Re: [KORG] Re: kernel.org lies about latest -mm kernel

["H. Peter Anvin" <hpa@zytor.com>]

Andrew Morton wrote:
> > > The most fundamental problem seems to be that I can't tell currnt Linux 
> > > kernels that the dcache/icache is precious, and that it's way too eager 
> > > to dump dcache and icache in favour of data blocks.  If I could do that, 
> > > this problem would be much, much smaller.
> Usually people complain about the exact opposite of this.
>
> > Isn't setting the vm.vfs_cache_pressure sysctl below 100 supposed to do
> > this?
> yup.
Well, it appears that even a setting of 1 is too aggressive for 
kernel.org.  We're still ending up with each and every getdents() call 
taking anywhere from 200 ms to over a second.
	-hpa
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