Re: Is there a way to turn file caching off ?

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On Wed, Apr 18, 2001 at 11:21:46AM -0700, David Schwartz wrote:
>
>
> [..] If we assume the caching isn't helping [..]

If you know kernel data cache doesn't help your workload at all then you want
use O_DIRECT at least to save the CPU. You can run 2.4.4pre3aa3 or apply the
rawio-3 patch and then the o_direct-2 patch on top of 2.4.4pre3 if you want
O_DIRECT support (it also fixes the O_SYNC wait for locked inode bug noticed by
Marcelo).

You will find detailed explanation on the O_DIRECT feature and where to
find the patches if you grep for subject O_DIRECT in the l-k list in the
messages of this month.

Andrea
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