From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
To: Jesse Barnes <jbarnes@engr.sgi.com>
Cc: krmurthy@cisco.com, linux-kernel@vger.kernel.org, akpm@osdl.org
Subject: Re: Limiting memory allocated by buffer cache in 2.4 kernel
Date: Thu, 16 Dec 2004 07:14:57 -0200 [thread overview]
Message-ID: <20041216091457.GA8246@logos.cnet> (raw)
In-Reply-To: <200412150956.23799.jbarnes@engr.sgi.com>
On Wed, Dec 15, 2004 at 09:56:23AM -0800, Jesse Barnes wrote:
> On Wednesday, December 15, 2004 6:45 am, N.C.Krishna Murthy (krmurthy) wrote:
> > Hi,
> > I am using linux 2.4.22 kernel. Is there any way to limit the amount
> > of memory allocated by buffer cache? Eariler versions used to have
> > /proc/sys/vm/buffermem.
Nope, there is no such feature.
It may have worked in v2.2 (not sure about that though, have you checked?) but
it surely doesnt in v2.4.
> For that matter, is there a way to do this in 2.6? We've seen problems caused
> by huge page caches pushing data allocations off-node, so it would be really
> nice to have a limit control...
v2.6 doesnt have such feature either.
Shouldnt be too hard to add hooks at page_cache_alloc()/page_cache_alloc_cold()
level for dropping clean unmapped pages off the tail of the LRU once a given
limit is reached. Andrew ?
prev parent reply other threads:[~2004-12-16 12:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-15 14:45 Limiting memory allocated by buffer cache in 2.4 kernel N.C.Krishna Murthy (krmurthy)
2004-12-15 17:56 ` Jesse Barnes
2004-12-16 9:14 ` Marcelo Tosatti [this message]
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