Messages in this thread | | | Date | Mon, 10 Apr 2006 00:40:30 -0700 | From | Andrew Morton <> | Subject | Re: Slow swapon for big (12GB) swap |
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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?
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