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SubjectRe: how to turn off, or to clear read cache?
Sergey Spiridonov wrote:
> Denis Vlasenko wrote:
>> umount/mount cycle will do it, as well as intentional OOMing the box
>> (from non-root account please;)
> OOMing doesn't help also, since kernel starts to swap and I have
> performance degradation after. Swithching off the swap is dangerous in
> conjunction with OOMing.

indirectly, patch mentioned in this mail can help:

it provides a way to limit read cache - so it is easier to flush it.

P.S. will love to see something like this in 2.6. And for 2.4 too.

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