Tejun Heo 8a301eb16d fuse: fix congested state leak on aborted connections ... If a connection gets aborted while congested, FUSE can leave nr_wb_congested[] stuck until reboot causing wait_iff_congested() to wait spuriously which can lead to severe performance degradation. The leak is caused by gating congestion state clearing with fc->connected test in request_end(). This was added way back in 2009 by 26c3679101 ("fuse: destroy bdi on umount"). While the commit description doesn't explain why the test was added, it most likely was to avoid dereferencing bdi after it got destroyed. Since then, bdi lifetime rules have changed many times and now we're always guaranteed to have access to the bdi while the superblock is alive (fc->sb). Drop fc->connected conditional to avoid leaking congestion states. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Joshua Miller <joshmiller@fb.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: stable@vger.kernel.org # v2.6.29+ Acked-by: Jan Kara <jack@suse.cz> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>		2018-05-31 12:26:10 +02:00
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acl.c	fuse: Support fuse filesystems outside of init_user_ns	2018-03-20 17:11:44 +01:00
control.c	fuse: return -ECONNABORTED on /dev/fuse read after abort	2018-03-20 17:11:44 +01:00
cuse.c	fuse: Support fuse filesystems outside of init_user_ns	2018-03-20 17:11:44 +01:00
dev.c	fuse: fix congested state leak on aborted connections	2018-05-31 12:26:10 +02:00
dir.c	fuse: honor AT_STATX_FORCE_SYNC	2018-03-20 17:11:44 +01:00
file.c	vfs: do bulk POLL* -> EPOLL* replacement	2018-02-11 14:34:03 -08:00
fuse_i.h	fuse: Ensure posix acls are translated outside of init_user_ns	2018-05-31 12:26:10 +02:00
inode.c	fuse: Allow fully unprivileged mounts	2018-05-31 12:26:10 +02:00
Kconfig	fuse: Add posix ACL support	2016-10-01 07:32:32 +02:00
Makefile	fuse: Use generic xattr ops	2016-10-01 07:32:32 +02:00
xattr.c	fuse: Ensure posix acls are translated outside of init_user_ns	2018-05-31 12:26:10 +02:00