Messages in this thread | | | Date | Sun, 17 Mar 2002 17:09:55 -0500 | From | Theodore Tso <> | Subject | Re: [Lse-tech] 7.52 second kernel compile |
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On Sun, Mar 17, 2002 at 11:34:34PM +1100, Anton Blanchard wrote: > > > And this *without* the dcache_lock? Hmm. So you are saying there > > may still be room for improvement? > > I tried the dcache lock patches but found it hard to see a difference, > for us the mm stuff still seems to be the bottleneck.
Try the patch which gets rid of the BKL in ext2_get_block() --- if you don't have that, let me know, I've got one kicking around that mostly works except I haven't validated that it does the right thing if quotas are enabled. If you're running with a cold page cache, I suspect that will help out much more. If the numbers are assuming a page-cache already preloaded with then getting rid of the BKL in ext2_get_block() will help somewhat, but maybe not enough to be significant.
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