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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