- 07 May, 2014 9 commits
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Jeff Mahoney authored
This patch factors out a new balance_leaf_new_nodes_insert from the code in balance_leaf responsible for pasting new content into existing items that may have been shifted into new nodes in the tree. It has not been reformatted yet. Signed-off-by:
Jeff Mahoney <jeffm@suse.com> Signed-off-by:
Jan Kara <jack@suse.cz>
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Jeff Mahoney authored
This patch factors out a new balance_leaf_new_nodes_insert from the code in balance_leaf responsible for inserting new items into new nodes in the tree. It has not been reformatted yet. Signed-off-by:
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Jeff Mahoney authored
This patch factors out a new balance_leaf_paste_right from the code in balance_leaf responsible for pasting new contents into an existing item located in the node to the right of S[0] in the tree. It has not been reformatted yet. Signed-off-by:
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Jeff Mahoney authored
This patch factors out a new balance_leaf_insert_right from the code in balance_leaf responsible for inserting new items into the node to the right of S[0] in the tree. Signed-off-by:
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Jeff Mahoney authored
This patch factors out a new balance_leaf_paste_left from the code in balance_leaf responsible for pasting new content into an existing item located in the node to the left of S[0] in the tree. Signed-off-by:
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Jeff Mahoney authored
This patch factors out a new balance_leaf_insert_left from the code in balance_leaf responsible for inserting new items into the node to the left of S[0] in the tree. It is not yet formatted correctly. Signed-off-by:
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Jeff Mahoney authored
This patch pushes the rest of the state variables in balance_leaf into the tree_balance structure so we can use them when we split balance_leaf into separate functions. Signed-off-by:
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Jeff Mahoney authored
The comments in balance_leaf are as bad as the code. This patch shifts them around to fit in 80 columns and be easier to read. Signed-off-by:
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Jeff Mahoney authored
The hash detection code uses long ugly macros multiple times to get the same value. This patch cleans it up to be easier to read. [JK: Fixed up path leak in find_hash_out()] Signed-off-by:
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- 06 May, 2014 31 commits
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Jeff Mahoney authored
The reiserfs code is littered with extra parens in places where the authors may not have been certain about precedence of & vs ->. This patch cleans them out. Signed-off-by:
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Jeff Mahoney authored
This patch moves reiserfs closer to adhering to the style rules by removing leading whitespace from labels. Signed-off-by:
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Jeff Mahoney authored
make_empty_dir_item_v1 and make_empty_dir_item also needed a bit of cleanup but it's clearer to use separate pointers rather than the array positions for just two items. Signed-off-by:
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Jeff Mahoney authored
journal_join is always called with a block count of 1. Let's just get rid of the argument. Signed-off-by:
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Jeff Mahoney authored
journal_mark_dirty doesn't need a separate sb argument; It's provided by the transaction handle. Signed-off-by:
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Jeff Mahoney authored
journal_end doesn't need a separate sb argument; it's provided by the transaction handle. Signed-off-by:
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Jeff Mahoney authored
journal_end takes a block count argument but doesn't actually use it for anything. We can remove it. Signed-off-by:
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Jeff Mahoney authored
This patch reformats comments in the reiserfs code to fit in 80 columns and to follow the style rules. There is no functional change but it helps make my eyes bleed less. Signed-off-by:
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Jeff Mahoney authored
This patch does a quick search and replace: B_N_PITEM_HEAD() -> item_head() B_N_PDELIM_KEY() -> internal_key() B_N_PKEY() -> leaf_key() B_N_PITEM() -> item_body() And the item_head version: B_I_PITEM() -> ih_item_body() I_ENTRY_COUNT() -> ih_entry_count() And the treepath variants: get_ih() -> tp_item_head() PATH_PITEM_HEAD() -> tp_item_head() get_item() -> tp_item_body() ... which makes the code much easier on the eyes. I've also removed a few unused macros. Checkpatch will complain about the 80 character limit for do_balan.c. I've addressed that in a later patchset to split up balance_leaf(). Signed-off-by:
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Jeff Mahoney authored
The reiserfs write lock hasn't been the BKL for some time. There's no need to have different file systems queued up on the same workqueue. Signed-off-by:
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Linus Torvalds authored
Merge misc fixes from Andrew Morton: "13 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: agp: info leak in agpioc_info_wrap() fs/affs/super.c: bugfix / double free fanotify: fix -EOVERFLOW with large files on 64-bit slub: use sysfs'es release mechanism for kmem_cache revert "mm: vmscan: do not swap anon pages just because free+file is low" autofs: fix lockref lookup mm: filemap: update find_get_pages_tag() to deal with shadow entries mm/compaction: make isolate_freepages start at pageblock boundary MAINTAINERS: zswap/zbud: change maintainer email address mm/page-writeback.c: fix divide by zero in pos_ratio_polynom hugetlb: ensure hugepage access is denied if hugepages are not supported slub: fix memcg_propagate_slab_attrs drivers/rtc/rtc-pcf8523.c: fix month definition
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Dan Carpenter authored
On 64 bit systems the agp_info struct has a 4 byte hole between ->agp_mode and ->aper_base. We need to clear it to avoid disclosing stack information to userspace. Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Fabian Frederick authored
Commit 842a859d ("affs: use ->kill_sb() to simplify ->put_super() and failure exits of ->mount()") adds .kill_sb which frees sbi but doesn't remove sbi free in case of parse_options error causing double free+random crash. Signed-off-by:
Fabian Frederick <fabf@skynet.be> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: <stable@vger.kernel.org> [3.14.x] Signed-off-by:
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Will Woods authored
On 64-bit systems, O_LARGEFILE is automatically added to flags inside the open() syscall (also openat(), blkdev_open(), etc). Userspace therefore defines O_LARGEFILE to be 0 - you can use it, but it's a no-op. Everything should be O_LARGEFILE by default. But: when fanotify does create_fd() it uses dentry_open(), which skips all that. And userspace can't set O_LARGEFILE in fanotify_init() because it's defined to 0. So if fanotify gets an event regarding a large file, the read() will just fail with -EOVERFLOW. This patch adds O_LARGEFILE to fanotify_init()'s event_f_flags on 64-bit systems, using the same test as open()/openat()/etc. Addresses https://bugzilla.redhat.com/show_bug.cgi?id=696821Signed-off-by:
Will Woods <wwoods@redhat.com> Acked-by:
Eric Paris <eparis@redhat.com> Reviewed-by:
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Christoph Lameter authored
debugobjects warning during netfilter exit: ------------[ cut here ]------------ WARNING: CPU: 6 PID: 4178 at lib/debugobjects.c:260 debug_print_object+0x8d/0xb0() ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x20 Modules linked in: CPU: 6 PID: 4178 Comm: kworker/u16:2 Tainted: G W 3.11.0-next-20130906-sasha #3984 Workqueue: netns cleanup_net Call Trace: dump_stack+0x52/0x87 warn_slowpath_common+0x8c/0xc0 warn_slowpath_fmt+0x46/0x50 debug_print_object+0x8d/0xb0 __debug_check_no_obj_freed+0xa5/0x220 debug_check_no_obj_freed+0x15/0x20 kmem_cache_free+0x197/0x340 kmem_cache_destroy+0x86/0xe0 nf_conntrack_cleanup_net_list+0x131/0x170 nf_conntrack_pernet_exit+0x5d/0x70 ops_exit_list+0x5e/0x70 cleanup_net+0xfb/0x1c0 process_one_work+0x338/0x550 worker_thread+0x215/0x350 kthread+0xe7/0xf0 ret_from_fork+0x7c/0xb0 Also during dcookie cleanup: WARNING: CPU: 12 PID: 9725 at lib/debugobjects.c:260 debug_print_object+0x8c/0xb0() ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x20 Modules linked in: CPU: 12 PID: 9725 Comm: trinity-c141 Not tainted 3.15.0-rc2-next-20140423-sasha-00018-gc4ff6c4 #408 Call Trace: dump_stack (lib/dump_stack.c:52) warn_slowpath_common (kernel/panic.c:430) warn_slowpath_fmt (kernel/panic.c:445) debug_print_object (lib/debugobjects.c:262) __debug_check_no_obj_freed (lib/debugobjects.c:697) debug_check_no_obj_freed (lib/debugobjects.c:726) kmem_cache_free (mm/slub.c:2689 mm/slub.c:2717) kmem_cache_destroy (mm/slab_common.c:363) dcookie_unregister (fs/dcookies.c:302 fs/dcookies.c:343) event_buffer_release (arch/x86/oprofile/../../../drivers/oprofile/event_buffer.c:153) __fput (fs/file_table.c:217) ____fput (fs/file_table.c:253) task_work_run (kernel/task_work.c:125 (discriminator 1)) do_notify_resume (include/linux/tracehook.h:196 arch/x86/kernel/signal.c:751) int_signal (arch/x86/kernel/entry_64.S:807) Sysfs has a release mechanism. Use that to release the kmem_cache structure if CONFIG_SYSFS is enabled. Only slub is changed - slab currently only supports /proc/slabinfo and not /sys/kernel/slab/*. We talked about adding that and someone was working on it. [akpm@linux-foundation.org: fix CONFIG_SYSFS=n build] [akpm@linux-foundation.org: fix CONFIG_SYSFS=n build even more] Signed-off-by:Christoph Lameter <cl@linux.com> Reported-by:
Sasha Levin <sasha.levin@oracle.com> Tested-by:
Greg KH <greg@kroah.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Pekka Enberg <penberg@kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by:
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Johannes Weiner authored
This reverts commit 0bf1457f ("mm: vmscan: do not swap anon pages just because free+file is low") because it introduced a regression in mostly-anonymous workloads, where reclaim would become ineffective and trap every allocating task in direct reclaim. The problem is that there is a runaway feedback loop in the scan balance between file and anon, where the balance tips heavily towards a tiny thrashing file LRU and anonymous pages are no longer being looked at. The commit in question removed the safe guard that would detect such situations and respond with forced anonymous reclaim. This commit was part of a series to fix premature swapping in loads with relatively little cache, and while it made a small difference, the cure is obviously worse than the disease. Revert it. Signed-off-by:
Johannes Weiner <hannes@cmpxchg.org> Reported-by:
Christian Borntraeger <borntraeger@de.ibm.com> Acked-by:
Rafael Aquini <aquini@redhat.com> Cc: Rik van Riel <riel@redhat.com> Cc: <stable@kernel.org> [3.12+] Signed-off-by:
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Ian Kent authored
autofs needs to be able to see private data dentry flags for its dentrys that are being created but not yet hashed and for its dentrys that have been rmdir()ed but not yet freed. It needs to do this so it can block processes in these states until a status has been returned to indicate the given operation is complete. It does this by keeping two lists, active and expring, of dentrys in this state and uses ->d_release() to keep them stable while it checks the reference count to determine if they should be used. But with the recent lockref changes dentrys being freed sometimes don't transition to a reference count of 0 before being freed so autofs can occassionally use a dentry that is invalid which can lead to a panic. Signed-off-by:
Ian Kent <raven@themaw.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: <stable@vger.kernel.org> Signed-off-by:
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Johannes Weiner authored
Dave Jones reports the following crash when find_get_pages_tag() runs into an exceptional entry: kernel BUG at mm/filemap.c:1347! RIP: find_get_pages_tag+0x1cb/0x220 Call Trace: find_get_pages_tag+0x36/0x220 pagevec_lookup_tag+0x21/0x30 filemap_fdatawait_range+0xbe/0x1e0 filemap_fdatawait+0x27/0x30 sync_inodes_sb+0x204/0x2a0 sync_inodes_one_sb+0x19/0x20 iterate_supers+0xb2/0x110 sys_sync+0x44/0xb0 ia32_do_call+0x13/0x13 1343 /* 1344 * This function is never used on a shmem/tmpfs 1345 * mapping, so a swap entry won't be found here. 1346 */ 1347 BUG(); After commit 0cd6144a ("mm + fs: prepare for non-page entries in page cache radix trees") this comment and BUG() are out of date because exceptional entries can now appear in all mappings - as shadows of recently evicted pages. However, as Hugh Dickins notes, "it is truly surprising for a PAGECACHE_TAG_WRITEBACK (and probably any other PAGECACHE_TAG_*) to appear on an exceptional entry. I expect it comes down to an occasional race in RCU lookup of the radix_tree: lacking absolute synchronization, we might sometimes catch an exceptional entry, with the tag which really belongs with the unexceptional entry which was there an instant before." And indeed, not only is the tree walk lockless, the tags are also read in chunks, one radix tree node at a time. There is plenty of time for page reclaim to swoop in and replace a page that was already looked up as tagged with a shadow entry. Remove the BUG() and update the comment. While reviewing all other lookup sites for whether they properly deal with shadow entries of evicted pages, update all the comments and fix memcg file charge moving to not miss shmem/tmpfs swapcache pages. Fixes: 0cd6144a ("mm + fs: prepare for non-page entries in page cache radix trees") Signed-off-by:Dave Jones <davej@redhat.com> Acked-by:
Hugh Dickins <hughd@google.com> Signed-off-by:
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Vlastimil Babka authored
The compaction freepage scanner implementation in isolate_freepages() starts by taking the current cc->free_pfn value as the first pfn. In a for loop, it scans from this first pfn to the end of the pageblock, and then subtracts pageblock_nr_pages from the first pfn to obtain the first pfn for the next for loop iteration. This means that when cc->free_pfn starts at offset X rather than being aligned on pageblock boundary, the scanner will start at offset X in all scanned pageblock, ignoring potentially many free pages. Currently this can happen when a) zone's end pfn is not pageblock aligned, or b) through zone->compact_cached_free_pfn with CONFIG_HOLES_IN_ZONE enabled and a hole spanning the beginning of a pageblock This patch fixes the problem by aligning the initial pfn in isolate_freepages() to pageblock boundary. This also permits replacing the end-of-pageblock alignment within the for loop with a simple pageblock_nr_pages increment. Signed-off-by:Vlastimil Babka <vbabka@suse.cz> Reported-by:
Heesub Shin <heesub.shin@samsung.com> Acked-by:
Minchan Kim <minchan@kernel.org> Cc: Mel Gorman <mgorman@suse.de> Acked-by:
Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Cc: Michal Nazarewicz <mina86@mina86.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Christoph Lameter <cl@linux.com> Acked-by:
Rik van Riel <riel@redhat.com> Cc: Dongjun Shin <d.j.shin@samsung.com> Cc: Sunghwan Yun <sunghwan.yun@samsung.com> Cc: <stable@vger.kernel.org> Signed-off-by:
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Seth Jennings authored
sjenning@linux.vnet.ibm.com is no longer a viable entity. Signed-off-by:
Seth Jennings <sjennings@variantweb.net> Signed-off-by:
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Rik van Riel authored
It is possible for "limit - setpoint + 1" to equal zero, after getting truncated to a 32 bit variable, and resulting in a divide by zero error. Using the fully 64 bit divide functions avoids this problem. It also will cause pos_ratio_polynom() to return the correct value when (setpoint - limit) exceeds 2^32. Also uninline pos_ratio_polynom, at Andrew's request. Signed-off-by:
Michal Hocko <mhocko@suse.cz> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Nishanth Aravamudan <nacc@linux.vnet.ibm.com> Cc: Luiz Capitulino <lcapitulino@redhat.com> Cc: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com> Cc: <stable@vger.kernel.org> Signed-off-by:
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Nishanth Aravamudan authored
Currently, I am seeing the following when I `mount -t hugetlbfs /none /dev/hugetlbfs`, and then simply do a `ls /dev/hugetlbfs`. I think it's related to the fact that hugetlbfs is properly not correctly setting itself up in this state?: Unable to handle kernel paging request for data at address 0x00000031 Faulting instruction address: 0xc000000000245710 Oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=2048 NUMA pSeries .... In KVM guests on Power, in a guest not backed by hugepages, we see the following: AnonHugePages: 0 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 64 kB HPAGE_SHIFT == 0 in this configuration, which indicates that hugepages are not supported at boot-time, but this is only checked in hugetlb_init(). Extract the check to a helper function, and use it in a few relevant places. This does make hugetlbfs not supported (not registered at all) in this environment. I believe this is fine, as there are no valid hugepages and that won't change at runtime. [akpm@linux-foundation.org: use pr_info(), per Mel] [akpm@linux-foundation.org: fix build when HPAGE_SHIFT is undefined] Signed-off-by:
Nishanth Aravamudan <nacc@linux.vnet.ibm.com> Reviewed-by:
Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Acked-by:
Mel Gorman <mgorman@suse.de> Cc: Randy Dunlap <rdunlap@infradead.org> Signed-off-by:
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Vladimir Davydov authored
After creating a cache for a memcg we should initialize its sysfs attrs with the values from its parent. That's what memcg_propagate_slab_attrs is for. Currently it's broken - we clearly muddled root-vs-memcg caches there. Let's fix it up. Signed-off-by:
Vladimir Davydov <vdavydov@parallels.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: Michal Hocko <mhocko@suse.cz> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by:
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Chris Cui authored
PCF8523 uses 1-12 to represent month according to datasheet. link: www.nxp.com/documents/data_sheet/PCF8523.pdf. Signed-off-by:
Chris Cui <chris.wei.cui@gmail.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull vfs fixes from Al Viro: "dcache fixes + kvfree() (uninlined, exported by mm/util.c) + posix_acl bugfix from hch" The dcache fixes are for a subtle LRU list corruption bug reported by Miklos Szeredi, where people inside IBM saw list corruptions with the LTP/host01 test. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: nick kvfree() from apparmor posix_acl: handle NULL ACL in posix_acl_equiv_mode dcache: don't need rcu in shrink_dentry_list() more graceful recovery in umount_collect() don't remove from shrink list in select_collect() dentry_kill(): don't try to remove from shrink list expand the call of dentry_lru_del() in dentry_kill() new helper: dentry_free() fold try_prune_one_dentry() fold d_kill() and d_free() fix races between __d_instantiate() and checks of dentry flags
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Al Viro authored
too many places open-code it Signed-off-by:Al Viro <viro@zeniv.linux.org.uk>
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Christoph Hellwig authored
Various filesystems don't bother checking for a NULL ACL in posix_acl_equiv_mode, and thus can dereference a NULL pointer when it gets passed one. This usually happens from the NFS server, as the ACL tools never pass a NULL ACL, but instead of one representing the mode bits. Instead of adding boilerplat to all filesystems put this check into one place, which will allow us to remove the check from other filesystems as well later on. Signed-off-by:
Christoph Hellwig <hch@lst.de> Reported-by:
Ben Greear <greearb@candelatech.com> Reported-by: Marco Munderloh <munderl@tnt.uni-hannover.de>, Cc: Chuck Lever <chuck.lever@oracle.com> Cc: stable@vger.kernel.org Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuseLinus Torvalds authored
Pull fuse fixes from Miklos Szeredi: "This adds ctime update in the new cached writeback mode and also fixes/simplifies the mtime update handling. Support for rename flags (aka renameat2) is also added to the userspace API" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: fuse: add renameat2 support fuse: clear MS_I_VERSION fuse: clear FUSE_I_CTIME_DIRTY flag on setattr fuse: trust kernel i_ctime only fuse: remove .update_time fuse: allow ctime flushing to userspace fuse: fuse: add time_gran to INIT_OUT fuse: add .write_inode fuse: clean up fsync fuse: fuse: fallocate: use file_update_time() fuse: update mtime on open(O_TRUNC) in atomic_o_trunc mode fuse: update mtime on truncate(2) fuse: do not use uninitialized i_mode fuse: fix mtime update error in fsync fuse: check fallocate mode fuse: add __exit to fuse_ctl_cleanup
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparcLinus Torvalds authored
Pull sparc fixes from David Miller: "I've been auditing the THP support on sparc64 and found several bugs, hopefully most of which are fixed completely here. Also an RT kernel locking fix from Kirill Tkhai" * git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc: sparc64: Give more detailed information in {pgd,pmd}_ERROR() and kill pte_ERROR(). sparc64: Add basic validations to {pud,pmd}_bad(). sparc64: Use 'ILOG2_4MB' instead of constant '22'. sparc64: Fix range check in kern_addr_valid(). sparc64: Fix top-level fault handling bugs. sparc64: Handle 32-bit tasks properly in compute_effective_address(). sparc64: Don't use _PAGE_PRESENT in pte_modify() mask. sparc64: Fix hex values in comment above pte_modify(). sparc64: Fix bugs in get_user_pages_fast() wrt. THP. sparc64: Fix huge PMD invalidation. sparc64: Fix executable bit testing in set_pmd_at() paths. sparc64: Normalize NMI watchdog logging and behavior. sparc64: Make itc_sync_lock raw sparc64: Fix argument sign extension for compat_sys_futex().
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David Miller authored
If freelist_idx_t is a byte, SLAB_OBJ_MAX_NUM should be 255 not 256, and likewise if freelist_idx_t is a short, then it should be 65535 not 65536. This was leading to all kinds of random crashes on sparc64 where PAGE_SIZE is 8192. One problem shown was that if spinlock debugging was enabled, we'd get deadlocks in copy_pte_range() or do_wp_page() with the same cpu already holding a lock it shouldn't hold, or the lock belonging to a completely unrelated process. Fixes: a41adfaa ("slab: introduce byte sized index for the freelist of a slab") Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Joonsoo Kim authored
Commit a41adfaa ("slab: introduce byte sized index for the freelist of a slab") changes the size of freelist index and also changes prototype of accessor function to freelist index. And there was a mistake. The mistake is that although it changes the size of freelist index correctly, it changes the size of the index of freelist index incorrectly. With patch, freelist index can be 1 byte or 2 bytes, that means that num of object on on a slab can be more than 255. So we need more than 1 byte for the index to find the index of free object on freelist. But, above patch makes this index type 1 byte, so slab which have more than 255 objects cannot work properly and in consequence of it, the system cannot boot. This issue was reported by Steven King on m68knommu which would use 2 bytes freelist index: https://lkml.org/lkml/2014/4/16/433 To fix is easy. To change the type of the index of freelist index on accessor functions is enough to fix this bug. Although 2 bytes is enough, I use 4 bytes since it have no bad effect and make things more easier. This fix was suggested and tested by Steven in his original report. Signed-off-by:
Steven King <sfking@fdwdc.com> Acked-by:
James Hogan <james.hogan@imgtec.com> Tested-by:
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