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Date: Mon, 07 May 2007 12:51:50 -0400 From: Rik van Riel <riel@...hat.com> To: Ulrich Drepper <drepper@...hat.com> CC: Nick Piggin <nickpiggin@...oo.com.au>, Linus Torvalds <torvalds@...ux-foundation.org>, linux-kernel <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>, Andrew Morton <akpm@...ux-foundation.org>, Jakub Jelinek <jakub@...hat.com> Subject: Re: [PATCH] MM: implement MADV_FREE lazy freeing of anonymous memory Ulrich Drepper wrote: > Rik van Riel wrote: >> It's trivial to merge the MADV_FREE #defines into the kernel >> though, and aliasing MADV_FREE to MADV_DONTNEED for the time >> being is a one-liner - just an extra constant into the big >> switch statement in sys_madvise(). > > Until the semantics of the implementation is cut into stone by having it > in the kernel I'll not start using it. The current MADV_DONTNEED implementation conforms to the semantics of MADV_FREE :) With MADV_FREE you can get back either your old data, or a freshly zeroed out new page. Always getting back the second alternative is conformant :) -- Politics is the struggle between those who want to make their country the best in the world, and those who believe it already is. Each group calls the other unpatriotic. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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