[JFFS2] Use yield() between GC passes in background thread.

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The garbage collection thread is strictly an optimisation. Everything it
does would also be done just-in-time in the context of something in
userspace trying to access the file system.

Sometimes, however, it's a pessimisation. Especially during early boot
when it's checksumming nodes and scanning inodes which are shortly going
to be pulled in by read_inode anyway. We end up building the rbtree of
node coverage twice for the same inode.

By switching to yield() instead of cond_resched() in the main loop, we
observe boot times on the OLPC system going down from about 100 seconds to
60.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

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David Woodhouse 2007-03-08 10:28:30 +00:00

parent 89e2bf61da

commit f8a922c7bb

1 changed files with 7 additions and 1 deletions

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fs/jffs2/background.c

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