From: Arjan van de Ven <arjan@infradead.org>
To: Artem Tashkinov <t.artem@lycos.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: A possibility of turning off file caching for certain operations
Date: Thu, 27 Apr 2006 10:32:56 +0200 [thread overview]
Message-ID: <1146126777.2894.18.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <20060427082922.77DB586B12@ws7-1.us4.outblaze.com>
On Thu, 2006-04-27 at 00:29 -0800, Artem Tashkinov wrote:
> A nice feature of emptying files and buffer cache was introduced in kernel 2.6.16 but my question is: Is it possible to turn off file caching for certain operations? E.g. I do not want the kernel to cache an ISO image which is being copied from HDD to the LAN or burned to CD.
it's called O_DIRECT and madvise()
but do you rEALLY REALLY want to disable caching? Caching, even a little
bit, is essential to get ok performance; if you disable caching it's
your responsibility to do all the things needed to get good IO
performance.
prev parent reply other threads:[~2006-04-27 8:33 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-27 8:29 Artem Tashkinov
2006-04-27 8:32 ` Arjan van de Ven [this message]
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