* Barry K. Nathan <[EMAIL PROTECTED]>: > On Fri, Jan 14, 2005 at 02:55:27PM +0100, Tim Schmielau wrote: >> 2.6 seems in due need of such a patch. >> >> I recently found out that 2.6 kernels degrade horribly when going into >> swap. On my dual PIII-850 with as little as 256 mb ram, I can easily > [snip] > > I haven't tried the patch in question (unless it's in any Fedora > kernels), but I've noticed that the single biggest step to improve > swapping performance in 2.6 is to use the CFQ scheduler, not the AS > scheduler. (That's also why Red Hat/Fedora kernels use CFQ as the > default scheduler.)
I've not tried the patch yet, but with 1G mem / 1G swap when I finally hit the swap and quit the program that uses it (straw, gimp..), machine will stop responding for 10-15sec. I have 'elevator=cfq' in boot command and this is SMP. Last seen yesterday when shutting down 2.6.10-rc2-mm4 to try out latest -mm. I did vmstat runs a while ago, but didn't see anything really out of line, maybe it didn't get data either (or I don't know what is normal). -- Psi -- <http://www.iki.fi/pasi.savolainen> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
