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authorDavid Woodhouse <dwmw2@infradead.org>2007-03-08 10:28:30 +0000
committerDavid Woodhouse <dwmw2@infradead.org>2007-03-08 10:28:30 +0000
commitf8a922c7bb4d93bd84b7371a8e2571e667d2afb5 (patch)
tree3c412fe0a57cfd222e2a4b63f5599e5a2a08f08f /drivers/mtd
parent89e2bf61da9d7664293a57100a419f8116252607 (diff)
[JFFS2] Use yield() between GC passes in background thread.
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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