Messages in this thread |  | | Date | Sun, 26 Aug 2001 16:52:11 -0300 (BRST) | From | Rik van Riel <> | Subject | Re: [resent PATCH] Re: very slow parallel read performance |
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On Sun, 26 Aug 2001, Daniel Phillips wrote: > On August 26, 2001 08:39 pm, Rik van Riel wrote: > > On Sun, 26 Aug 2001, Daniel Phillips wrote: > > > > > There's an obvious explanation for the high loadavg people are seeing > > > when their systems go into thrash mode: when free is exhausted, every > > > task that fails to get a block in __alloc_pages will become > > > PF_MEMALLOC and start scanning. > > > > If you ever tested this, you'd know this is not true. > > Look at this, supplied by Nicolas Pitre in the thread "What version of > the kernel fixes these VM issues?":
His kernel is running completely out of memory, with no swap space configured.
This is very different from a system which is thrashing because of the IO load.
regards,
Rik -- IA64: a worthy successor to i860.
http://www.surriel.com/ http://distro.conectiva.com/
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