From: Ralf Baechle <ralf@uni-koblenz.de>
To: "MEHTA,HIREN (A-SanJose,ex1)" <hiren_mehta@agilent.com>
Cc: "'linux-kernel@vger.kernel.org'" <linux-kernel@vger.kernel.org>
Subject: Re: pci_alloc_consistent question
Date: Fri, 19 Oct 2001 23:59:51 +0200 [thread overview]
Message-ID: <20011019235951.A29083@dea.linux-mips.net> (raw)
In-Reply-To: <01A7DAF31F93D511AEE300D0B706ED9208E4A5@axcs13.cos.agilent.com>
In-Reply-To: <01A7DAF31F93D511AEE300D0B706ED9208E4A5@axcs13.cos.agilent.com>; from hiren_mehta@agilent.com on Fri, Oct 19, 2001 at 03:24:14PM -0600
On Fri, Oct 19, 2001 at 03:24:14PM -0600, MEHTA,HIREN (A-SanJose,ex1) wrote:
> so, what is the conservative number ? 1MB ?
Even far below that. Most systems will allocate that memory using
get_free_pages and by allocating large pages such as 1mb you'll produce
high memory pressure. Try to get away with PAGE_SIZE * 2 if you can.
Large allocation are only ok if they're rare.
Ralf
next prev parent reply other threads:[~2001-10-19 22:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-19 21:24 pci_alloc_consistent question MEHTA,HIREN (A-SanJose,ex1)
2001-10-19 21:37 ` Jeff Garzik
2001-10-19 21:59 ` Ralf Baechle [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-10-19 18:32 MEHTA,HIREN (A-SanJose,ex1)
2001-10-19 18:51 ` Francois Romieu
2001-10-19 20:57 ` Ralf Baechle
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