linux-kernel - invalidate/drop filesystem caches & io buffers

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Message-ID: <f36b08ee0611080453p5401de04td2fef8bff4d0efb3@mail.gmail.com>
Date:	Wed, 8 Nov 2006 14:53:34 +0200
From:	"Yakov Lerner" <iler.ml@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: invalidate/drop filesystem caches & io buffers

I'd like to invalidate/free the filesystem caches and io buffer cache
How can I do this when I can't unmount the filesystem (and w/o reboot) ?

(I run filesystem I/O test that needs to  start from fresh  cache &
buffer state -- as emty as possible, like right after mount/boot).

I tried  'mount -o remount' but it didn't make any difference
on the timing. Apparently 'mount -o remount' did not invalidate
cases/buffers ? ( The difference between fresh run vs non-fresh
run timing is x5 times ).

Thanks
Yakov
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