Messages in this thread | | | From | "Scott L. Burson" <> | Date | Sun, 3 Aug 2003 03:00:02 -0700 (PDT) | Subject | Re: SMP performance problem in 2.4 (was: Athlon spinlock performance) |
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From: Andrew Morton <akpm@osdl.org> Date: Sat, 2 Aug 2003 14:44:22 -0700
It is a problem which has been solved for a year at least. Try running one of Andrea's kernels, from
ftp://ftp.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4
The most important patch for you is 10_inode-highmem-2.
I tried that patch by itself and it appeared to make a noticeable improvement, but it was far from a complete fix.
So next I tried the SuSE 8.2 kernel. It is clearly *much* better, and I see that Andrea in fact did a bit of work on `mm/vmscan.c'. The key patch appears to be `05_vm_06_swap_out-3', but it's possible that several or all of the `05_vm_*' patches are helpful.
I see that even the very most recent Red Hat kernel (2.4.20-19.7, released only two weeks ago) does not seem to have these fixes. (I wasn't running Red Hat -- my machine started out with SuSE 7.3, and I hand-upgraded it to 2.4.18 -- but Mathieu Malaterre, who is CCed above and whose query to me about the problem got me started looking at it again, is using Red Hat.)
So I strongly urge the powers that be to include these patches in 2.4.22.
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