Messages in this thread | | | Date | Thu, 23 Mar 2006 12:19:37 +0100 | From | "Jesper Juhl" <> | Subject | Re: swap prefetching merge plans |
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On 3/23/06, Con Kolivas <kernel@kolivas.org> wrote: > On Thu, 23 Mar 2006 03:53 pm, Andrew Morton wrote: > > A look at the -mm lineup for 2.6.17: > > > mm-implement-swap-prefetching.patch > > mm-implement-swap-prefetching-fix.patch > > mm-implement-swap-prefetching-tweaks.patch > > > Still don't have a compelling argument for this, IMO. > > For those users who feel they do have a compelling argument for it, please > speak now or I'll end up maintaining this in -ck only forever. I've come to > depend on it with my workloads now so I'm never dropping it. There's no point > me explaining how it is useful yet again, though, because I just end up > looking like I'm handwaving. It seems a shame for it not to be available to > all linux users. >
I certainly like it and see a bennefit. My situation is like this: A KDE desktop with OpenOffice, Lyx, Firefox, Eclipse, Gimp & a bunch of xterms running more or less permanently. When I work on kernel stuff I often end up running "make clean ; make allyesconfig ; make" and the build and especially final link of the kernel usually kills the box for a while, so I tend to walk away and come back a while later when it's done. Where I see the bennefit of swap prefetch is when I come back to my box after such a build and pull one of my other running apps back to the foreground. The apps come back noticably faster when I'm running a swap prefetching kernel - we are not talking massive amounts of time, just a few seconds, but it's enough for me to notice when I sometimes happen to run a mainline kernel without swap prefetch.
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