From: Andrew Morton <akpm@osdl.org>
To: Grzegorz Kulewski <kangur@polcom.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Slow swapon for big (12GB) swap
Date: Mon, 10 Apr 2006 00:40:30 -0700 [thread overview]
Message-ID: <20060410004030.5e48be79.akpm@osdl.org> (raw)
In-Reply-To: <Pine.LNX.4.63.0604091338030.31989@alpha.polcom.net>
Grzegorz Kulewski <kangur@polcom.net> wrote:
>
> I am using big swap here (as a backing for potentially huge tmpfs). And I
> wonder why swapon on such big (like 12GB) swap takes about 7 minutes
> (continuous disk IO).
It's a bit quicker here:
vmm:/usr/src/25# mkswap /dev/hda6
Setting up swapspace version 1, size = 54031826 kB
vmm:/usr/src/25# time swapon /dev/hda6
swapon /dev/hda6 0.00s user 0.04s system 74% cpu 0.054 total
> Is this expected?
Nope.
> Why it is like that?
Are you using a swapfile or a swap partition?
If it's a swapfile then perhaps the filesystem is being inefficient in its
bmap() function. Which filesystem is it?
next prev parent reply other threads:[~2006-04-10 8:41 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-09 11:45 Grzegorz Kulewski
2006-04-10 7:34 ` Helge Hafting
2006-04-10 10:17 ` Grzegorz Kulewski
2006-04-11 11:30 ` Jan Engelhardt
2006-04-11 11:46 ` linux-os (Dick Johnson)
2006-04-10 7:40 ` Andrew Morton [this message]
2006-04-10 9:44 ` Antonio Vargas
2006-04-10 10:25 ` Grzegorz Kulewski
2006-04-10 9:54 ` Andrew Morton
2006-04-10 11:45 ` Grzegorz Kulewski
2006-04-10 10:27 ` Con Kolivas
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