Re: kernel 2.6.13 buffer strangeness

[Andrew Morton]

Anthony Wesley <awesley@xxxxxxxxxxxxxxx> wrote:
>
>  How else can it take only 70 seconds to reach 95% dirty when I have 1.3Gb of available RAM and data coming in at 25MBytes/sec and out at 17MBytes/sec? It doesn't make any sense...

What architecture?   x86?

If so then bear in mind that your memory is split into 500MB highmem and
800MB lowmem.  The kernel might be starting I/O due to the highmem zone
being full of dirty pages.  That'd be wrong of it if so - it's supposed to
just fall back to lowmem for the page allocations, but that code has
changed quite a bit in the two years since I got all that working...

You need to run `watch -n1 cat /proc/meminfo' while doing these tests...
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