- 01 May, 2005 40 commits
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Ken Chen authored
This patch optimizes io_submit_one to call aio_run_iocb() directly if ctx->run_list is empty. When the list is empty, the operation of adding to the list, then call to __aio_run_iocbs() is unnecessary because these operations are done in one atomic step. ctx->run_list always has only one element in this case. This optimization speeds up industry standard db transaction processing benchmark by 0.2%. Signed-off-by:
Ken Chen <kenneth.w.chen@intel.com> Cc: Benjamin LaHaise <bcrl@kvack.org> Cc: Suparna Bhattacharya <suparna@in.ibm.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Ken Chen authored
Clean up code that was previously used for debug purpose. Remove aio_run, aio_wakeups, iocb->ki_queued and iocb->ki_kicked. Also clean up unused variable count in __aio_run_iocbs() and debug code in read_events(). Signed-off-by:
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Ken Chen authored
Since the tail pointer in aio_ring structure never wrap ring size more than once, so a simple compare is sufficient to wrap the index around. This avoid a more expensive mod operation. Signed-off-by:
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Ken Chen authored
This patch removes superfluous kiocb member initialization in the AIO allocation and deallocation path. For example, in really_put_req(), right before kiocb is returned to slab, 5 variables are reset to NULL. The same variables will be initialized at the kiocb allocation time, so why bother reset them knowing that they will be set to valid data at alloc time? Another example: ki_retry is initialized in __aio_get_req, but is initialized again in io_submit_one. Signed-off-by:
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Emanuele Giaquinta authored
I've noticed that, starting from linux-2.6.12-rc1, in the top Makefile the "cmd_tags" variable has been changed in a way incompatible with *emacs ctags. Since the "--extra" option exists only in "exuberant ctags", it should be included in the CTAGSF shell variable. Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by:
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Yum Rayan authored
This patch reduces the stack usage of the function serial_event() in serial_cs from 2212 to 228. I used a patched version of gcc 3.4.3 on i386 with -fno-unit-at-a-time disabled. This patch is only compile tested. Acked-by:
Randy Dunlap <rddunlap@osdl.org> Signed-off-by:
Yum Rayan <yum.rayan@gmail.com> Signed-off-by:
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Roland Dreier authored
Fix order of #include lines in mthca_memfree.c Signed-off-by:
Roland Dreier <roland@topspin.com> Signed-off-by:
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Jesper Juhl authored
Convert most of the current code that uses _NSIG directly to instead use valid_signal(). This avoids gcc -W warnings and off-by-one errors. Signed-off-by:
Jesper Juhl <juhl-lkml@dif.dk> Signed-off-by:
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Jesper Juhl authored
This patch adds a new function valid_signal() that tests if its argument is a valid signal number. The reasons for adding this new function are: - some code currently testing _NSIG directly has off-by-one errors. Using this function instead avoids such errors. - some code currently tests unsigned signal numbers for <0 which is pointless and generates warnings when building with gcc -W. Using this function instead avoids such warnings. I considered various places to add this function but eventually settled on include/linux/signal.h as the most logical place for it. If there's some reason this is a bad choice then please let me know (hints as to a better location are then welcome of course). Signed-off-by:
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Kylene Hall authored
This patch adds the maintainers entry. Signed-off-by:
Kylene Hall <kjhall@us.ibm.com> Signed-off-by:
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Stephen Rothwell authored
Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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Andreas Schwab authored
Signed-off-by:
Andreas Schwab <schwab@suse.de> Signed-off-by:
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Corey Minyard authored
Correct an issue with the IPMI message layer taking a lock and calling lower layer driver. If an error occrues at the lower layer the lock can be taken again causing a deadlock. The lock is released before calling the lower layer. Signed-off-by:
David Griego <dgriego@mvista.com> Signed-off-by:
Corey Minyard <minyard@acm.org> Signed-off-by:
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Corey Minyard authored
Enable interrupts for a BT interface. There is a specific register that needs to be set up to enable interrupts that also must be modified to clear the irq. Also, don't reset the BMC on a BT interface. That's probably not a good idea as the BMC may be performing other important functions and a reset should only be a last resort. Also, that register is also used to enable/disable interrupts to the BT; modifying it may screw up the interrupts. Signed-off-by:
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Corey Minyard authored
If there is an unexpected close, still allow the watchdog interface to be re-opened on the IPMI watchdog. Signed-off-by:
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Corey Minyard authored
If the ACPI register bit width is zero (an invalid value) assume it is the default spacing. This avoids some coredumps on invalid data and makes some systems work that have broken ACPI data. Signed-off-by:
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Corey Minyard authored
Ignore the bottom bit of the base address from the DMI data. It is supposed to be set to 1 if it is I/O space. Few systems do this, but this enables the ones that do set it to work properly. Signed-off-by:
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aquynh@gmail.com authored
Documentation/dontdiff is a little messy. Here is a patch to sort the content of that file in alphabetical Signed-off-by:
Nguyen Anh Quynh <aquynh@gmail.com> Signed-off-by:
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Edward Shishkin authored
This fixes segmentation fault when specifying bad journal device via a mount option. Don't pass a zero pointer to bdevname() if filp_open() returns error. Signed-off-by:
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Nicolas Boichat authored
Add missing button codes for the Leadtek Winfast remote controls. Signed-off-by:
Nicolas Boichat <nicolas@boichat.ch> Signed-off-by:
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Vinay K Nallamothu authored
The variable attributes "packed" and "align" when used with struct, should have the following order: struct ... {...} __attribute__((packed)) var; This patch fixes few instances where the variable and attributes are placed the other way around and had no effect. Signed-off-by: -
Jesper Juhl authored
There were still a few comments left refering to verify_area, and two functions, verify_area_skas & verify_area_tt that just wrap corresponding access_ok_skas & access_ok_tt functions, just like verify_area does for access_ok - deprecate those. There was also a few places that still used verify_area in commented-out code, fix those up to use access_ok. After applying this one there should not be anything left but finally removing verify_area completely, which will happen after a kernel release or two. Signed-off-by:
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Stephen Rothwell authored
Discussing with Matthew Wilcox some of his outstanding patches lead me to this patch (among others). The preamble in struct sigevent can be expressed independently of the architecture. Also use __ARCH_SI_PREAMBLE_SIZE on ia64. Signed-off-by:
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Joel Becker authored
I recently realized that the in-kernel copy of hangcheck-timer was quite stale. Here's the latest. It adds support for s390, ppc64, and ia64 too. Signed-off-by:
Joel Becker <joel.becker@oracle.com> Signed-off-by:
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Bill Nottingham authored
When allocating a new VC with vgacon_init(), the font is shared across all the VGA consoles. However, the font mask was always set to the default value of zero in visual_init(), even if we were using 512 character fonts at the time. Moreover, code in vgacon.c:vga_do_font_op() didn't reset the mask if the console driver thinks it's already in 512 character mode. This means that to *fix* it, you'd actually have to take the console out of 512 character mode and then set it back. The attached sets vc_hi_font_mask in vgacon_init() for any new consoles opened if the vgacon driver is already in 512 character mode, solving this. This bug goes back to 2.4.18 at least, probably earlier. Signed-off-by:
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Jan Kara authored
Allow rewriting of a file and extending a file upto the end of the allocated block on a full filesystem. From: Chris Mason <mason@suse.com> Signed-off-by:
Jan Kara <jack@suse.cz> Signed-off-by:
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Lars Marowsky-Bree authored
This patches adds the "nbds_max" parameter to the nbd kernel module, which limits the number of nbds allocated. Previously, always all 128 entries were allocated unconditionally, which used to waste resources and needlessly flood the hotplug system with events. (Defaults to 16 now.) Signed-off-by:
Lars Marowsky-Bree <lmb@suse.de> Signed-off-by:
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Joe Korty authored
Add EOWNERDEAD and ENOTRECOVERABLE to all architectures. This is to support the upcoming patches for robust mutexes. We normally don't reserve parts of the name/number space for external patches, but robust mutexes are sufficiently popular and important to justify it in this case. Signed-off-by:
Joe Korty <joe.korty@ccur.com> Signed-off-by:
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Jens Axboe authored
Profiling hit rates on merging shows that the last merge hint works extremely well for most work loads. So lets kill the linear merge scan in noop-iosched, so it provides O(1) run time for any operation. Testing credits go to Ken Chen from Intel. Signed-off-by:
Jens Axboe <axboe@suse.de> Signed-off-by:
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Yoshinori Sato authored
kallsyms does not consider SYMBOL_PREFIX of C. Consequently it does not work on architectures using that prefix character (h8300, v850). Signed-off-by:
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Peter Missel authored
This is take two of a patch that should have appeared two days ago, before yesterday's "remote control" patch for the same card. This patch sets unconnected GPIO to Output to keep them from floating (just good driver writing practice, being nice to the chip), and uses GPIO16 to switch TV vs. FM - this pin switches inputs onto the tuner, as well as the audio output from the tuner into the 7135 SIF input. Consequently, FM radio support is being un-commented because it's now working (sort of, see below). These two patches get the card almost fully operational; there appears to be a bug in tda8290.c remaining that puts an offset onto the tuned frequency in FM radio mode. We're investigating. Signed-off-by:
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Peter Missel authored
Subject says it ... this card's IR microcontroller design and attachment are compatible to the company's previous designs, so the patch was as simple as it gets. DESC LifeView FlyTV Platinum FM: GPIO usage EDESC From: Peter Missel <peter.missel@onlinehome.de> This is take two of a patch that should have appeared two days ago, before yesterday's "remote control" patch for the same card. This patch sets unconnected GPIO to Output to keep them from floating (just good driver writing practice, being nice to the chip), and uses GPIO16 to switch TV vs. FM - this pin switches inputs onto the tuner, as well as the audio output from the tuner into the 7135 SIF input. Consequently, FM radio support is being un-commented because it's now working (sort of, see below). These two patches get the card almost fully operational; there appears to be a bug in tda8290.c remaining that puts an offset onto the tuned frequency in FM radio mode. We're investigating. Signed-off-by:
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Paolo 'Blaisorblade' Giarrusso authored
It's trivial for the resize option to auto-get the underlying device size, while it's harder for the user. I've copied the code from jfs. Since of the different reiserfs option parser (which does not use the superior match_token used by almost every other filesystem), I've had to use the "resize=auto" and not "resize" option to specify this behaviour. Changing the option parser to the kernel one wouldn't be bad but I've no time to do this cleanup in this moment. Btw, the mount(8) man page should be updated to include this option. Cc the relevant people, please (I hope I cc'ed the right people). Cc: <reiserfs-dev@namesys.com> Cc: <reiserfs-list@namesys.com> Cc: <mtk-manpages@gmx.net> Cc: Alex Zarochentsev <zam@namesys.com> Signed-off-by:
Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by:
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Paul E. McKenney authored
Update the RCU documentation to allow for the new synchronize_rcu() and synchronize_sched() primitives. Fix a few other nits as well. Signed-off-by:
Paul E. McKenney <paulmck@us.ibm.com> Signed-off-by:
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Paul E. McKenney authored
This patch changes calls to synchronize_kernel(), deprecated in the earlier "Deprecate synchronize_kernel, GPL replacement" patch to instead call the new synchronize_rcu() and synchronize_sched() APIs. Signed-off-by:
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Paul E. McKenney authored
The synchronize_kernel() primitive is used for quite a few different purposes: waiting for RCU readers, waiting for NMIs, waiting for interrupts, and so on. This makes RCU code harder to read, since synchronize_kernel() might or might not have matching rcu_read_lock()s. This patch creates a new synchronize_rcu() that is to be used for RCU readers and a new synchronize_sched() that is used for the rest. These two new primitives currently have the same implementation, but this is might well change with additional real-time support. Both new primitives are GPL-only, the old primitive is deprecated. Signed-off-by:
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Paul E. McKenney authored
Add a deprecated_for_modules macro that allows symbols to be deprecated only when used by modules, as suggested by Andrew Morton some months back. Signed-off-by:
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Paul E. McKenney authored
The gpl exports need to be put back. Moving them to GPL -- but in a measured manner, as I proposed on this list some months ago -- is fine. Changing these particular exports precipitously is most definitely -not- fine. Here is my earlier proposal: http://marc.theaimsgroup.com/?l=linux-kernel&m=110520930301813&w=2 See below for a patch that puts the exports back, along with an updated version of my earlier patch that starts the process of moving them to GPL. I will also be following this message with RFC patches that introduce two (EXPORT_SYMBOL_GPL) interfaces to replace synchronize_kernel(), which then becomes deprecated. Signed-off-by: <paulmck@us.ibm.com> Signed-off-by:
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Daniel Drake authored
The current logic assumes that a /proc/<PID>/task directory should have a hardlink count of 3, probably counting ".", "..", and a directory for a single child task. It's fairly obvious that this doesn't work out correctly when a PID has more than one child task, which is quite often the case. Signed-off-by:
Daniel Drake <dsd@gentoo.org> Signed-off-by:
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Daniel Drake authored
The pid directories in /proc/ currently return the wrong hardlink count - 3, when there are actually 4 : ".", "..", "fd", and "task". This is easy to notice using find(1): cd /proc/<pid> find In the output, you'll see a message similar to: find: WARNING: Hard link count is wrong for .: this may be a bug in your filesystem driver. Automatically turning on find's -noleaf option. Earlier results may have failed to include directories that should have been searched. http://bugs.gentoo.org/show_bug.cgi?id=86031 I also noticed that CONFIG_SECURITY can add a 5th: attr, and performed a similar fix on the task directories too. Signed-off-by:
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