- 16 Sep, 2013 6 commits
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Miklos Szeredi authored
If O_CREAT|O_EXCL are passed to open, then we know that either - the file is successfully created, or - the operation fails in some way. So previously we set FILE_CREATED before calling ->atomic_open() so the filesystem doesn't have to. This, however, led to bugs in the implementation that went unnoticed when the filesystem didn't check for existence, yet returned success. To prevent this kind of bug, require filesystems to always explicitly set FILE_CREATED on O_CREAT|O_EXCL and verify this in the VFS. Also added a couple more verifications for the result of atomic_open(): - Warn if filesystem set FILE_CREATED despite the lack of O_CREAT. - Warn if filesystem set FILE_CREATED but gave a negative dentry. Signed-off-by:
Miklos Szeredi <mszeredi@suse.cz> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Miklos Szeredi authored
Set FILE_CREATED on O_CREAT|O_EXCL. If the NFS server honored our request for exclusivity then this must be correct. Currently this is a no-op, since the VFS sets FILE_CREATED anyway. The next patch will, however, require this flag to be always set by filesystems. Signed-off-by:
Miklos Szeredi <mszeredi@suse.cz> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Miklos Szeredi authored
In gfs2_create_inode() set FILE_CREATED in *opened. Signed-off-by:
Miklos Szeredi <mszeredi@suse.cz> Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Miklos Szeredi authored
If an error occurs after having called finish_open() then fput() needs to be called on the already opened file. Signed-off-by:
Miklos Szeredi <mszeredi@suse.cz> Cc: Steve French <sfrench@samba.org> Cc: stable@vger.kernel.org Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Miklos Szeredi authored
Fix documentation of ->atomic_open() and related functions: finish_open() and finish_no_open(). Also add details that seem to be unclear and a source of bugs (some of which are fixed in the following series). Cc-ing maintainers of all filesystems implementing ->atomic_open(). Signed-off-by:
Miklos Szeredi <mszeredi@suse.cz> Cc: Eric Van Hensbergen <ericvh@gmail.com> Cc: Sage Weil <sage@inktank.com> Cc: Steve French <sfrench@samba.org> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk>
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Al Viro authored
Don't drop ->wq_mutex before calling autofs4_notify_daemon() only to regain it there. Besides being pointless, that opens a race window where autofs4_wait_release() could've come and freed wq->name.name. And do the debugging printk in the "reused an existing wq" case before dropping ->wq_mutex - the same reason... Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Acked-by:
Ian Kent <raven@themaw.net>
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- 14 Sep, 2013 2 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linuxLinus Torvalds authored
Pull writeback fix from Wu Fengguang: "A trivial writeback fix" * tag 'writeback-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux: writeback: Do not sort b_io list only because of block device inode
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Linus Torvalds authored
The LRU list changes interacted badly with our nr_dentry_unused accounting, and even worse with the new DCACHE_LRU_LIST bit logic. This introduces helper functions to make sure everything follows the proper dcache d_lru list rules: the dentry cache is complicated by the fact that some of the hotpaths don't even want to look at the LRU list at all, and the fact that we use the same list entry in the dentry for both the LRU list and for our temporary shrinking lists when removing things from the LRU. The helper functions temporarily have some extra sanity checking for the flag bits that have to match the current LRU state of the dentry. We'll remove that before the final 3.12 release, but considering how easy it is to get wrong, this first cleanup version has some very particular sanity checking. Acked-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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- 13 Sep, 2013 16 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-stagingLinus Torvalds authored
Pull hwmon fixes from Guenter Roeck: "Some more low risk cleanup patches: - Remove unnecessary pci_set_drvdata in k10temp driver from Jingoo Han - Fix return values in several drivers from Sachin Kamat - Remove redundant break in amc6821 driver from Sachin Kamat" * tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: hwmon: (k10temp) remove unnecessary pci_set_drvdata() hwmon: (tmp421) Fix return value hwmon: (amc6821) Remove redundant break hwmon: (amc6821) Fix return value hwmon: (ibmaem) Fix return value hwmon: (emc2103) Fix return value
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git://github.com/czankel/xtensa-linuxLinus Torvalds authored
Pull Xtensa updates from Chris Zankel. * tag 'xtensa-next-20130912' of git://github.com/czankel/xtensa-linux: xtensa: Fix broken allmodconfig build xtensa: remove CCOUNT_PER_JIFFY xtensa: fix !CONFIG_XTENSA_CALIBRATE_CCOUNT build failure xtensa: don't use echo -e needlessly xtensa: new fast_alloca handler xtensa: keep a3 and excsave1 on entry to exception handlers xtensa: enable kernel preemption xtensa: check thread flags atomically on return from user exception
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git://git.kvack.org/~bcrl/aio-nextLinus Torvalds authored
Pull aio changes from Ben LaHaise: "First off, sorry for this pull request being late in the merge window. Al had raised a couple of concerns about 2 items in the series below. I addressed the first issue (the race introduced by Gu's use of mm_populate()), but he has not provided any further details on how he wants to rework the anon_inode.c changes (which were sent out months ago but have yet to be commented on). The bulk of the changes have been sitting in the -next tree for a few months, with all the issues raised being addressed" * git://git.kvack.org/~bcrl/aio-next: (22 commits) aio: rcu_read_lock protection for new rcu_dereference calls aio: fix race in ring buffer page lookup introduced by page migration support aio: fix rcu sparse warnings introduced by ioctx table lookup patch aio: remove unnecessary debugging from aio_free_ring() aio: table lookup: verify ctx pointer staging/lustre: kiocb->ki_left is removed aio: fix error handling and rcu usage in "convert the ioctx list to table lookup v3" aio: be defensive to ensure request batching is non-zero instead of BUG_ON() aio: convert the ioctx list to table lookup v3 aio: double aio_max_nr in calculations aio: Kill ki_dtor aio: Kill ki_users aio: Kill unneeded kiocb members aio: Kill aio_rw_vect_retry() aio: Don't use ctx->tail unnecessarily aio: io_cancel() no longer returns the io_event aio: percpu ioctx refcount aio: percpu reqs_available aio: reqs_active -> reqs_available aio: fix build when migration is disabled ...
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linuxLinus Torvalds authored
Pull generic hardirq option removal from Martin Schwidefsky: "All architectures now use generic hardirqs, s390 has been last to switch. With that the code under !CONFIG_GENERIC_HARDIRQS and the related HAVE_GENERIC_HARDIRQS and GENERIC_HARDIRQS config options can be removed. Yay!" * 'genirq' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: Remove GENERIC_HARDIRQ config option
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git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuildLinus Torvalds authored
Pull kconfig fix from Michal Marek: "This is a fix for a regression caused by my previous pull request. A sed command in scripts/config that used colons as separator was accidentally changed to use slashes, which fails when you use slashes in a value. Changing it back to colons is of course not a proper fix, but at least it will be broken in the same way it had been for four years. A proper fix is pending" * 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: scripts/config: fix variable substitution command
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Linus Torvalds authored
Merge tag 'blackfin-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux Pull blackfin updates from Steven Miao. * tag 'blackfin-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/realmz6/blackfin-linux: blackfin: Ignore generated uImages blackfin: Add STMMAC platform data to enable dwmac1000 driver on BF60x. bf609: adv7343: add S-Video and Component output support bf609: add adv7343 video encoder support clock: add stmmac clock for ethernet driver blackfin: scb: Add SCB1 to SCB9 config options and data. blackfin: scb: Add system crossbar init code.
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds authored
Pull crypto fixes from Herbert Xu: "This fixes a 7+ year race condition in the crypto API that causes sporadic crashes when multiple threads load the same algorithm. It also fixes the crct10dif algorithm again to prevent boot failures on systems where the initramfs tool ignores module softdeps" * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: crct10dif - Add fallback for broken initrds crypto: api - Fix race condition in larval lookup
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Martin Schwidefsky authored
After the last architecture switched to generic hard irqs the config options HAVE_GENERIC_HARDIRQS & GENERIC_HARDIRQS and the related code for !CONFIG_GENERIC_HARDIRQS can be removed. Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com>
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Clement Chauplannaz authored
Commit 229455bc02b87f7128f190c4491b4ceffff38648 accidentally changed the separator between sed `s' command and its parameters from ':' to '/'. Revert this change. Reported-and-tested-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
Clement Chauplannaz <chauplac@gmail.com> Signed-off-by:
Michal Marek <mmarek@suse.cz>
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Mark Brown authored
We have the build infrastructure to generate uImages so we should ignore the resulting generated files. Signed-off-by:
Mark Brown <broonie@linaro.org> Acked-by:
Mike Frysinger <vapier@gentoo.org>
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Sonic Zhang authored
- Enable GMAC - Set propler DMA PBL - Disable DMA store and forward mode - Select PTP input clock from MII clock. Signed-off-by:
Sonic Zhang <sonic.zhang@analog.com> Signed-off-by:
Steven Miao <realmz6@gmail.com>
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Scott Jiang authored
Signed-off-by:
Scott Jiang <scott.jiang.linux@gmail.com>
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Scott Jiang authored
Signed-off-by:
Scott Jiang <scott.jiang.linux@gmail.com>
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Steven Miao authored
Signed-off-by:
Steven Miao <realmz6@gmail.com>
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Sonic Zhang authored
Signed-off-by:
Sonic Zhang <sonic.zhang@analog.com>
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Steven Miao authored
If SCB exists in select blackfin cpu, developer can change the SCB priority in kernel configuration. Signed-off-by:
Sonic Zhang <sonic.zhang@analog.com> Signed-off-by:
Steven Miao <realmz6@gmail.com>
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- 12 Sep, 2013 16 commits
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git://git.linux-mips.org/pub/scm/ralf/upstream-linusLinus Torvalds authored
Pull MIPS updates from Ralf Baechle: "This has been sitting in -next for a while with no objections and all MIPS defconfigs except one are building fine; that one platform got broken by another patch in your tree and I'm going to submit a patch separately. - a handful of fixes that didn't make 3.11 - a few bits of Octeon 3 support with more to come for a later release - platform enhancements for Octeon, ath79, Lantiq, Netlogic and Ralink SOCs - a GPIO driver for the Octeon - some dusting off of the DECstation code - the usual dose of cleanups" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (65 commits) MIPS: DMA: Fix BUG due to smp_processor_id() in preemptible code MIPS: kexec: Fix random crashes while loading crashkernel MIPS: kdump: Skip walking indirection page for crashkernels MIPS: DECstation HRT calibration bug fixes MIPS: Export copy_from_user_page() (needed by lustre) MIPS: Add driver for the built-in PCI controller of the RT3883 SoC MIPS: DMA: For BMIPS5000 cores flush region just like non-coherent R10000 MIPS: ralink: Add support for reset-controller API MIPS: ralink: mt7620: Add cpu-feature-override header MIPS: ralink: mt7620: Add spi clock definition MIPS: ralink: mt7620: Add wdt clock definition MIPS: ralink: mt7620: Improve clock frequency detection MIPS: ralink: mt7620: This SoC has EHCI and OHCI hosts MIPS: ralink: mt7620: Add verbose ram info MIPS: ralink: Probe clocksources from OF MIPS: ralink: Add support for systick timer found on newer ralink SoC MIPS: ralink: Add support for periodic timer irq MIPS: Netlogic: Built-in DTB for XLP2xx SoC boards MIPS: Netlogic: Add support for USB on XLP2xx MIPS: Netlogic: XLP2xx update for I2C controller ...
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git://oss.sgi.com/xfs/xfsLinus Torvalds authored
Pull xfs update #2 from Ben Myers: "Here we have defrag support for v5 superblock, a number of bugfixes and a cleanup or two. - defrag support for CRC filesystems - fix endian worning in xlog_recover_get_buf_lsn - fixes for sparse warnings - fix for assert in xfs_dir3_leaf_hdr_from_disk - fix for log recovery of remote symlinks - fix for log recovery of btree root splits - fixes formemory allocation failures with ACLs - fix for assert in xfs_buf_item_relse - fix for assert in xfs_inode_buf_verify - fix an assignment in an assert that should be a test in xfs_bmbt_change_owner - remove dead code in xlog_recover_inode_pass2" * tag 'xfs-for-linus-v3.12-rc1-2' of git://oss.sgi.com/xfs/xfs: xfs: remove dead code from xlog_recover_inode_pass2 xfs: = vs == typo in ASSERT() xfs: don't assert fail on bad inode numbers xfs: aborted buf items can be in the AIL. xfs: factor all the kmalloc-or-vmalloc fallback allocations xfs: fix memory allocation failures with ACLs xfs: ensure we copy buffer type in da btree root splits xfs: set remote symlink buffer type for recovery xfs: recovery of swap extents operations for CRC filesystems xfs: swap extents operations for CRC filesystems xfs: check magic numbers in dir3 leaf verifier first xfs: fix some minor sparse warnings xfs: fix endian warning in xlog_recover_get_buf_lsn()
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git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pendingLinus Torvalds authored
Pull SCSI target updates from Nicholas Bellinger: "Lots of activity again this round for I/O performance optimizations (per-cpu IDA pre-allocation for vhost + iscsi/target), and the addition of new fabric independent features to target-core (COMPARE_AND_WRITE + EXTENDED_COPY). The main highlights include: - Support for iscsi-target login multiplexing across individual network portals - Generic Per-cpu IDA logic (kent + akpm + clameter) - Conversion of vhost to use per-cpu IDA pre-allocation for descriptors, SGLs and userspace page pointer list - Conversion of iscsi-target + iser-target to use per-cpu IDA pre-allocation for descriptors - Add support for generic COMPARE_AND_WRITE (AtomicTestandSet) emulation for virtual backend drivers - Add support for generic EXTENDED_COPY (CopyOffload) emulation for virtual backend drivers. - Add support for fast memory registration mode to iser-target (Vu) The patches to add COMPARE_AND_WRITE and EXTENDED_COPY support are of particular significance, which make us the first and only open source target to support the full set of VAAI primitives. Currently Linux clients are lacking upstream support to actually utilize these primitives. However, with server side support now in place for folks like MKP + ZAB working on the client, this logic once reserved for the highest end of storage arrays, can now be run in VMs on their laptops" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (50 commits) target/iscsi: Bump versions to v4.1.0 target: Update copyright ownership/year information to 2013 iscsi-target: Bump default TCP listen backlog to 256 target: Fix >= v3.9+ regression in PR APTPL + ALUA metadata write-out iscsi-target; Bump default CmdSN Depth to 64 iscsi-target: Remove unnecessary wait_for_completion in iscsi_get_thread_set iscsi-target: Add thread_set->ts_activate_sem + use common deallocate iscsi-target: Fix race with thread_pre_handler flush_signals + ISCSI_THREAD_SET_DIE target: remove unused including <linux/version.h> iser-target: introduce fast memory registration mode (FRWR) iser-target: generalize rdma memory registration and cleanup iser-target: move rdma wr processing to a shared function target: Enable global EXTENDED_COPY setup/release target: Add Third Party Copy (3PC) bit in INQUIRY response target: Enable EXTENDED_COPY setup in spc_parse_cdb target: Add support for EXTENDED_COPY copy offload emulation target: Avoid non-existent tg_pt_gp_mem in target_alua_state_check target: Add global device list for EXTENDED_COPY target: Make helpers non static for EXTENDED_COPY command setup target: Make spc_parse_naa_6h_vendor_specific non static ...
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Linus Torvalds authored
Merge more patches from Andrew Morton: "The rest of MM. Plus one misc cleanup" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (35 commits) mm/Kconfig: add MMU dependency for MIGRATION. kernel: replace strict_strto*() with kstrto*() mm, thp: count thp_fault_fallback anytime thp fault fails thp: consolidate code between handle_mm_fault() and do_huge_pmd_anonymous_page() thp: do_huge_pmd_anonymous_page() cleanup thp: move maybe_pmd_mkwrite() out of mk_huge_pmd() mm: cleanup add_to_page_cache_locked() thp: account anon transparent huge pages into NR_ANON_PAGES truncate: drop 'oldsize' truncate_pagecache() parameter mm: make lru_add_drain_all() selective memcg: document cgroup dirty/writeback memory statistics memcg: add per cgroup writeback pages accounting memcg: check for proper lock held in mem_cgroup_update_page_stat memcg: remove MEMCG_NR_FILE_MAPPED memcg: reduce function dereference memcg: avoid overflow caused by PAGE_ALIGN memcg: rename RESOURCE_MAX to RES_COUNTER_MAX memcg: correct RESOURCE_MAX to ULLONG_MAX mm: memcg: do not trap chargers with full callstack on OOM mm: memcg: rework and document OOM waiting and wakeup ...
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Chen Gang authored
MIGRATION must depend on MMU, or allmodconfig for the nommu sh architecture fails to build: CC mm/migrate.o mm/migrate.c: In function 'remove_migration_pte': mm/migrate.c:134:3: error: implicit declaration of function 'pmd_trans_huge' [-Werror=implicit-function-declaration] if (pmd_trans_huge(*pmd)) ^ mm/migrate.c:149:2: error: implicit declaration of function 'is_swap_pte' [-Werror=implicit-function-declaration] if (!is_swap_pte(pte)) ^ ... Also let CMA depend on MMU, or when NOMMU, if we select CMA, it will select MIGRATION by force. Signed-off-by:
Chen Gang <gang.chen@asianux.com> Reviewed-by:
Michal Hocko <mhocko@suse.cz> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Jingoo Han authored
The usage of strict_strto*() is not preferred, because strict_strto*() is obsolete. Thus, kstrto*() should be used. Signed-off-by:
Jingoo Han <jg1.han@samsung.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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David Rientjes authored
Currently, thp_fault_fallback in vmstat only gets incremented if a hugepage allocation fails. If current's memcg hits its limit or the page fault handler returns an error, it is incorrectly accounted as a successful thp_fault_alloc. Count thp_fault_fallback anytime the page fault handler falls back to using regular pages and only count thp_fault_alloc when a hugepage has actually been faulted. Signed-off-by:
David Rientjes <rientjes@google.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Kirill A. Shutemov authored
do_huge_pmd_anonymous_page() has copy-pasted piece of handle_mm_fault() to handle fallback path. Let's consolidate code back by introducing VM_FAULT_FALLBACK return code. Signed-off-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by:
Hillf Danton <dhillf@gmail.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Hugh Dickins <hughd@google.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Jan Kara <jack@suse.cz> Cc: Mel Gorman <mgorman@suse.de> Cc: Andi Kleen <ak@linux.intel.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Kirill A. Shutemov authored
Minor cleanup: unindent most code of the fucntion by inverting one condition. It's preparation for the next patch. No functional changes. Signed-off-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by:
Hillf Danton <dhillf@gmail.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Hugh Dickins <hughd@google.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Jan Kara <jack@suse.cz> Cc: Mel Gorman <mgorman@suse.de> Cc: Andi Kleen <ak@linux.intel.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Kirill A. Shutemov authored
It's confusing that mk_huge_pmd() has semantics different from mk_pte() or mk_pmd(). I spent some time on debugging issue cased by this inconsistency. Let's move maybe_pmd_mkwrite() out of mk_huge_pmd() and adjust prototype to match mk_pte(). Signed-off-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by:
Dave Hansen <dave.hansen@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Hugh Dickins <hughd@google.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Jan Kara <jack@suse.cz> Cc: Mel Gorman <mgorman@suse.de> Cc: Andi Kleen <ak@linux.intel.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Hillf Danton <dhillf@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Kirill A. Shutemov authored
Make add_to_page_cache_locked() cleaner: - unindent most code of the function by inverting one condition; - streamline code no-error path; - move insert error path outside normal code path; - call radix_tree_preload_end() earlier; No functional changes. Signed-off-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by:
Dave Hansen <dave.hansen@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Hugh Dickins <hughd@google.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Jan Kara <jack@suse.cz> Cc: Mel Gorman <mgorman@suse.de> Cc: Andi Kleen <ak@linux.intel.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Hillf Danton <dhillf@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Kirill A. Shutemov authored
We use NR_ANON_PAGES as base for reporting AnonPages to user. There's not much sense in not accounting transparent huge pages there, but add them on printing to user. Let's account transparent huge pages in NR_ANON_PAGES in the first place. Signed-off-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by:
Dave Hansen <dave.hansen@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Hugh Dickins <hughd@google.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Jan Kara <jack@suse.cz> Cc: Mel Gorman <mgorman@suse.de> Cc: Andi Kleen <ak@linux.intel.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Hillf Danton <dhillf@gmail.com> Cc: Ning Qu <quning@google.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Kirill A. Shutemov authored
truncate_pagecache() doesn't care about old size since commit cedabed4 ("vfs: Fix vmtruncate() regression"). Let's drop it. Signed-off-by:
Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Chris Metcalf authored
make lru_add_drain_all() only selectively interrupt the cpus that have per-cpu free pages that can be drained. This is important in nohz mode where calling mlockall(), for example, otherwise will interrupt every core unnecessarily. This is important on workloads where nohz cores are handling 10 Gb traffic in userspace. Those CPUs do not enter the kernel and place pages into LRU pagevecs and they really, really don't want to be interrupted, or they drop packets on the floor. Signed-off-by:
Chris Metcalf <cmetcalf@tilera.com> Reviewed-by:
Tejun Heo <tj@kernel.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Sha Zhengju authored
Signed-off-by:
Sha Zhengju <handai.szj@taobao.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Greg Thelen <gthelen@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Sha Zhengju authored
Add memcg routines to count writeback pages, later dirty pages will also be accounted. After Kame's commit 89c06bd5 ("memcg: use new logic for page stat accounting"), we can use 'struct page' flag to test page state instead of per page_cgroup flag. But memcg has a feature to move a page from a cgroup to another one and may have race between "move" and "page stat accounting". So in order to avoid the race we have designed a new lock: mem_cgroup_begin_update_page_stat() modify page information -->(a) mem_cgroup_update_page_stat() -->(b) mem_cgroup_end_update_page_stat() It requires both (a) and (b)(writeback pages accounting) to be pretected in mem_cgroup_{begin/end}_update_page_stat(). It's full no-op for !CONFIG_MEMCG, almost no-op if memcg is disabled (but compiled in), rcu read lock in the most cases (no task is moving), and spin_lock_irqsave on top in the slow path. There're two writeback interfaces to modify: test_{clear/set}_page_writeback(). And the lock order is: --> memcg->move_lock --> mapping->tree_lock Signed-off-by:
Sha Zhengju <handai.szj@taobao.com> Acked-by:
Michal Hocko <mhocko@suse.cz> Reviewed-by:
Greg Thelen <gthelen@google.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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