Re: [PATCH] mm: tracking dirty pages -v6

[Nate Diller]

On 6/8/06, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> wrote:
> From: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
>
> People expressed the need to track dirty pages in shared mappings.
>
> Linus outlined the general idea of doing that through making clean
> writable pages write-protected and taking the write fault.
>
> This patch does exactly that, it makes pages in a shared writable
> mapping write-protected. On write-fault the pages are marked dirty and
> made writable. When the pages get synced with their backing store, the
> write-protection is re-instated.

Does this mean that processes dirtying pages via mmap are now subject
to write throttling?  That could dramatically change the performance
for tasks with a working set larger than 10% of memory.

NATE
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