vfs: Make sys_sync() use fsync_super() (version 4)

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It is unnecessarily fragile to have two places (fsync_super() and do_sync())
doing data integrity sync of the filesystem. Alter __fsync_super() to
accommodate needs of both callers and use it. So after this patch
__fsync_super() is the only place where we gather all the calls needed to
properly send all data on a filesystem to disk.

Nice bonus is that we get a complete livelock avoidance and write_supers()
is now only used for periodic writeback of superblocks.

sync_blockdevs() introduced a couple of patches ago is gone now.

[build fixes folded]

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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This commit is contained in:

Jan Kara 2009-04-27 16:43:51 +02:00 • committed by Al Viro

parent 429479f031

commit 5cee5815d1

7 changed files with 51 additions and 135 deletions

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15

fs/block_dev.c

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49

fs/fs-writeback.c

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16

fs/internal.h

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72

fs/super.c

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33

fs/sync.c

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