Messages in this thread | | | Date | Tue, 21 Mar 2006 08:25:37 +1100 | From | kernel@kolivas ... | Subject | Re: [PATCH][3/3] mm: swsusp post resume aggressive swap prefetch |
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Quoting "Rafael J. Wysocki" <rjw@sisk.pl>:
> Hi, > > On Sunday 19 March 2006 16:34, Con Kolivas wrote: > > > > Swsusp reclaims a lot of memory during the suspend cycle and can benefit > > from the aggressive_swap_prefetch mode immediately upon resuming. > > It slows down the resume on my box way too much. Last time it took 10x more > time than actually reading the image. > > I think the problem is for the userland suspend (which I use) it's done too > early, > when the image pages are still in the swap, so they are taken into > consideration > by the aggressive prefetch. If that really is the case, the solution would > be to > trigger the aggressive prefetch from the userland, if needed, after the > image > pages have been released.
I assume this is unique to the userland resume as the in-kernel resume is not slowed down? If so, is there a way to differentiate the two so we only aggressively prefetch on kernel resume - is that what you meant by doing it in the other file?
Cheers, Con
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