Commit f49169c97f ("NFSD: Remove svc_serv_ops::svo_module") removed
calls to module_put_and_kthread_exit() from threads that acted as SUNRPC
servers and had a related svc_serv_ops structure. This was correct.
It ALSO removed the module_put_and_kthread_exit() call from
nfs4_run_state_manager() which is NOT a SUNRPC service.
Consequently every time the NFSv4 state manager runs the module count
increments and won't be decremented. So the nfsv4 module cannot be
unloaded.
So restore the module_put_and_kthread_exit() call.
Fixes: f49169c97f ("NFSD: Remove svc_serv_ops::svo_module")
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
io_import_iovec uses the s pointer, but this was changed immediately
after the iovec was re-imported and so it was imported into the wrong
place.
Change the ordering.
Fixes: 2be2eb02e2 ("io_uring: ensure reads re-import for selected buffers")
Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220630132006.2825668-1-dylany@fb.com
[axboe: ensure we don't half-import as well]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
It is unnecessary to check and set did_zero value in while() loop
in dax_zero_iter(), we can set did_zero to true only when zeroing
successfully at last.
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
It is unnecessary to check and set did_zero value in while() loop
in iomap_zero_iter(), we can set did_zero to true only when zeroing
successfully at last.
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Pull fanotify fix from Jan Kara:
"A fix for recently added fanotify API to have stricter checks and
refuse some invalid flag combinations to make our life easier in the
future"
* tag 'fsnotify_for_v5.19-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
fanotify: refine the validation checks on non-dir inode mask
iomap_do_writepage() sends pages past i_size through
folio_redirty_for_writepage(), which normally isn't a problem because
truncate and friends clean them very quickly.
When the system has cgroups configured, we can end up in situations
where one cgroup has almost no dirty pages at all, and other cgroups
consume the entire background dirty limit. This is especially common in
our XFS workloads in production because they have cgroups using O_DIRECT
for almost all of the IO mixed in with cgroups that do more traditional
buffered IO work.
We've hit storms where the redirty path hits millions of times in a few
seconds, on all a single file that's only ~40 pages long. This leads to
long tail latencies for file writes because the pdflush workers are
hogging the CPU from some kworkers bound to the same CPU.
Reproducing this on 5.18 was tricky because 869ae85dae ("xfs: flush new
eof page on truncate...") ends up writing/waiting most of these dirty pages
before truncate gets a chance to wait on them.
The actual repro looks like this:
/*
* run me in a cgroup all alone. Start a second cgroup with dd
* streaming IO into the block device.
*/
int main(int ac, char **av) {
int fd;
int ret;
char buf[BUFFER_SIZE];
char *filename = av[1];
memset(buf, 0, BUFFER_SIZE);
if (ac != 2) {
fprintf(stderr, "usage: looper filename\n");
exit(1);
}
fd = open(filename, O_WRONLY | O_CREAT, 0600);
if (fd < 0) {
err(errno, "failed to open");
}
fprintf(stderr, "looping on %s\n", filename);
while(1) {
/*
* skip past page 0 so truncate doesn't write and wait
* on our extent before changing i_size
*/
ret = lseek(fd, 8192, SEEK_SET);
if (ret < 0)
err(errno, "lseek");
ret = write(fd, buf, BUFFER_SIZE);
if (ret != BUFFER_SIZE)
err(errno, "write failed");
/* start IO so truncate has to wait after i_size is 0 */
ret = sync_file_range(fd, 16384, 4095, SYNC_FILE_RANGE_WRITE);
if (ret < 0)
err(errno, "sync_file_range");
ret = ftruncate(fd, 0);
if (ret < 0)
err(errno, "truncate");
usleep(1000);
}
}
And this bpftrace script will show when you've hit a redirty storm:
kretprobe:xfs_vm_writepages {
delete(@dirty[pid]);
}
kprobe:xfs_vm_writepages {
@dirty[pid] = 1;
}
kprobe:folio_redirty_for_writepage /@dirty[pid] > 0/ {
$inode = ((struct folio *)arg1)->mapping->host->i_ino;
@inodes[$inode] = count();
@redirty++;
if (@redirty > 90000) {
printf("inode %d redirty was %d", $inode, @redirty);
exit();
}
}
This patch has the same number of failures on xfstests as unpatched 5.18:
Failures: generic/648 xfs/019 xfs/050 xfs/168 xfs/299 xfs/348 xfs/506
xfs/543
I also ran it through a long stress of multiple fsx processes hammering.
(Johannes Weiner did significant tracing and debugging on this as well)
Signed-off-by: Chris Mason <clm@fb.com>
Co-authored-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Johannes Weiner <hannes@cmpxchg.org>
Reported-by: Domas Mituzas <domas@fb.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
We waste a u64 SQE field for flags even though we don't need as many
bits and it can be used for something more useful later. Store io_uring
specific send/recv flags in sqe->ioprio instead of ->addr2.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Fixes: 0455d4ccec ("io_uring: add POLL_FIRST support for send/sendmsg and recv/recvmsg")
[axboe: change comment in io_uring.h as well]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Pull ksmbd server fixes from Steve French:
- seek null check (don't use f_seek op directly and blindly)
- offset validation in FSCTL_SET_ZERO_DATA
- fallocate fix (relates e.g. to xfstests generic/091 and 263)
- two cleanup fixes
- fix socket settings on some arch
* tag '5.19-rc4-ksmbd-server-fixes' of git://git.samba.org/ksmbd:
ksmbd: use vfs_llseek instead of dereferencing NULL
ksmbd: check invalid FileOffset and BeyondFinalZero in FSCTL_ZERO_DATA
ksmbd: set the range of bytes to zero without extending file size in FSCTL_ZERO_DATA
ksmbd: remove duplicate flag set in smb2_write
ksmbd: smbd: Remove useless license text when SPDX-License-Identifier is already used
ksmbd: use SOCK_NONBLOCK type for kernel_accept()
Currently, we'll call ceph_check_caps, but if we're still waiting
on the reply, we'll end up spinning around on the same inode in
flush_dirty_session_caps. Wait for the async create reply before
flushing caps.
Cc: stable@vger.kernel.org
URL: https://tracker.ceph.com/issues/55823
Fixes: fbed7045f5 ("ceph: wait for async create reply before sending any cap messages")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
On a system with a realtime volume and a 28k realtime extent,
generic/491 fails because the test opens a file on a frozen filesystem
and closing it causes xfs_release -> xfs_can_free_eofblocks to
mistakenly think that the the blocks of the realtime extent beyond EOF
are posteof blocks to be freed. Realtime extents cannot be partially
unmapped, so this is pointless. Worse yet, this triggers posteof
cleanup, which stalls on a transaction allocation, which is why the test
fails.
Teach the predicate to account for realtime extents properly.
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Now that we've established (again!) that empty xattr leaf buffers are
ok, we no longer need to bhold them to transactions when we're creating
new leaf blocks. Get rid of the entire mechanism, which should simplify
the xattr code quite a bit.
The original justification for using bhold here was to prevent the AIL
from trying to write the empty leaf block into the fs during the brief
time that we release the buffer lock. The reason for /that/ was to
prevent recovery from tripping over the empty ondisk block.
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
TLDR: Revert commit 51e6104fdb ("xfs: detect empty attr leaf blocks in
xfs_attr3_leaf_verify") because it was wrong.
Every now and then we get a corruption report from the kernel or
xfs_repair about empty leaf blocks in the extended attribute structure.
We've long thought that these shouldn't be possible, but prior to 5.18
one would shake loose in the recoveryloop fstests about once a month.
A new addition to the xattr leaf block verifier in 5.19-rc1 makes this
happen every 7 minutes on my testing cloud. I added a ton of logging to
detect any time we set the header count on an xattr leaf block to zero.
This produced the following dmesg output on generic/388:
XFS (sda4): ino 0x21fcbaf leaf 0x129bf78 hdcount==0!
Call Trace:
<TASK>
dump_stack_lvl+0x34/0x44
xfs_attr3_leaf_create+0x187/0x230
xfs_attr_shortform_to_leaf+0xd1/0x2f0
xfs_attr_set_iter+0x73e/0xa90
xfs_xattri_finish_update+0x45/0x80
xfs_attr_finish_item+0x1b/0xd0
xfs_defer_finish_noroll+0x19c/0x770
__xfs_trans_commit+0x153/0x3e0
xfs_attr_set+0x36b/0x740
xfs_xattr_set+0x89/0xd0
__vfs_setxattr+0x67/0x80
__vfs_setxattr_noperm+0x6e/0x120
vfs_setxattr+0x97/0x180
setxattr+0x88/0xa0
path_setxattr+0xc3/0xe0
__x64_sys_setxattr+0x27/0x30
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
So now we know that someone is creating empty xattr leaf blocks as part
of converting a sf xattr structure into a leaf xattr structure. The
conversion routine logs any existing sf attributes in the same
transaction that creates the leaf block, so we know this is a setxattr
to a file that has no attributes at all.
Next, g/388 calls the shutdown ioctl and cycles the mount to trigger log
recovery. I also augmented buffer item recovery to call ->verify_struct
on any attr leaf blocks and complain if it finds a failure:
XFS (sda4): Unmounting Filesystem
XFS (sda4): Mounting V5 Filesystem
XFS (sda4): Starting recovery (logdev: internal)
XFS (sda4): xattr leaf daddr 0x129bf78 hdrcount == 0!
Call Trace:
<TASK>
dump_stack_lvl+0x34/0x44
xfs_attr3_leaf_verify+0x3b8/0x420
xlog_recover_buf_commit_pass2+0x60a/0x6c0
xlog_recover_items_pass2+0x4e/0xc0
xlog_recover_commit_trans+0x33c/0x350
xlog_recovery_process_trans+0xa5/0xe0
xlog_recover_process_data+0x8d/0x140
xlog_do_recovery_pass+0x19b/0x720
xlog_do_log_recovery+0x62/0xc0
xlog_do_recover+0x33/0x1d0
xlog_recover+0xda/0x190
xfs_log_mount+0x14c/0x360
xfs_mountfs+0x517/0xa60
xfs_fs_fill_super+0x6bc/0x950
get_tree_bdev+0x175/0x280
vfs_get_tree+0x1a/0x80
path_mount+0x6f5/0xaa0
__x64_sys_mount+0x103/0x140
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fc61e241eae
And a moment later, the _delwri_submit of the recovered buffers trips
the same verifier and recovery fails:
XFS (sda4): Metadata corruption detected at xfs_attr3_leaf_verify+0x393/0x420 [xfs], xfs_attr3_leaf block 0x129bf78
XFS (sda4): Unmount and run xfs_repair
XFS (sda4): First 128 bytes of corrupted metadata buffer:
00000000: 00 00 00 00 00 00 00 00 3b ee 00 00 00 00 00 00 ........;.......
00000010: 00 00 00 00 01 29 bf 78 00 00 00 00 00 00 00 00 .....).x........
00000020: a5 1b d0 02 b2 9a 49 df 8e 9c fb 8d f8 31 3e 9d ......I......1>.
00000030: 00 00 00 00 02 1f cb af 00 00 00 00 10 00 00 00 ................
00000040: 00 50 0f b0 00 00 00 00 00 00 00 00 00 00 00 00 .P..............
00000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
XFS (sda4): Corruption of in-memory data (0x8) detected at _xfs_buf_ioapply+0x37f/0x3b0 [xfs] (fs/xfs/xfs_buf.c:1518). Shutting down filesystem.
XFS (sda4): Please unmount the filesystem and rectify the problem(s)
XFS (sda4): log mount/recovery failed: error -117
XFS (sda4): log mount failed
I think I see what's going on here -- setxattr is racing with something
that shuts down the filesystem:
Thread 1 Thread 2
-------- --------
xfs_attr_sf_addname
xfs_attr_shortform_to_leaf
<create empty leaf>
xfs_trans_bhold(leaf)
xattri_dela_state = XFS_DAS_LEAF_ADD
<roll transaction>
<flush log>
<shut down filesystem>
xfs_trans_bhold_release(leaf)
<discover fs is dead, bail>
Thread 3
--------
<cycle mount, start recovery>
xlog_recover_buf_commit_pass2
xlog_recover_do_reg_buffer
<replay empty leaf buffer from recovered buf item>
xfs_buf_delwri_queue(leaf)
xfs_buf_delwri_submit
_xfs_buf_ioapply(leaf)
xfs_attr3_leaf_write_verify
<trip over empty leaf buffer>
<fail recovery>
As you can see, the bhold keeps the leaf buffer locked and thus prevents
the *AIL* from tripping over the ichdr.count==0 check in the write
verifier. Unfortunately, it doesn't prevent the log from getting
flushed to disk, which sets up log recovery to fail.
So. It's clear that the kernel has always had the ability to persist
attr leaf blocks with ichdr.count==0, which means that it's part of the
ondisk format now.
Unfortunately, this check has been added and removed multiple times
throughout history. It first appeared in[1] kernel 3.10 as part of the
early V5 format patches. The check was later discovered to break log
recovery and hence disabled[2] during log recovery in kernel 4.10.
Simultaneously, the check was added[3] to xfs_repair 4.9.0 to try to
weed out the empty leaf blocks. This was still not correct because log
recovery would recover an empty attr leaf block successfully only for
regular xattr operations to trip over the empty block during of the
block during regular operation. Therefore, the check was removed
entirely[4] in kernel 5.7 but removal of the xfs_repair check was
forgotten. The continued complaints from xfs_repair lead to us
mistakenly re-adding[5] the verifier check for kernel 5.19. Remove it
once again.
[1] 517c22207b ("xfs: add CRCs to attr leaf blocks")
[2] 2e1d23370e ("xfs: ignore leaf attr ichdr.count in verifier
during log replay")
[3] f7140161 ("xfs_repair: junk leaf attribute if count == 0")
[4] f28cef9e4d ("xfs: don't fail verifier on empty attr3 leaf
block")
[5] 51e6104fdb ("xfs: detect empty attr leaf blocks in
xfs_attr3_leaf_verify")
Looking at the rest of the xattr code, it seems that files with empty
leaf blocks behave as expected -- listxattr reports no attributes;
getxattr on any xattr returns nothing as expected; removexattr does
nothing; and setxattr can add attributes just fine.
Original-bug: 517c22207b ("xfs: add CRCs to attr leaf blocks")
Still-not-fixed-by: 2e1d23370e ("xfs: ignore leaf attr ichdr.count in verifier during log replay")
Removed-in: f28cef9e4d ("xfs: don't fail verifier on empty attr3 leaf block")
Fixes: 51e6104fdb ("xfs: detect empty attr leaf blocks in xfs_attr3_leaf_verify")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
In do_promote(), we're never removing the current entry from the list
and so the list traversal is actually safe. Switch back to
list_for_each_entry().
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
In do_promote(), when the glock had no strong holders, we were
accidentally calling demote_incompat_holders() with new_gh == NULL, so
no weak holders were considered incompatible. Instead, the new holder
should have been passed in.
For doing that, the HIF_HOLDER flag needs to be set in new_gh to prevent
may_grant() from complaining. This means that the new holder will now
be recognized as a current holder, so skip over it explicitly in
demote_incompat_holders() to prevent it from being dequeued.
To further clarify things, we can now rename new_gh to current_gh in
demote_incompat_holders(); after all, the HIF_HOLDER flag is already set,
which means the new holder is already a current holder.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
In do_promote() and add_to_queue(), use current_gh as the variable name
for the first strong holder we could find: this matches the variable
name is may_grant(), and more clearly indicates that we're interested in
one (any) of the current strong holders.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Make go_instantiate take a glock instead of a glock holder as its argument:
this handler is supposed to instantiate the object associated with the glock.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Right now, inode_go_instantiate() contains functionality that relates to
how a glock is held rather than the glock itself, like waiting for
pending direct I/O to complete and completing interrupted truncates.
This code is meant to be run each time a holder is acquired, but
go_instantiate is actually only called once, when the glock is
instantiated.
To fix that, introduce a new go_held glock operation that is called each
time a glock holder is acquired. Move the holder specific code in
inode_go_instantiate() over to inode_go_held().
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Now that interrupted truncates are completed in the context of the
process taking the glock, there is no need for the glock state engine to
delegate that task to gfs2_quotad or for quotad to perform those
truncates anymore. Get rid of the obsolete associated infrastructure.
Reverts commit 813e0c46c9 ("GFS2: Fix "truncate in progress" hang").
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Instantiate glocks outside of the glock state engine: there is no real
reason for instantiating them inside the glock state engine; it only
complicates the code.
Instead, instantiate them in gfs2_glock_wait() and gfs2_glock_async_wait()
using the new gfs2_glock_holder_ready() helper. On top of that, the only
other place that acquires a glock without using gfs2_glock_wait() or
gfs2_glock_async_wait() is gfs2_upgrade_iopen_glock(), so call
gfs2_glock_holder_ready() there as well.
If a dinode has a pending truncate, the glock-specific instantiate function
for inodes wakes up the truncate function in the quota daemon. Waiting for
the completion of the truncate was previously done by the glock state
engine, but we now need to wait in inode_go_instantiate().
This also means that gfs2_instantiate() will now no longer return any
"special" error codes.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Since commit 1fc05c8d84 ("gfs2: cancel timed-out glock requests"), a
pending locking request can be canceled by calling gfs2_glock_dq() on
the pending holder. In gfs2_glock_async_wait(), when we time out, use
that to cancel the remaining locking requests and dequeue the locking
requests already granted. That's simpler as well as more efficient than
waiting for all locking requests to eventually be granted and dequeuing
them then.
In addition, gfs2_glock_async_wait() promises that by the time the
function completes, all glocks are either granted or dequeued, but the
implementation doesn't keep that promise if individual locking requests
fail. Fix that as well.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
The pagecache handles readpage failing by itself; it doesn't want
filesystems to remove pages from under it.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
If a buffer is completed with an error, its uptodate flag will be clear,
so the page_uptodate variable will have been set to 0. There's no
need to check PageError here.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
The page cache clears the error bit before calling ->read_folio(),
so this condition could never have been true.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Just because there has been a read error doesn't mean we should avoid
marking this part of the folio as uptodate. Indeed, it may overwrite
the error part of the folio and let us mark the entire folio uptodate.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Pages returned from read_mapping_page() are always uptodate, so
this check is unnecessary.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
read_mapping_folio() returns an ERR_PTR if the folio is not
uptodate, so this check is simply dead code.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
If read_mapping_page() encounters an error, it returns an errno, not
a page with PageError set, or a page that is not Uptodate, so this is
dead code.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
If read_mapping_page() encounters an error, it returns an errno, not a
page with PageError set, so this is dead code.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
If read_mapping_page() encounters an error, it returns an errno, not a
page with PageError set, so this is dead code.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
If read_mapping_page() encounters an error, it returns an errno, not a
page with PageError set, so this is dead code.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
If read_mapping_page() encounters an error, it returns an errno, not a
page with PageError set, so this test is not needed.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
If read_mapping_page() encounters an error, it returns an errno, not a
page with PageError set, so this test is not needed.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
If read_mapping_page() encounters an error, it returns an errno, not a
page with PageError set, so this is dead code.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
If read_mapping_page() encounters an error, it returns an errno, not a
page with PageError set, so this is dead code.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
If read_mapping_page() encounters an error, it returns an errno, not a
page with PageError set, so this is dead code.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
If read_mapping_page() encounters an error, it returns an errno, not a
page with PageError set, so this is dead code.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
If read_mapping_page() encounters an error, it returns an errno, not a
page with PageError set, so this is dead code.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Use folios throughout this function. That removes the last caller of
huge_pagevec_release(), so delete that too.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Convert this function to use folios throughout.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Acked-by: Chao Yu <chao@kernel.org>
The called functions all use pages, so just convert back to a page.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christian Brauner (Microsoft) <brauner@kernel.org>
If the folio is large, it may overlap the beginning or end of the
unused range. If it does, we need to avoid invalidating it.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Use a folio throughout this function.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Pass in a folio from mpage_readahead(). Also convert map_buffer_to_page()
to map_buffer_to_folio(). There's still no support for large folios here;
there are numerous places which depend on the folio being PAGE_SIZE.
The VM_BUG_ON prevents anyone from thinking that it will work.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Add the GL_NOPID flag for the remaining glock holders which are not
associated with the current process.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Add a GL_NOPID flag to indicate that once a glock holder has been acquired, it
won't be associated with the current process anymore. This is useful for iopen
and flock glocks which are associated with open files, as well as journal glock
holders and similar which are associated with the filesystem.
Once GL_NOPID is used for all applicable glocks (see the next patches),
processes will no longer be falsely reported as holding glocks which they are
not actually holding in the glocks dump file. Unlike before, when a process is
reported as having "(ended)", this will indicate an actual bug.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
