- 01 Nov, 2005 3 commits
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Jens Axboe authored
Instead of having ->read_sectors and ->write_sectors, combine the two into ->sectors[2] and similar for the other fields. This saves a branch several places in the io path, since we don't have to care for what the actual io direction is. On my x86-64 box, that's 200 bytes less text in just the core (not counting the various drivers). Signed-off-by:Jens Axboe <axboe@suse.de>
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Jens Axboe authored
Right now we do it at queueing time, which works alright for reads (since they are usually sync), but not for async writes since we can queue io a lot faster than we can complete it. This makes the vmstat output look extremely bursty. Signed-off-by: -
James Courtier-Dutton authored
This adds the magic IO wakeup code for the CardBus version of the Creative Labs Audigy 2 to the snd-emu10k1 driver. Without the magic IO enable sequence, reading from the IO region of the card will fail spectacularly, and the machine will hang. My next task will be getting the driver to actually play sound without distortion. Signed-off-by:
James Courtier-Dutton <James@superbug.co.uk> [ This is a work-in-progress, but since it avoids a total lockup if the emu10k module is loaded on a machine with the cardbus card inserted, we're better off with it than without it, even if sound quality is bad right now ] Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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- 31 Oct, 2005 37 commits
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Andrea Arcangeli authored
When the inode count is zero in inode writeback, the WARN_ON(!(inode->i_state & I_WILL_FREE)); is broken, and needs to test for either I_WILL_FREE|I_FREEING. When the inode is in I_FREEING state, it's already out of the visibility of the vm so it can't be freed so it doesn't require the __iget and the generic_delete_inode path can call the sync internally to the lowlevel fs callback during the last iput. So the inode being in I_FREEING is also a valid condition for calling the sync with i_count == 0. The specific stack trace is this: 0xc00000007b8fb6e0 0xc00000000010118c .__writeback_single_inode +0x5c 0xc00000007b8fb6e0 0xc0000000001014dc (lr) .sync_inode +0x3c 0xc00000007b8fb790 0xc0000000001014dc .sync_inode +0x3c 0xc00000007b8fb820 0xc0000000001a5020 .ext2_sync_inode +0x64 0xc00000007b8fb8f0 0xc0000000001a65b4 .ext2_truncate +0x3f8 0xc00000007b8fba40 0xc0000000001a6940 .ext2_delete_inode +0xdc 0xc00000007b8fbac0 0xc0000000000f7a5c .generic_delete_inode +0x124 0xc00000007b8fbb50 0xc0000000000f5fe0 .iput +0xb8 0xc00000007b8fbbe0 0xc0000000000e9fd4 .sys_unlink +0x2a8 0xc00000007b8fbd10 0xc00000000001048c .ret_from_syscall_1 +0x0 Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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Andrew Morton authored
Jeff Garzik <jgarzik@pobox.com> points out that this was wrong: we need to disable local interrupts while holding KM_IRQ0 due to IRQ sharing. And holding interrupts off during a big PIO opration is expensive, so we only want to do that if we know the page was highmem. So revert commit 17fd47abSigned-off-by:
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Arthur Othieno authored
CONFIG_PC is left-over cruft after the introduction of CONFIG_X86_PC with the subarch split. Remove it, and fixup the remaining users to depend on CONFIG_X86_PC instead. Signed-off-by:
Arthur Othieno <a.othieno@bluewin.ch> Signed-off-by:
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Jens Axboe authored
Tejun Heo notes: "I'm currently debugging this. The problem is that we are using the generic dispatch queue directly in the noop sched and merging is NOT allowed on dispatch queues but generic handling of last_merge tries to merge requests. I'm still trying to verify this, so I'll be back with results soon." In the meantime, disable merging for noop by setting REQ_NOMERGE in elevator_noop_add_request(). Eventually, we should add a noop_list and do the dispatching like in the other io schedulers. Merging is still beneficial for noop (and it has always done it). Signed-off-by: -
Jens Axboe authored
Don't clear ->elevator_data on exit, if we are switching queues we are overwriting the data of the new io scheduler. Signed-off-by:
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Linus Torvalds authored
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Linus Torvalds authored
Manual #include fixups for clashes - there may be some unnecessary
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Anton Altaparmakov authored
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Paul Mackerras authored
The problem is that adbhid[]->input is NULL, so the kernel oopses with a null pointer dereference as soon as a key is pressed. Signed-off-by:
Paul Mackerras <paulus@samba.org> Signed-off-by:
Dmitry Torokhov <dtor@mail.ru>
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Dmitry Torokhov authored
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Dmitry Torokhov authored
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Dmitry Torokhov authored
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Dmitry Torokhov authored
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Dmitry Torokhov authored
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Jeff Garzik authored
A lot of power packed into a little patch. This change eliminates the sharing between our controller-wide spinlock and the SCSI core's Scsi_Host lock. As the locking in libata was already highly compartmentalized, always referencing our own lock, and never scsi_host::host_lock. As a side effect, this change eliminates a deadlock from calling scsi_finish_command() while inside our spinlock.
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Paul Mackerras authored
... namely, the change to the 2-argument pte_alloc_kernel. Signed-off-by: -
Paul Mackerras authored
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Jeff Garzik authored
Integrate ata_exec() and ata_tf_to_host() into their only caller, ata_bus_edd(). Rename ata_tf_to_host_nolock() to ata_tf_to_host(). This makes locking a bit easier to review, and may help pave the way for future changes.
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Paul Mackerras authored
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Paul Mackerras authored
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Paul Mackerras authored
We had a static memory_limit in prom.c, and then another one defined in setup_64.c and used in numa.c, which resulted in the kernel crashing when mem=xxx was given on the command line. This puts the declaration in system.h and the definition in mem.c. This also moves the definition of tce_alloc_start/end out of setup_64.c. Signed-off-by: -
Linus Torvalds authored
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Linus Torvalds authored
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Linus Torvalds authored
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Pekka Enberg authored
This patch removes duplicate directory scanning code from fs/fat/dir.c. The two functions that share identical code are fat_readdirx() and fat_search_long(). This patch also renames fat_readdirx to __fat_readdir(). Signed-off-by:
Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by:
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by:
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OGAWA Hirofumi authored
Now, vfat_rename() is using vfat_find() for sanity check. This removes that sanity check, the cost of sanity check is too high. Signed-off-by:
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OGAWA Hirofumi authored
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Tim Schmielau authored
I recently picked up my older work to remove unnecessary #includes of sched.h, starting from a patch by Dave Jones to not include sched.h from module.h. This reduces the number of indirect includes of sched.h by ~300. Another ~400 pointless direct includes can be removed after this disentangling (patch to follow later). However, quite a few indirect includes need to be fixed up for this. In order to feed the patches through -mm with as little disturbance as possible, I've split out the fixes I accumulated up to now (complete for i386 and x86_64, more archs to follow later) and post them before the real patch. This way this large part of the patch is kept simple with only adding #includes, and all hunks are independent of each other. So if any hunk rejects or gets in the way of other patches, just drop it. My scripts will pick it up again in the next round. Signed-off-by:
Tim Schmielau <tim@physik3.uni-rostock.de> Signed-off-by:
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Paul E. McKenney authored
Combine a bit of redundant code between force_sig_info() and force_sig_specific(). Signed-off-by: paulmck@us.ibm.com Signed-off-by:
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Oleg Nesterov authored
This patch removes checks for ->si_code == SI_TIMER from send_signal, specific_send_sig_info, __group_send_sig_info. I think posix-timers.c used these functions some time ago, now it sends signals via send_{,group_}sigqueue, so these hooks are unneeded. Signed-off-by:Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by:
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Oleg Nesterov authored
This patch simplifies some checks for magic siginfo values. It should not change the behaviour in any way. Signed-off-by:
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Oleg Nesterov authored
This patch replaces hardcoded SEND_SIG_xxx constants with their symbolic names. No changes in affected .o files. Signed-off-by:
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Randy Dunlap authored
- Use kzalloc() instead of kmalloc + memset. - Clean/fix some printk's. - Use NULL for pointers instead of 0. - Combine hpet busy searching locations into a function call. Signed-off-by:
Randy Dunlap <randy_d_dunlap@linux.intel.com> Signed-off-by:
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Randy Dunlap authored
- Use HPET physical address to detect duplicates, not logical addresses. Using logical (mapped) addresses fails to detect duplicates because ioremap() returns a new mapped address each time. - iounmap() regions when duplicate/busy areas are found. Signed-off-by:
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Randy Dunlap authored
Allow the ACPI HPET description table to use a resource type of FIXED_MEM32 for the HPET reource. Use the fixed resoure size of 1 KB for the HPET resource as per the HPET spec. Signed-off-by:
Bob Picco <bob.picco@hp.com> Signed-off-by:
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Clemens Ladisch authored
When booting, display the timer frequency in Hertz instead of as tick length in nanoseconds. Apart from saving a local variable, this makes the message more easily comprehensible. Signed-off-by:
Clemens Ladisch <clemens@ladisch.de> Cc: Bob Picco <bob.picco@hp.com> Signed-off-by:
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