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Date: Sun, 29 Jan 2012 13:07:22 +0800 From: Wu Fengguang <fengguang.wu@...el.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Christoph Lameter <cl@...ux.com>, Andi Kleen <andi@...stfloor.org>, Ingo Molnar <mingo@...e.hu>, Jens Axboe <axboe@...nel.dk>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Rik van Riel <riel@...hat.com>, Linux Memory Management List <linux-mm@...ck.org>, linux-fsdevel@...r.kernel.org, LKML <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 6/9] readahead: add /debug/readahead/stats On Fri, Jan 27, 2012 at 12:15:51PM -0800, Andrew Morton wrote: > > The accounting code will be compiled in by default > > (CONFIG_READAHEAD_STATS=y), and will remain inactive by default. > > I agree with those choices. They effectively mean that the stats will > be a developer-only/debugger-only thing. So even if the atomic_inc() > costs are measurable during these develop/debug sessions, is anyone > likely to care? Sorry I have changed the default to CONFIG_READAHEAD_STATS=n to avoid bloating the kernel (and forgot to edit the changelog accordingly). I'm not sure how many people are going to check the readahead stats. Thanks, Fengguang -- 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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