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    SubjectRe: [PATCH] mm: tracking dirty pages -v6
    On 6/8/06, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
    >
    > From: Peter Zijlstra <a.p.zijlstra@chello.nl>
    >
    > 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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