Messages in this thread | | | Date | Wed, 28 Nov 2001 10:09:53 +0100 (CET) | From | Ingo Molnar <> | Subject | Re: [PATCH] remove BKL from llseek |
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On Wed, 28 Nov 2001, Anton Blanchard wrote:
> The dbench-o-matic results from removing the BKL from llseek can be > found here: > > http://samba.org/~anton/linux/llseek/ > > Same hardware as the earlier test, 12 way ppc64. The patch is pretty > dumb, I just pushed the kernel lock down into the llseek methods and > only replaced it with the inode semaphore in generic_llseek. Im sure > Al will have a better fix for 2.5, I just wanted to highlight the > problem :)
yeah i did that once (about a year ago or more) and it was rejected, cant remember why :-) But it's indeed an important optimization and it shows up in dbench overhead.
Ingo
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