Messages in this thread | | | From | Con Kolivas <> | Subject | Re: 2.6.15-rc5-mm3 | Date | Thu, 22 Dec 2005 15:16:10 +1100 |
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Jesper Juhl writes:
> On 12/15/05, Andrew Morton <akpm@osdl.org> wrote: >> > <!-- snip --> >> >> -mm-implement-swap-prefetching.patch >> -mm-implement-swap-prefetching-default-y.patch >> -mm-implement-swap-prefetching-tweaks.patch >> -mm-implement-swap-prefetching-tweaks-2.patch >> -mm-swap-prefetch-magnify.patch >> >> Dropped swap prefetching, sorry. I wasn't able to notice much benefit from >> it in my testing, and the number of mm/ patches in getting crazy, so we don't >> have capacity for speculative things at present. >> > <!-- snip --> > > This is a bit sad. > On my system (1.4GHz Athlon w/512MB RAM, 768MB swap) this did have an effect. > One situation in particular where it helped (and which is a common > case for me) was when I had OpenOffice2 + Eclipse (with CDT) + xchat + > nedit + Firefox + a few konsole windows open (running KDE 3.5 btw and > all apps usually have a lot of content loaded), minimized all the apps > and then started an allyesconfig build in one window - the > allyesconfig build would drag the machine to its knees and eat up more > or less all RAM + swap, so I usually left it alone for a while to > finish and when I then came back later and reactivated the apps I had > minimized they came back pretty fast. Without the swap prefetch > patches things come back somewhat slower - it's not an earth > shattering difference, but it's definately noticable.
Apart from the feedback I've gotten directly from users of the -ck patchset incorporating this, Andrew and lkml has had very few reports about it until he decided to drop it. I'm still maintaining the code in -ck indefinitely for the moment. Here's hoping he picks it up again in the future.
Cheers, Con
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