Messages in this thread | | | Date | Thu, 13 Apr 2006 22:25:16 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH 2/5] Swapless V2: Add migration swap entries |
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Christoph Lameter <clameter@sgi.com> wrote: > > On Thu, 13 Apr 2006, Andrew Morton wrote: > > > Andrew Morton <akpm@osdl.org> wrote: > > > > > > Perhaps it would be better to go to > > > sleep on some global queue, poke that queue each time a page migration > > > completes? > > > > Or take mmap_sem for writing in do_migrate_pages()? That takes the whole > > pagefault path out of the picture. > > We would have to take that for each task mapping the page. Very expensive > operation.
So... why does do_migrate_pages() take mmap_sem at all?
And the code we're talking about here deals with anonymous pages, which are not shared betweem mm's. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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