207 nr_dirty 30924 204800+0 records in 204800+0 records out 209715200 bytes (210 MB) copied, 1.58363 seconds, 132 MB/s nr_dirty 47150 nr_dirty 47141 nr_dirty 47142 nr_dirty 47142 nr_dirty 47142 nr_dirty 47142 nr_dirty 47205 nr_dirty 47214 nr_dirty 47214 nr_dirty 47214 nr_dirty 47214 nr_dirty 47214 nr_dirty 47215 nr_dirty 47216 nr_dirty 47216 nr_dirty 47216 nr_dirty 47154 nr_dirty 47143 nr_dirty 47143 nr_dirty 47143 nr_dirty 47143 nr_dirty 47143 nr_dirty 47142 nr_dirty 47142 nr_dirty 47142 nr_dirty 47142 nr_dirty 47134 nr_dirty 47134 nr_dirty 47135 nr_dirty 47135 nr_dirty 47135 nr_dirty 46097 <== -1038 nr_dirty 46098 nr_dirty 46098 nr_dirty 46098 [...] nr_dirty 46091 nr_dirty 46092 nr_dirty 46092 nr_dirty 45069 <== -1023 nr_dirty 45056 nr_dirty 45056 nr_dirty 45056 [...] nr_dirty 37822 nr_dirty 36799 <== -1023 [...] nr_dirty 36781 nr_dirty 35758 <== -1023 [...] nr_dirty 34708 nr_dirty 33672 <== -1024 [...] nr_dirty 33692 nr_dirty 32669 <== -1023 % ls -li /var/x 847824 -rw-r--r-- 1 root root 200M 2007-08-12 04:12 /var/x % dmesg|grep 847824 # generated by a debug printk [ 529.263184] redirtied inode 847824 line 548 [ 564.250872] redirtied inode 847824 line 548 [ 594.272797] redirtied inode 847824 line 548 [ 629.231330] redirtied inode 847824 line 548 [ 659.224674] redirtied inode 847824 line 548 [ 689.219890] redirtied inode 847824 line 548 [ 724.226655] redirtied inode 847824 line 548 [ 759.198568] redirtied inode 847824 line 548 # line 548 in fs/fs-writeback.c: 543 if (wbc->pages_skipped != pages_skipped) { 544 /* 545 * writeback is not making progress due to locked 546 * buffers. Skip this inode for now. 547 */ 548 redirty_tail(inode); 549 } More debug efforts show that __block_write_full_page() never has the chance to call submit_bh() for that big dirty file: the buffer head is *clean*. So basicly no page io is issued by __block_write_full_page(), hence pages_skipped goes up. Also the comment in generic_sync_sb_inodes(): 544 /* 545 * writeback is not making progress due to locked 546 * buffers. Skip this inode for now. 547 */ and the comment in __block_write_full_page(): 1713 /* 1714 * The page was marked dirty, but the buffers were 1715 * clean. Someone wrote them back by hand with 1716 * ll_rw_block/submit_bh. A rare case. 1717 */ do not quite agree with each other. The page writeback should be skipped for 'locked buffer', but here it is 'clean buffer'! This patch fixes this bug. Though I'm not sure why __block_write_full_page() is called only to do nothing and who actually issued the writeback for us. This is the two possible new behaviors after the patch: 1) pretty nice: wait 30s and write ALL:) 2) not so good: - during the dd: ~16M - after 30s: ~4M - after 5s: ~4M - after 5s: ~176M The next patch will fix case (2). Cc: David Chinner <dgc@sgi.com> Cc: Ken Chen <kenchen@google.com> Signed-off-by:David Chinner <dgc@sgi.com> Signed-off-by:
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Fengguang Wu authored
NTFS's if-condition on dirty inodes is not complete. Fix it with sb_has_dirty_inodes(). Cc: Anton Altaparmakov <aia21@cantab.net> Cc: Ken Chen <kenchen@google.com> Signed-off-by:
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Fengguang Wu authored
Streamline the management of dirty inode lists and fix time ordering bugs. The writeback logic used to move not-yet-expired dirty inodes from s_dirty to s_io, *only to* move them back. The move-inodes-back-and-forth thing is a mess, which is eliminated by this patch. The new scheme is: - s_dirty acts as a time ordered io delaying queue; - s_io/s_more_io together acts as an io dispatching queue. On kupdate writeback, we pull some inodes from s_dirty to s_io at the start of every full scan of s_io. Otherwise (i.e. for sync/throttle/background writeback), we always pull from s_dirty on each run (a partial scan). Note that the line list_splice_init(&sb->s_more_io, &sb->s_io); is moved to queue_io() to leave s_io empty. Otherwise a big dirtied file will sit in s_io for a long time, preventing new expired inodes to get in. Cc: Ken Chen <kenchen@google.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Ken Chen authored
Current -mm tree has bucketful of bug fixes in periodic writeback path. However, we still hit a glitch where dirty pages on a given inode aren't completely flushed to the disk, and system will accumulate large amount of dirty pages beyond what dirty_expire_interval is designed for. The problem is __sync_single_inode() will move an inode to sb->s_dirty list even when there are more pending dirty pages on that inode. If there is another inode with a small number of dirty pages, we hit a case where the loop iteration in wb_kupdate() terminates prematurely because wbc.nr_to_write > 0. Thus leaving the inode that has large amount of dirty pages behind and it has to wait for another dirty_writeback_interval before we flush it again. We effectively only write out MAX_WRITEBACK_PAGES every dirty_writeback_interval. If the rate of dirtying is sufficiently high, the system will start accumulate a large number of dirty pages. So fix it by having another sb->s_more_io list on which to park the inode while we iterate through sb->s_io and to allow each dirty inode which resides on that sb to have an equal chance of flushing some amount of dirty pages. Signed-off-by:
Ken Chen <kenchen@google.com> Signed-off-by:
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Andrew Morton authored
This one fixes four bugs. There are a few situation in there where writeback decides it is going to skip over a blockdev inode on the kernel-internal blockdev superblock. It presently does this by moving the blockdev inode onto the tail of the blockdev superblock's s_dirty. But a) this screws up s_dirty's reverse-time-orderedness and b) refiling the blockdev for writeback in another 30 second is rude. We should try again sooner than that. Fix all this up by using redirty_head(): move the blockdev inode onto the head of the blockdev superblock's s_dirty list for prompt writeback. Cc: Mike Waychison <mikew@google.com> Signed-off-by:
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Andrew Morton authored
Recycling the previous changelog: When the writeback function is operating in writeback-for-flushing mode (as opposed to writeback-for-integrity) and it encounters an I_LOCKed inode, it will skip writing that inode. This is done for throughput and latency: move on to another inode rather than blocking for this one. Writeback skips this inode by moving it off s_io and onto s_dirty, so that writeback can proceed with the other inodes on s_io. However that inode movement can corrupt s_dirty's reverse-time-orderedness. Fix that by using the new redirty_tail(), which will update the refiled inode's dirtied_when field. Note: the behaviour in here is a bit rude: if kupdate happens to come across a locked inode then it will defer writeback of that inode for another 30 seconds. We'll address that in the next patch. Address that here. What we do is to move the skipped inode to the _head_ of s_dirty, immediately eligible for writeout again. Instead of deferring that writeout for another 30 seconds. One would think that this might cause a livelock: we keep on trying to write the same locked inode. But it won't because: a) if that was the case, it would _already_ be happening on the balance_dirty_pages codepath. Because balance_dirty_pages() doesn't care about inode timestamps. b) if we skipped this inode then we won't have done any writeback. The higher-level writeback paths will see that wbc.nr_to_write didn't change and they'll then back off and take a nap. Cc: Mike Waychison <mikew@google.com> Signed-off-by:
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Andrew Morton authored
When the writeback function is operating in writeback-for-flushing mode (as opposed to writeback-for-integrity) and it encounters an I_LOCKed inode, it will skip writing that inode. This is done for throughput and latency: move on to another inode rather than blocking for this one. Writeback skips this inode by moving it off s_io and onto s_dirty, so that writeback can proceed with the other inodes on s_io. However that inode movement can corrupt s_dirty's reverse-time-orderedness. Fix that by using the new redirty_tail(), which will update the refiled inode's dirtied_when field. Note: the behaviour in here is a bit rude: if kupdate happens to come across a locked inode then it will defer writeback of that inode for another 30 seconds. We'll address that in the next patch. Cc: Mike Waychison <mikew@google.com> Signed-off-by:
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Andrew Morton authored
There's a comment in there which claims that the inode is left on s_io if nfs chickened out of writing some data. But that's not been true for three years. 9290280ced13c85689adeffa587e9a53bd3a5873 fixed a livelock by moving these inodes back onto s_dirty. Fix the comment. In the second leg of the `if', use redirty_tail() rather than open-coding it. Add weaselly comment indicating lack of confidence in the code and lack of the fortitude which would be needed to fiddle with it. Cc: Mike Waychison <mikew@google.com> Signed-off-by:
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Andrew Morton authored
When the kupdate function has tried to write back an expired inode it will then check to see whether some of the inode's pages are still dirty. This can happen when the filesystem decided to not write a page for some reason. But it does _not_ occur due to redirtyings: a redirtying will set I_DIRTY_PAGES. What we need to do here is to set I_DIRTY_PAGES to reflect reality and to then put the inode onto the _head_ of s_dirty for consideration on the next kupdate pass, in five seconds time. Problem is, the code failed to modify the inode's timestamp when pushing the inode onto thehead of s_dirty. The patch: If there are no other inodes on s_dirty then we leave the inode's timestamp alone: it is already expired. If there _are_ other inodes on s_dirty then we arrange for this inode to get the same timestamp as the inode which is at the head of s_dirty, thus preserving the s_dirty ordering. But we only need to do this if this inode purports to have been dirtied before the one at head-of-list. Cc: Mike Waychison <mikew@google.com> Signed-off-by:
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Andrew Morton authored
While writeback is working against a dirty inode it does a check after trying to write some of the inode's pages: "did the lower layers skip some of the inode's dirty pages because they were locked (or under writeback, or whatever)" If this turns out to be true, we must move the inode back onto s_dirty and redirty it. The reason for doing this is that fsync() and friends only check the s_dirty list, and those functions want to know about those pages which were locked, so they can be waited upon and, if necessary, rewritten. Problem is, that redirtying was putting the inode onto the tail of s_dirty without updating its timestamp. This causes a violation of s_dirty ordering. Fix this by updating inode->dirtied_when when moving the inode onto s_dirty. But the code is still a bit buggy? If the inode was _already_ dirty then we don't need to move it at all. Oh well, hopefully it doesn't matter too much, as that was a redirtying, which was very recent anwyay. Cc: Mike Waychison <mikew@google.com> Signed-off-by:
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Andrew Morton authored
For reasons which escape me, inodes which are dirty against a ram-backed filesystem are managed in the same way as inodes which are backed by real devices. Probably we could optimise things here. But given that we skip the entire supeblock as son as we hit the first dirty inode, there's not a lot to be gained. And the code does need to handle one particular non-backed superblock: the kernel's fake internal superblock which holds all the blockdevs. Still. At present when the code encounters an inode which is dirty against a memory-backed filesystem it will skip that inode by refiling it back onto s_dirty. But it fails to update the inode's timestamp when doing so which at least makes the debugging code upset. Fix. Cc: Mike Waychison <mikew@google.com> Signed-off-by:
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Andrew Morton authored
When writeback has finished writing back an inode it looks to see if that inode is still dirty. If it is, that means that a process redirtied the inode while its writeback was in progress. What we need to do here is to refile the redirtied inode onto the s_dirty list. But we're doing that wrongly: it could be that this inode was redirtied _before_ the last inode on s_dirty. We're blindly appending this inode to the list, after an inode which might be less-recently-dirtied, thus violating the list's ordering. So we must either insertion-sort this inode into the correct place, or we must update this inode's dirtied_when field when appending it to the reverse-sorted s_dirty list, to preserve the reverse-time-ordering. This patch does the latter: if this inode was dirtied less recently than the tail inode then copy the tail inode's timestamp into this inode. This means that in rare circumstances, some inodes will be writen back later than they should have been. But the time slip will be small. Cc: Mike Waychison <mikew@google.com> Signed-off-by:
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Jeff Garzik authored
Fix bug flagged by a variable-used-uninitialized warning. [akpm@linux-foundation.org: coding-style] Signed-off-by:
Jeff Garzik <jgarzik@redhat.com> Signed-off-by:
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Michael Kerrisk authored
The email address that I use for man-pages maintenance has changed as of now. This patch changes the address in Documentation/HOWTO and MAINTAINERS. Signed-off-by:
Michael Kerrisk <mtk.manpages@googlemail.com> Signed-off-by:
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Randy Dunlap authored
Update dontdiff, based on .gitignore patches from Pete Zaitcev and Adrian Bunk. Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Cc: Pete Zaitcev <zaitcev@redhat.com> Cc: Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Edward Shishkin authored
When mounting a file system with wrong journal params do not try to repair them, suggest fsck instead. Signed-off-by:
Edward Shishkin <edward@namesys.com> Cc: Jeff Mahoney <jeffm@suse.com> Cc: Chris Mason <chris.mason@oracle.com> Signed-off-by:
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Pavel Machek authored
Remove NULL initializers and clean whitespace a bit. Signed-off-by:
Pavel Machek <pavel@suse.cz> Signed-off-by:
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Ingo Molnar authored
printk: add the KERN_CONT annotation (which is empty string but via which checkpatch.pl can notice that the lacking KERN_ level is fine). This useful for multiple calls of hand-crafted printk output done by early debug code or similar. Signed-off-by:
Ingo Molnar <mingo@elte.hu> Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by:
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Eric Sandeen authored
When resizing online, setup_new_group_blocks attempts to reserve a potentially very large transaction, depending on the current filesystem geometry. For some journal sizes, there may not be enough room for this transaction, and the online resize will fail. The patch below resizes & restarts the transaction as necessary while setting up the new group, and should work with even the smallest journal. Tested with something like: [root@newbox ~]# dd if=/dev/zero of=fsfile bs=1024 count=32768 [root@newbox ~]# mkfs.ext3 -b 1024 fsfile 16384 [root@newbox ~]# mount -o loop fsfile mnt/ [root@newbox ~]# resize2fs /dev/loop0 resize2fs 1.40.2 (12-Jul-2007) Filesystem at /dev/loop0 is mounted on /root/mnt; on-line resizing required old desc_blocks = 1, new_desc_blocks = 1 Performing an on-line resize of /dev/loop0 to 32768 (1k) blocks. resize2fs: No space left on device While trying to add group #2 [root@newbox ~]# dmesg | tail -n 1 JBD: resize2fs wants too many credits (258 > 256) [root@newbox ~]# With the below change, it works. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by:
Eric Sandeen <sandeen@redhat.com> Acked-by:
Andreas Dilger <adilger@clusterfs.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by:
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Akinobu Mita authored
load_module() returns zero when mod_sysfs_init() fails, then the module loading will succeed accidentally. This patch makes load_module() return error correctly in that case. Acked-by:
Greg Kroah-Hartman <gregkh@suse.de> Acked-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by:
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Ulrich Drepper authored
One more small change to extend the availability of creation of file descriptors with FD_CLOEXEC set. Adding a new command to fcntl() requires no new system call and the overall impact on code size if minimal. If this patch gets accepted we will also add this change to the next revision of the POSIX spec. To test the patch, use the following little program. Adjust the value of F_DUPFD_CLOEXEC appropriately. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #include <errno.h> #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #ifndef F_DUPFD_CLOEXEC # define F_DUPFD_CLOEXEC 12 #endif int main (int argc, char *argv[]) { if (argc > 1) { if (fcntl (3, F_GETFD) == 0) { puts ("descriptor not closed"); exit (1); } if (errno != EBADF) { puts ("error not EBADF"); exit (1); } exit (0); } int fd = fcntl (STDOUT_FILENO, F_DUPFD_CLOEXEC, 0); if (fd == -1 && errno == EINVAL) { puts ("F_DUPFD_CLOEXEC not supported"); return 0; } if (fd != 3) { puts ("program called with descriptors other than 0,1,2"); return 1; } execl ("/proc/self/exe", "/proc/self/exe", "1", NULL); puts ("execl failed"); return 1; } ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by:Ulrich Drepper <drepper@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Cc: <linux-arch@vger.kernel.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Alexey Dobriyan authored
There is nice 2 byte hole after struct task_struct::ioprio field into which we can put two 1-byte fields: ->fpu_counter and ->oomkilladj. Signed-off-by:
Alexey Dobriyan <adobriyan@sw.ru> Acked-by:
Arjan van de Ven <arjan@infradead.org> Signed-off-by:
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Roel Kluin authored
Replace some SPIN_LOCK_UNLOCKED with DEFINE_SPINLOCK Signed-off-by:
Roel Kluin <12o3l@tiscali.nl> Acked-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Franck Bui-Huu authored
Currently arch_align_stack() is used by fs/binfmt_elf.c to randomize stack pointer inside a page. But this happens only if ELF_PLATFORM symbol is defined. ELF_PLATFORM is normally set if the architecture wants ld.so to load implementation specific libraries for optimization. And currently a lot of architectures just yield this symbol to NULL. This is the case for MIPS architecture where ELF_PLATFORM is NULL but arch_align_stack() has been redefined to do stack inside page randomization. So in this case no randomization is actually done. This patch breaks this dependency which seems to be useless and allows platforms such MIPS to do the randomization. Signed-off-by:
Franck Bui-Huu <fbuihuu@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by:
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Davide Libenzi authored
For Michael Kerrisk request, the following patch renames signalfd_siginfo fields in order to keep them consistent with the siginfo_t ones. Signed-off-by:
Davide Libenzi <davidel@xmailserver.org> Cc: Michael Kerrisk <mtk-manpages@gmx.net> Signed-off-by:
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Eric Sandeen authored
CONFIG_EXT3_INDEX is not an exposed config option in the kernel, and it is unconditionally defined in ext3_fs.h. tune2fs is already able to turn off dir indexing, so at this point it's just cluttering up the code. Remove it. Signed-off-by:
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Alan Cox authored
The early LFS work that Linux uses favours EFBIG in various places. SuSv3 specifically uses EOVERFLOW for this as noted by Michael (Bug 7253) [EOVERFLOW] The named file is a regular file and the size of the file cannot be represented correctly in an object of type off_t. We should therefore transition to the proper error return code Signed-off-by:Alan Cox <alan@redhat.com> Cc: Theodore Tso <tytso@mit.edu> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Arjan van de Ven <arjan@infradead.org> Signed-off-by:
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