linux-kernel - Re: Downsides to madvise/fadvise(willneed) for application startup

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Message-ID: <87zl138w1v.fsf@basil.nowhere.org>
Date:	Fri, 16 Apr 2010 13:40:44 +0200
From:	Andi Kleen <andi@...obates.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Taras Glek <tglek@...illa.com>, linux-kernel@...r.kernel.org
Subject: Re: Downsides to madvise/fadvise(willneed) for application startup

Andrew Morton <akpm@...ux-foundation.org> writes:
>
> Yes, the linker scrambles the executable's block ordering.
>
> This just isn't an interesting case.  World-wide, the number of people
> who compile their own web browser and execute it from the file which ld
> produced is, umm, seven.

My understanding was that this is usually gone when you use a delayed
allocation fs (xfs, ext4), unless your link sequence takes much longer
than the flush window.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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