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linux-stable/fs/xfs/kmem.c

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xfs: convert to SPDX license tags Remove the verbose license text from XFS files and replace them with SPDX tags. This does not change the license of any of the code, merely refers to the common, up-to-date license files in LICENSES/ This change was mostly scripted. fs/xfs/Makefile and fs/xfs/libxfs/xfs_fs.h were modified by hand, the rest were detected and modified by the following command: for f in `git grep -l "GNU General" fs/xfs/` ; do echo $f cat $f | awk -f hdr.awk > $f.new mv -f $f.new $f done And the hdr.awk script that did the modification (including detecting the difference between GPL-2.0 and GPL-2.0+ licenses) is as follows: $ cat hdr.awk BEGIN { hdr = 1.0 tag = "GPL-2.0" str = "" } /^ \* This program is free software/ { hdr = 2.0; next } /any later version./ { tag = "GPL-2.0+" next } /^ \*\// { if (hdr > 0.0) { print "// SPDX-License-Identifier: " tag print str print $0 str="" hdr = 0.0 next } print $0 next } /^ \* / { if (hdr > 1.0) next if (hdr > 0.0) { if (str != "") str = str "\n" str = str $0 next } print $0 next } /^ \*/ { if (hdr > 0.0) next print $0 next } // { if (hdr > 0.0) { if (str != "") str = str "\n" str = str $0 next } print $0 } END { } $ Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2018-06-06 02:42:14 +00:00
// SPDX-License-Identifier: GPL-2.0
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
/*
[XFS] Update license/copyright notices to match the prefered SGI boilerplate. SGI-PV: 913862 SGI-Modid: xfs-linux:xfs-kern:23903a Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-11-02 03:58:39 +00:00
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
*/
xfs: add kmem allocation trace points When trying to correlate XFS kernel allocations to memory reclaim behaviour, it is useful to know what allocations XFS is actually attempting. This information is not directly available from tracepoints in the generic memory allocation and reclaim tracepoints, so these new trace points provide a high level indication of what the XFS memory demand actually is. There is no per-filesystem context in this code, so we just trace the type of allocation, the size and the allocation constraints. The kmem code also doesn't include much of the common XFS headers, so there are a few definitions that need to be added to the trace headers and a couple of types that need to be made common to avoid needing to include the whole world in the kmem code. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-08-26 19:08:10 +00:00
#include "xfs.h"
xfs: Convert linux-2.6/ files to new logging interface Convert the files in fs/xfs/linux-2.6/ to use the new xfs_<level> logging format that replaces the old Irix inherited cmn_err() interfaces. While there, also convert naked printk calls to use the relevant xfs logging function to standardise output format. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2011-03-06 23:00:35 +00:00
#include "xfs_message.h"
xfs: add kmem allocation trace points When trying to correlate XFS kernel allocations to memory reclaim behaviour, it is useful to know what allocations XFS is actually attempting. This information is not directly available from tracepoints in the generic memory allocation and reclaim tracepoints, so these new trace points provide a high level indication of what the XFS memory demand actually is. There is no per-filesystem context in this code, so we just trace the type of allocation, the size and the allocation constraints. The kmem code also doesn't include much of the common XFS headers, so there are a few definitions that need to be added to the trace headers and a couple of types that need to be made common to avoid needing to include the whole world in the kmem code. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-08-26 19:08:10 +00:00
#include "xfs_trace.h"
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
void *
xfs: switch to proper __bitwise type for KM_... flags Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-04-02 10:24:04 +00:00
kmem_alloc(size_t size, xfs_km_flags_t flags)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
{
[PATCH] gfp_t: fs/* - ->releasepage() annotated (s/int/gfp_t), instances updated - missing gfp_t in fs/* added - fixed misannotation from the original sweep caught by bitwise checks: XFS used __nocast both for gfp_t and for flags used by XFS allocator. The latter left with unsigned int __nocast; we might want to add a different type for those but for now let's leave them alone. That, BTW, is a case when __nocast use had been actively confusing - it had been used in the same code for two different and similar types, with no way to catch misuses. Switch of gfp_t to bitwise had caught that immediately... One tricky bit is left alone to be dealt with later - mapping->flags is a mix of gfp_t and error indications. Left alone for now. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-10-21 07:20:48 +00:00
int retries = 0;
gfp_t lflags = kmem_flags_convert(flags);
void *ptr;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
xfs: add kmem allocation trace points When trying to correlate XFS kernel allocations to memory reclaim behaviour, it is useful to know what allocations XFS is actually attempting. This information is not directly available from tracepoints in the generic memory allocation and reclaim tracepoints, so these new trace points provide a high level indication of what the XFS memory demand actually is. There is no per-filesystem context in this code, so we just trace the type of allocation, the size and the allocation constraints. The kmem code also doesn't include much of the common XFS headers, so there are a few definitions that need to be added to the trace headers and a couple of types that need to be made common to avoid needing to include the whole world in the kmem code. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-08-26 19:08:10 +00:00
trace_kmem_alloc(size, flags, _RET_IP_);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
do {
xfs: replace KM_LARGE with explicit vmalloc use We use the KM_LARGE flag to make kmem_alloc and friends use vmalloc if necessary. As we only need this for a few boot/mount time allocations just switch to explicit vmalloc calls there. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
2010-01-20 21:55:30 +00:00
ptr = kmalloc(size, lflags);
fs: xfs: Remove KM_NOSLEEP and KM_SLEEP. Since no caller is using KM_NOSLEEP and no callee branches on KM_SLEEP, we can remove KM_NOSLEEP and replace KM_SLEEP with 0. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-08-26 19:06:22 +00:00
if (ptr || (flags & KM_MAYFAIL))
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
return ptr;
if (!(++retries % 100))
xfs: Convert linux-2.6/ files to new logging interface Convert the files in fs/xfs/linux-2.6/ to use the new xfs_<level> logging format that replaces the old Irix inherited cmn_err() interfaces. While there, also convert naked printk calls to use the relevant xfs logging function to standardise output format. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2011-03-06 23:00:35 +00:00
xfs_err(NULL,
xfs: more info from kmem deadlocks and high-level error msgs In an effort to get more useful out of "possible memory allocation deadlock" messages, print the size of the requested allocation, and dump the stack if the xfs error level is tuned high. The stack dump is implemented in define_xfs_printk_level() for error levels >= LOGLEVEL_ERR, partly because it seems generically useful, and also because kmem.c has no knowledge of xfs error level tunables or other such bits, it's very kmem-specific. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2015-10-12 05:04:45 +00:00
"%s(%u) possible memory allocation deadlock size %u in %s (mode:0x%x)",
xfs: Print name and pid when memory allocation loops This patch adds comm name and pid to warning messages printed by kmem_alloc(), kmem_zone_alloc() and xfs_buf_allocate_memory(). This will help telling which memory allocations (e.g. kernel worker threads, OOM victim tasks, neither) are stalling because these functions are passing __GFP_NOWARN which suppresses not only backtrace but comm name and pid. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2015-10-12 04:41:29 +00:00
current->comm, current->pid,
xfs: more info from kmem deadlocks and high-level error msgs In an effort to get more useful out of "possible memory allocation deadlock" messages, print the size of the requested allocation, and dump the stack if the xfs error level is tuned high. The stack dump is implemented in define_xfs_printk_level() for error levels >= LOGLEVEL_ERR, partly because it seems generically useful, and also because kmem.c has no knowledge of xfs error level tunables or other such bits, it's very kmem-specific. Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
2015-10-12 05:04:45 +00:00
(unsigned int)size, __func__, lflags);
mm: introduce memalloc_retry_wait() Various places in the kernel - largely in filesystems - respond to a memory allocation failure by looping around and re-trying. Some of these cannot conveniently use __GFP_NOFAIL, for reasons such as: - a GFP_ATOMIC allocation, which __GFP_NOFAIL doesn't work on - a need to check for the process being signalled between failures - the possibility that other recovery actions could be performed - the allocation is quite deep in support code, and passing down an extra flag to say if __GFP_NOFAIL is wanted would be clumsy. Many of these currently use congestion_wait() which (in almost all cases) simply waits the given timeout - congestion isn't tracked for most devices. It isn't clear what the best delay is for loops, but it is clear that the various filesystems shouldn't be responsible for choosing a timeout. This patch introduces memalloc_retry_wait() with takes on that responsibility. Code that wants to retry a memory allocation can call this function passing the GFP flags that were used. It will wait however is appropriate. For now, it only considers __GFP_NORETRY and whatever gfpflags_allow_blocking() tests. If blocking is allowed without __GFP_NORETRY, then alloc_page either made some reclaim progress, or waited for a while, before failing. So there is no need for much further waiting. memalloc_retry_wait() will wait until the current jiffie ends. If this condition is not met, then alloc_page() won't have waited much if at all. In that case memalloc_retry_wait() waits about 200ms. This is the delay that most current loops uses. linux/sched/mm.h needs to be included in some files now, but linux/backing-dev.h does not. Link: https://lkml.kernel.org/r/163754371968.13692.1277530886009912421@noble.neil.brown.name Signed-off-by: NeilBrown <neilb@suse.de> Cc: Dave Chinner <david@fromorbit.com> Cc: Michal Hocko <mhocko@suse.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Jaegeuk Kim <jaegeuk@kernel.org> Cc: Chao Yu <chao@kernel.org> Cc: Darrick J. Wong <djwong@kernel.org> Cc: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-14 22:07:14 +00:00
memalloc_retry_wait(lflags);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
} while (1);
}