- 18 Jun, 2009 40 commits
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KAMEZAWA Hiroyuki authored
A user can set memcg.limit_in_bytes == memcg.memsw.limit_in_bytes when the user just want to limit the total size of applications, in other words, not very interested in memory usage itself. In this case, swap-out will be done only by global-LRU. But, under current implementation, memory.limit_in_bytes is checked at first and try_to_free_page() may do swap-out. But, that swap-out is useless for memsw.limit_in_bytes and the thread may hit limit again. This patch tries to fix the current behavior at memory.limit == memsw.limit case. And documentation is updated to explain the behavior of this special case. Signed-off-by:
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Dhaval Giani <dhaval@linux.vnet.ibm.com> Cc: YAMAMOTO Takashi <yamamoto@valinux.co.jp> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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KAMEZAWA Hiroyuki authored
This patch fixes mis-accounting of swap usage in memcg. In the current implementation, memcg's swap account is uncharged only when swap is completely freed. But there are several cases where swap cannot be freed cleanly. For handling that, this patch changes that memcg uncharges swap account when swap has no references other than cache. By this, memcg's swap entry accounting can be fully synchronous with the application's behavior. This patch also changes memcg's hooks for swap-out. Signed-off-by:
Balbir Singh <balbir@in.ibm.com> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Dhaval Giani <dhaval@linux.vnet.ibm.com> Cc: YAMAMOTO Takashi <yamamoto@valinux.co.jp> Signed-off-by:
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Li Zefan authored
This forward declaration seems pointless. Signed-off-by:
Li Zefan <lizf@cn.fujitsu.com> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Acked-by:
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Li Zefan authored
We don't need to check do_swap_account in the case that the function which checks do_swap_account will never get called if do_swap_account == 0. Signed-off-by:
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Daisuke Nishimura authored
mem_cgroup_cache_charge_swapin() isn't used any more, so remove no-op definition of it in header file. Signed-off-by:
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@linux.vnet.ibm.com> Acked-by:
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Balbir Singh authored
Add file RSS tracking per memory cgroup We currently don't track file RSS, the RSS we report is actually anon RSS. All the file mapped pages, come in through the page cache and get accounted there. This patch adds support for accounting file RSS pages. It should 1. Help improve the metrics reported by the memory resource controller 2. Will form the basis for a future shared memory accounting heuristic that has been proposed by Kamezawa. Unfortunately, we cannot rename the existing "rss" keyword used in memory.stat to "anon_rss". We however, add "mapped_file" data and hope to educate the end user through documentation. [hugh.dickins@tiscali.co.uk: fix mem_cgroup_update_mapped_file_stat oops] Signed-off-by:
Balbir Singh <balbir@linux.vnet.ibm.com> Acked-by:
Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by:
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Li Zefan authored
While walking through the whitelist, if the DEV_ALL item is found, no more check is needed. Signed-off-by:
Serge Hallyn <serue@us.ibm.com> Signed-off-by:
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Li Zefan authored
The 'noprefix' option was introduced for backwards-compatibility of cpuset, but actually it can be used when mounting other subsystems. This results in possibility of name collision, and now the collision can really happen, because we have 'stat' file in both memory and cpuacct subsystem: # mount -t cgroup -o noprefix,memory,cpuacct xxx /mnt Cgroup will happily mount the 2 subsystems, but only 'stat' file of memory subsys can be seen. We don't want users to use nopreifx, and also want to avoid name collision, so we change to allow noprefix only if mounting just the cpuset subsystem. [akpm@linux-foundation.org: fix shift for cpuset_subsys_id >= 32] Signed-off-by:
Dhaval Giani <dhaval@linux.vnet.ibm.com> Signed-off-by:
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Randy Dunlap authored
Fix some cgroup messages to read better. Update MAINTAINERS to include mm/*cgroup* files. Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Cc: Paul Menage <menage@google.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by:
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Jaswinder Singh Rajput authored
Currently cn_test_want_notify() has no user. So add an ifdef and a comment which tells us to not remove it. Signed-off-by:
Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Acked-by:
Evgeniy Polyakov <zbr@ioremap.net> Signed-off-by:
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Jose Luis Perez Diez authored
Perl is used on the kernel Makefile to generate documentation, firmwares in c source form, sources, graphs, and some headers and this fact is undocumented. [akpm@linux-foundation.org: 80-columns, please] Signed-off-by:
Jose Luis Perez Diez <jluis@escomposlinux.org> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by:
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Jeff Mahoney authored
Several code paths in reiserfs have a construct like: if (is_direntry_le_ih(ih = B_N_PITEM_HEAD(src, item_num))) ... which, in addition to being ugly, end up causing compiler warnings with gcc 4.4.0. Previous compilers didn't issue a warning. fs/reiserfs/do_balan.c:1273: warning: operation on `aux_ih' may be undefined fs/reiserfs/lbalance.c:393: warning: operation on `ih' may be undefined fs/reiserfs/lbalance.c:421: warning: operation on `ih' may be undefined fs/reiserfs/lbalance.c:777: warning: operation on `ih' may be undefined I believe this is due to the ih being passed to macros which evaluate the argument more than once. This is old code and we haven't seen any problems with it, but this patch eliminates the warnings. It converts the multiple evaluation macros to static inlines and does a preassignment for the cases that were causing the warnings because that code is just ugly. Reported-by:
Chris Mason <mason@oracle.com> Signed-off-by:
Jeff Mahoney <jeffm@suse.com> Signed-off-by:
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Roel Kluin authored
unsigned i_block,fragment cannot be negative. Signed-off-by:
Roel Kluin <roel.kluin@gmail.com> Signed-off-by:
Evgeniy Dushistov <dushistov@mail.ru> Signed-off-by:
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Jan Kara authored
Remove unused variables from isofs_sb_info (used to be some mount options), unify variables for option to use 0/1 (some options used 'y'/'n'), use bit fields for option flags in superblock. Signed-off-by:
Jan Kara <jack@suse.cz> Signed-off-by:
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Jan Kara authored
isofs allows setting of default uid and gid of files but value 0 was used to indicate that user did not specify any uid/gid mount option. Since this option also overrides uid/gid set in Rock Ridge extension, it makes sense to allow forcing uid/gid 0. Fix option processing to allow this. Cc: <Hans-Joachim.Baader@cjt.de> Signed-off-by:
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Jan Kara authored
So far, permissions set via 'mode' and/or 'dmode' mount options were effective only if the medium had no rock ridge extensions (or was mounted without them). Add 'overriderockmode' mount option to indicate that these options should override permissions set in rock ridge extensions. Maybe this should be default but the current behavior is there since mount options were created so I think we should not change how they behave. Cc: <Hans-Joachim.Baader@cjt.de> Signed-off-by:
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Jan Kara authored
As Ted pointed out, it can happen that ext3_truncate() returns without removing inode from orphan list. This way we could in some rare cases (like when we get ENOMEM from an allocation in ext3_truncate called because of failed ext3_write_begin) leave the inode on orphan list and that triggers assertion failure on umount. So make ext3_truncate() always remove inode from in-memory orphan list. Cc: Theodore Ts'o <tytso@mit.edu> Signed-off-by:
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Hisashi Hifumi authored
I delete the following patch "commit 3f31fddf Author: Mingming Cao <cmm@us.ibm.com> Date: Fri Jul 25 01:46:22 2008 -0700 jbd: fix race between free buffer and commit transaction This patch is no longer needed because if race between freeing buffer and committing transaction functionality occurs and dio gets error, currently dio falls back to buffered IO by the following patch. commit 6ccfa806 Author: Hisashi Hifumi <hifumi.hisashi@oss.ntt.co.jp> Date: Tue Sep 2 14:35:40 2008 -0700 VFS: fix dio write returning EIO when try_to_release_page fails Signed-off-by:
Hisashi Hifumi <hifumi.hisashi@oss.ntt.co.jp> Cc: Theodore Tso <tytso@mit.edu> Cc: Mingming Cao <cmm@us.ibm.com> Acked-by:
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Jan Kara authored
Chain verification in ext3_get_blocks() has been hosed since it called verify_chain(chain, NULL) which always returns success. As a result readers could in theory race with truncate. On the other hand the race probably cannot happen with the current locking scheme, since by the time ext3_truncate() is called all the pages are already removed and hence get_block() shouldn't be called on such pages... Signed-off-by:
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Michael Shields authored
ext2.txt says that dirs can have 32,768 subdirs, but the actual value of EXT2_LINK_MAX is 32000. ext3 is the same, but the doc does not mention it. One of ext4's features is to "fix 32000 subdirectory limit". Signed-off-by:
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Jan Kara authored
One of our users is complaining that his backup tool is upset on ext2 (while it's happy on ext3, xfs, ...) because of the mtime change. The problem is: mkdir foo mkdir bar mkdir foo/a Now under ext2: mv foo/a foo/b changes mtime of 'foo/a' (foo/b after the move). That does not really make sense and it does not happen under any other filesystem I've seen. More complicated is: mv foo/a bar/a This changes mtime of foo/a (bar/a after the move) and it makes some sense since we had to update parent directory pointer of foo/a. But again, no other filesystem does this. So after some thoughts I'd vote for consistency and change ext2 to behave the same as other filesystems. Do not update mtime of a moved directory. Specs don't say anything about it (neither that it should, nor that it should not be updated) and other common filesystems (ext3, ext4, xfs, reiserfs, fat, ...) don't do it. So let's become more consistent. Spotted by ronny.pretzsch@dfs.de, initial fix by Jörn Engel. Reported-by: <ronny.pretzsch@dfs.de> Cc: <hare@suse.de> Cc: Jörn Engel <joern@logfs.org> Signed-off-by: -
Nate Case authored
PCA9556 is the software-compatible predecessor to the PCA9557, so add it to the supported I2C device ID table. Signed-off-by:
Nate Case <ncase@xes-inc.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by:
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Nate Case authored
On OpenFirmware platforms, it makes the most sense to get platform_data from the device tree. Make an attempt to translate OF node properties into platform_data struct before bailing out. Note that the implementation approach taken differs from other device drivers that make use of device tree information. This is because I2C chips are already registered automatically by of_i2c, so we can get by with a small translator function in the driver. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: kfree(NULL) is legal] Signed-off-by:
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Mike Frysinger authored
The remove member of the spi_driver max7301_driver uses __devexit_p(), so the remove function itself should be marked with __devexit. Even more so considering the probe function is marked with __devinit. Signed-off-by:
Mike Frysinger <vapier@gentoo.org> Acked-by:
Juergen Beisert <j.beisert@pengutronix.de> Cc: Dmitry Baryshkov <dbaryshkov@gmail.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by:
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Daniel Silverstone authored
Add support to the PCA953x driver to use the GPIOLIB naming facility for GPIOs. Signed-off-by:
Daniel Silverstone <dsilvers@simtec.co.uk> Cc: Ben Gardner <bgardner@wabtec.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: David Brownell <david-b@pacbell.net> Signed-off-by:
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Mike Frysinger authored
Blackfin platforms do not support the hardware which this driver drives. Signed-off-by:
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Atsushi Nemoto authored
IRQF_SHARED should not be used with IRQF_DISABLED. There is no in-tree user of this driver and only out-of-tree user I know uses a dedicated irq line for this RTC. Signed-off-by:
Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by:
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Atsushi Nemoto authored
IRQF_SHARED should not be used with IRQF_DISABLED. This RTC have a dedicated irq line to SoC's internal interrupt controller so there is no reason to use IRQF_SHARED. Signed-off-by:
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Wolfgang Grandegger authored
Add support for the Epson RX-8025SA/NB RTC chips. It includes support for alarms, periodic interrupts (1 Hz) and clock precision adjustment. For clock precision adjustment, the SYSFS file "clock_adjust_ppb" gets created in "/sys/class/rtc/rtcX/device". It permits to set and get the clock adjustment in ppb (parts per billion), e.g.: # echo -183000 > /sys/class/rtc/rtc0/device/clock_adjust_ppb # cat /sys/class/rtc/rtc0/device/clock_adjust_ppb -183000 This allows to compensate temperature dependent clock drifts. According to the RX8025 SA/NB application manual the frequency and temperature characteristics can be approximated using the following equation: df = a * (ut - t)**2 df: Frequency deviation in any temperature a : Coefficient = (-35 +-5) * 10**-9 ut: Ultimate temperature in degree = +25 +-5 degree t : Any temperature in degree Signed-off-by:
Wolfgang Grandegger <wg@grandegger.com> Signed-off-by:
Sergei Poselenov <sposelenov@emcraft.com> Signed-off-by:
Yuri Tikhonov <yur@emcraft.com> Signed-off-by:
Dmitry Rakhchev <rda@emcraft.com> Signed-off-by:
Matthias Fuchs <matthias.fuchs@esd.eu> Acked-by:
Jean Delvare <khali@linux-fr.org> Signed-off-by:
Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by:
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Wolfram Sang authored
Add ds3231 variant. For that, the BBSQI bit position was changed from a simple define into a lookup-array as it differs. This also removes writing to an unused bit in case of the ds1337. Signed-off-by:
Wolfram Sang <w.sang@pengutronix.de> Acked-by:
David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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Joakim Tjernlund authored
Extend the ds1307 driver to support ds1388 too. Signed-off-by:
Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by:
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Torsten Ertbjerg Rasmussen authored
The RTC driver for ds1742 / ds1743 uses a static nvram attribute. This patch replaces this static attribute with one nvram attribute for each ds174x registered. The nvram size is not the same for all types of ds174x. The nvram size is accessible as the file size of the nvram attribute in sysfs. With only a single nvram attribute, this file size will be incorrect if more than one type of ds174x is present on a system. See the comment in the removed code below. This patch have been tested with linux-2.6.28 and linux-2.6.29-rc5/6 on a custom board with one ds1743. Signed-off-by:
Torsten Ertbjerg Rasmussen <ertbjerg@gmail.com> Signed-off-by:
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Jiri Pirko authored
Buffer needs not be dma-safe, not rx data length. Signed-off-by:
Jiri Pirko <jpirko@redhat.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by:
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Daniel Ribeiro authored
Commit a7bb3909 ("spi: pxa2xx_spi: introduce chipselect GPIO to simplify the common cases") introduces chipselect GPIO, and configures the CS polarity using SPI_CS_HIGH spi->mode flag. Add SPI_CS_HIGH to the allowed modes. Signed-off-by:
Daniel Ribeiro <drwyrm@gmail.com> Signed-off-by:
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Anton Vorontsov authored
mpc52xx_psc_spi driver is the last user of the legacy activate_cs and deactivate_cs callbacks, so convert the driver to the cs_control hook and remove the legacy callbacks from fsl_spi_platform_data struct. Signed-off-by:
Anton Vorontsov <avorontsov@ru.mvista.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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David Brownell authored
Move some common spi_setup() error checks into the SPI framework from the spi_master controller drivers: - Add a new "mode_bits" field to spi_master - Use that in spi_setup to validate the spi->mode value being requested. Setting this new field is now mandatory for any controller supporting more than vanilla SPI_MODE_0. - Update all spi_master drivers to: * Initialize that field * Remove current spi_setup() checks using that value. This is a net minor code shrink. Signed-off-by: -
David Brownell authored
Start moving some spi_setup() functionality into the SPI core from the various spi_master controller drivers: - Make that function stop being an inline; - Move two common idioms from drivers into that new function: * Default bits_per_word to 8 if that field isn't set * Issue a standardized dev_dbg() message This is a net minor source code shrink, and supports enhancments found in some follow-up patches. Signed-off-by: -
Roel Kluin authored
bfin_spi_flush() returns limit, which reaches -1 upon timeout. but in function bfin_spi_pump_transfers() it is compared with 0. Signed-off-by:
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Stefani Seibold authored
An update for the "Process-Specific Subdirectories" section to reflect the changes till kernel 2.6.30. Signed-off-by:
Stefani Seibold <stefani@seibold.net> Cc: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Cyrill Gorcunov authored
Instead of kmalloc+memset better use straight kzalloc Signed-off-by:
Cyrill Gorcunov <gorcunov@openvz.org> Reviewed-by:
WANG Cong <xiyou.wangcong@gmail.com> Acked-by:
Vivek Goyal <vgoyal@redhat.com> Signed-off-by:
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