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Message-ID: <CAKgNAkgX8z=hZofSqkAb9VA_9mMBbRBDHdkX9NUentHSP4Lkog@mail.gmail.com> Date: Tue, 30 Dec 2014 21:51:11 +0100 From: "Michael Kerrisk (man-pages)" <mtk.manpages@...il.com> To: Mel Gorman <mgorman@...e.de> Cc: Andrew Morton <akpm@...ux-foundation.org>, Linux-MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 0/2] Improve documentation of FADV_DONTNEED behaviour On Wed, Dec 3, 2014 at 1:42 AM, Mel Gorman <mgorman@...e.de> wrote: > Partial page discard requests are ignored and the documentation on why this > is correct behaviour sucks. A readahead patch looked like a "regression" to > a random IO storage benchmark because posix_fadvise() was used incorrectly > to force IO requests to go to disk. In reality, the benchmark sucked but > it was non-obvious why. Patch 1 updates the kernel comment in case someone > "fixes" either readahead or fadvise for inappropriate reasons. Patch 2 > updates the relevant man page on the rough off chance that application > developers do not read kernel source comments. It feels like that last sentence should have made LWN quote of the week :-/. -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- 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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