Re: [resent PATCH] Re: very slow parallel read performance

Rik van Riel
2001-08-26T18:40:33Z

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.

In almost all cases where the system is thrashing
tasks are waiting for the data they need to be read
in from disk.

Rik
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