- 01 Oct, 2006 40 commits
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Chen, Kenneth W authored
Signed-off-by:
Ken Chen <kenneth.w.chen@intel.com> Acked-by:
Zach Brown <zach.brown@oracle.com> Cc: Suparna Bhattacharya <suparna@in.ibm.com> Cc: Benjamin LaHaise <bcrl@kvack.org> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Badari Pulavarty authored
This work is initially done by Zach Brown to add support for vectored aio. These are the core changes for AIO to support IOCB_CMD_PREADV/IOCB_CMD_PWRITEV. [akpm@osdl.org: huge build fix] Signed-off-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Badari Pulavarty <pbadari@us.ibm.com> Acked-by:
Benjamin LaHaise <bcrl@kvack.org> Acked-by:
James Morris <jmorris@namei.org> Signed-off-by:
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Badari Pulavarty authored
This patch cleans up generic_file_*_read/write() interfaces. Christoph Hellwig gave me the idea for this clean ups. In a nutshell, all filesystems should set .aio_read/.aio_write methods and use do_sync_read/ do_sync_write() as their .read/.write methods. This allows us to cleanup all variants of generic_file_* routines. Final available interfaces: generic_file_aio_read() - read handler generic_file_aio_write() - write handler generic_file_aio_write_nolock() - no lock write handler __generic_file_aio_write_nolock() - internal worker routine Signed-off-by:
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Badari Pulavarty authored
This patch removes readv() and writev() methods and replaces them with aio_read()/aio_write() methods. Signed-off-by:
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Badari Pulavarty authored
This patch vectorizes aio_read() and aio_write() methods to prepare for collapsing all aio & vectored operations into one interface - which is aio_read()/aio_write(). Signed-off-by:
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Jeff Mahoney authored
When a file system becomes fragmented (using MythTV, for example), the bigalloc window searching ends up causing huge performance problems. In a file system presented by a user experiencing this bug, the file system was 90% free, but no 32-block free windows existed on the entire file system. This causes the allocator to scan the entire file system for each 128k write before backing down to searching for individual blocks. In the end, finding a contiguous window for all the blocks in a write is an advantageous special case, but one that can be found naturally when such a window exists anyway. This patch removes the bigalloc window searching, and has been proven to fix the test case described above. Signed-off-by:
Jeff Mahoney <jeffm@suse.com> Signed-off-by:
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Jeff Mahoney authored
The other common disk-based file systems (I checked ext[23], xfs, jfs) check to ensure that opens of files > 2 GB fail unless O_LARGEFILE is specified. They check via generic_file_open or their own open routine. ReiserFS doesn't have an f_op->open defined, and as such, it's possible to open files > 2 GB without O_LARGEFILE. This patch adds the f_op->open member to conform with the expected behavior. Signed-off-by:
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Jeff Mahoney authored
This is the patch the three previous ones have been leading up to. It changes the behavior of ReiserFS from loading and caching all the bitmaps as special, to treating the bitmaps like any other bit of metadata and just letting the system-wide caches figure out what to hang on to. Buffer heads are allocated on the fly, so there is no need to retain pointers to all of them. The caching of the metadata occurs when the data is read and updated, and is considered invalid and uncached until then. I needed to remove the vs-4040 check for performing a duplicate operation on a particular bit. The reason is that while the other sites for working with bitmaps are allowed to schedule, is_reusable() is called from do_balance(), which will panic if a schedule occurs in certain places. The benefit of on-demand bitmaps clearly outweighs a sanity check that depends on a compile-time option that is discouraged. [akpm@osdl.org: warning fix] Signed-off-by:
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Jeff Mahoney authored
This patch moves the bitmap loading code from super.c to bitmap.c The code is also restructured somewhat. The only difference between new format bitmaps and old format bitmaps is where they are. That's a two liner before loading the block to use the correct one. There's no need for an entirely separate code path. The load path is generally the same, with the pattern being to throw out a bunch of requests and then wait for them, then cache the metadata from the contents. Again, like the previous patches, the purpose is to set up for later ones. Update: There was a bug in the previously posted version of this that resulted in corruption. The problem was that bitmap 0 on new format file systems must be treated specially, and wasn't. A stupid bug with an easy fix. This is hopefully the last fix for the disaster that is the reiserfs bitmap patch set. If a bitmap block was full, first_zero_hint would end up at zero since it would never be changed from it's zeroed out value. This just sets it beyond the end of the bitmap block. If any bits are freed, it will be reset to a valid bit. When info->free_count = 0, then we already know it's full. Signed-off-by:
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Jeff Mahoney authored
Similar to the SB_JOURNAL cleanup that was accepted a while ago, this patch uses a temporary variable for buffer head references from the bitmap info array. This makes the code much more readable in some areas. It also uses proper reference counting, doing a get_bh() after using the pointer from the array and brelse()'ing it later. This may seem silly, but a later patch will replace the simple temporary variables with an actual read, so the reference freeing will be used then. Signed-off-by:
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Jeff Mahoney authored
There is a check in is_reusable to determine if a particular block is a bitmap block. It verifies this by going through the array of bitmap block buffer heads and comparing the block number to each one. Bitmap blocks are at defined locations on the disk in both old and current formats. Simply checking against the known good values is enough. This is a trivial optimization for a non-production codepath, but this is the first in a series of patches that will ultimately remove the buffer heads from that array. Signed-off-by:
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Atsushi Nemoto authored
With 2.6.18-rc4-mm2, now wall_jiffies will always be the same as jiffies. So we can kill wall_jiffies completely. This is just a cleanup and logically should not change any real behavior except for one thing: RTC updating code in (old) ppc and xtensa use a condition "jiffies - wall_jiffies == 1". This condition is never met so I suppose it is just a bug. I just remove that condition only instead of kill the whole "if" block. [heiko.carstens@de.ibm.com: s390 build fix and cleanup] Signed-off-by:
Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Andi Kleen <ak@muc.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ian Molton <spyro@f2s.com> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Hirokazu Takata <takata.hirokazu@renesas.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Richard Curnow <rc@rc0.org.uk> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: Chris Zankel <chris@zankel.net> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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Adrian Bunk authored
This patch contains the following possible cleanups: - make the following needlessly global function static: - ntp_update_frequency() - make the following needlessly global variables static: - time_state - time_offset - time_constant - time_reftime - remove the following read-only global variable: - time_precision Signed-off-by:
Adrian Bunk <bunk@stusta.de> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by:
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Roman Zippel authored
Remove a few unused defines and remove obsolete information from comments. Signed-off-by:
Roman Zippel <zippel@linux-m68k.org> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by:
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Roman Zippel authored
This converts the kernel ntp model into a model which matches the nanokernel reference implementations. The previous patches already increased the resolution and precision of the computations, so that this conversion becomes quite simple. <linux@horizon.com> explains: The original NTP kernel interface was defined in units of microseconds. That's what Linux implements. As computers have gotten faster and can now split microseconds easily, a new kernel interface using nanosecond units was defined ("the nanokernel", confusing as that name is to OS hackers), and there's an STA_NANO bit in the adjtimex() status field to tell the application which units it's using. The current ntpd supports both, but Linux loses some possible timing resolution because of quantization effects, and the ntpd hackers would really like to be able to drop the backwards compatibility code. Ulrich Windl has been maintaining a patch set to do the conversion for years, but it's hard to keep in sync. Signed-off-by: -
Roman Zippel authored
This converts time_freq to a scaled nsec value and adds around 6bit of extra resolution. This pushes the time_freq to its 32bit limits so the calculatons have to be done with 64bit. Signed-off-by:
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Roman Zippel authored
time_tolerance isn't changed at all in the kernel, so simply remove it, this simplifies the next patch, as it avoids a number of conversions. Signed-off-by:
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Roman Zippel authored
This folds update_ntp_one_tick() into second_overflow() and adds time_adjust to the tick length, this makes time_next_adjust unnecessary. This slightly changes the adjtime() behaviour, instead of applying it to the next tick, it's applied to the next second. Signed-off-by:
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Roman Zippel authored
This converts time_offset into a scaled per tick value. This avoids now completely the crude compensation in second_overflow(). Signed-off-by:
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Roman Zippel authored
This adds the frequency part to ntp_update_frequency(). Signed-off-by:
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Roman Zippel authored
This makes time_adj local to second_overflow() and integrates it into the tick length instead of adding it everytime. Signed-off-by:
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Roman Zippel authored
This introduces ntp_update_frequency() and deinlines ntp_clear() (as it's not performance critical). ntp_update_frequency() calculates the base tick length using tick_usec and adds a base adjustment, in case the frequency doesn't divide evenly by HZ. Signed-off-by:
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john stultz authored
Move all the NTP related code to ntp.c [akpm@osdl.org: cleanups, build fix] Signed-off-by:
John Stultz <johnstul@us.ibm.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by:
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Josh Triplett authored
The lock annotation macros __acquires, __releases, __acquire, and __release all currently throw away the lock expression passed as an argument. Now that sparse can parse __context__ and __attribute__((context)) with a context expression, pass the lock expression down to sparse as the context expression. This requires a version of sparse from GIT commit 37475a6c1c3e66219e68d912d5eb833f4098fd72 or later. Signed-off-by:
Josh Triplett <josh@freedesktop.org> Signed-off-by:
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Corey Minyard authored
If the driver has interrupts available to it, there is really no reason to have a kernel daemon push the IPMI state machine. Note that I have experienced machines where the interrupts do not work correctly. This was a long time ago and hopefully things are better now. If some machines still have broken interrupts, a blacklist will need to be added. Signed-off-by:
Corey Minyard <minyard@acm.org> Signed-off-by:
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David Brownell authored
This syncs the omap_cf driver with the one from the linux-omap tree. Changes include fixing build warnings (section mismatch, unused return value) and coping with various pcmcia core changes related to managing i/o memory and irq resources. Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by:
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Atsushi Nemoto authored
Check return value of sysfs_create_bin_file(). Fix polarity of RTC_BATT_FLAG bit in DS1742. Signed-off-by:
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David Brownell authored
This lets the at91rm9200 RTC alarm be a system wakeup irq, according to the setting of /sys/devices/platform/at91_rtc/power/wakeup. User code can set the alarm, put the system into a low power mode, and then rely on it waking up no later than the specified moment. Signed-off-by:
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David Brownell authored
Update RTC framework so that drivers can constify their method tables, moving them from ".data" to ".rodata". Then update the drivers. Signed-off-by:
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David Brownell authored
The rtc_is_valid_tm() routine needs to treat some of the fields it checks as unsigned, to prevent wrongly accepting invalid rtc_time structs; this is the same approach used elsewhere in the RTC code for such tests. Conversely, rtc_proc_show() is missing one invalid-day-of-month test that rtc_is_valid_tm() makes: there is no day zero. Signed-off-by:
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David Brownell authored
This makes RTC core components use "subsys_init" instead of "module_init", as appropriate for subsystem infrastructure. This is mostly useful for statically linking drivers in other parts of the tree that may provide an RTC interface as a secondary functionality (e.g. part of a multifunction chip); they won't need to worry so much about drivers/Makefile link order. Signed-off-by:
Oleg Verych <olecom@flower.upol.cz> Signed-off-by:
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David Brownell authored
Small updates to make the RTC class Kconfig text be more informative. This should help folk used to the drivers/char/rtc.c support, or a single RTC, be slightly less surprised by the differences. Also, adds a new RTC_DEBUG option to predefine DEBUG in the framework and its drivers, while debugging. That's getting to be a standard idiom, and it's pretty useful. Signed-off-by:
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Randy Dunlap authored
SYSCTL should still depend on EMBEDDED. This unbreaks the EMBEDDED menu (from the recent SYSCTL_SYCALL menu option patch). Fix typos in new SYSCTL_SYSCALL menu. Signed-off-by:
Randy Dunlap <rdunlap@xenotime.net> Signed-off-by:
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Jean-Baptiste Maneyrol authored
The century bit PCF8563_MO_C in the month register is misinterpreted. It is set to 1 for the 20th century and 0 for 21th, and the driver is expecting the opposite behavior. Acked-by:
Alessandro Zummo <a.zummo@towertech.it> Cc: <stable@kernel.org> Signed-off-by:
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Jiri Slaby authored
The driver is allocating a page but doesn't actually use it for anything. (History from the old ->write method before Linus cleaned it up) Signed-off-by:
Jiri Slaby <jirislaby@gmail.com> Acked-by:
Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by:
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Peter Zijlstra authored
All on stack DECLARE_COMPLETIONs should be replaced by: DECLARE_COMPLETION_ONSTACK Signed-off-by:
Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by:
Ingo Molnar <mingo@elte.hu> Acked-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Eric Sesterhenn authored
Looks like the probe function always gets a valid pdev, and checking it after dereferencing it is pretty useless. This patch removes the check (cid #1365) Signed-off-by:
Eric Sesterhenn <snakebyte@gmx.de> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Raphael Assenat <raph@raphnet.net> Signed-off-by:
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Rolf Eike Beer authored
BUG_ON() does this unlikely check itself, as bugs in Linux are unlikely anyway :) Signed-off-by:
Rolf Eike Beer <eike-kernel@sf-tec.de> Acked-by:
Benjamin LaHaise <benjamin.c.lahaise@intel.com> Signed-off-by:
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Jan Altenberg authored
Address some simple typos in rt-mutex-design.txt It also changes the indentation of the cmpxchg example (the cmpxchg example was indented by spaces, while all other code snippets were indented by tabs). Acked-by:
Steven Rostedt <rostedt@goodmis.org> Signed-off-by:
Jan Altenberg <tb10alj@tglx.de> Acked-by:
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Soos Peter authored
Support hdaps on Lenovo ThinkPad T60. It was tested with pivot utility from http://www.kernel.org/pub/linux/kernel/people/rml/hdaps and it seems to be OK. Cc: Jean Delvare <khali@linux-fr.org> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Robert Love <rml@novell.com> Signed-off-by:
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