linux-kernel - Re: Disabling in-memory write cache for x86-64 in Linux II

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Message-ID: <20131026113238.GC1792@Nokia-N900>
Date:	Sat, 26 Oct 2013 13:32:38 +0200
From:	Pavel Machek <pavel@....cz>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Theodore Ts'o <tytso@....edu>,
	"Artem S. Tashkinov" <t.artem@...os.com>,
	Wu Fengguang <fengguang.wu@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Disabling in-memory write cache for x86-64 in Linux II

On Fri 2013-10-25 10:32:16, Linus Torvalds wrote:
> On Fri, Oct 25, 2013 at 10:29 AM, Andrew Morton
> <akpm@...ux-foundation.org> wrote:
> >
> > Apparently all this stuff isn't working as desired (and perhaps as designed)
> > in this case.  Will take a look after a return to normalcy ;)
> 
> It definitely doesn't work. I can trivially reproduce problems by just
> having a cheap (==slow) USB key with an ext3 filesystem, and going a
> git clone to it. The end result is not pretty, and that's actually not
> even a huge amount of data.

Hmm, I'd expect the result to be "dead USB key". Putting
ext3 on cheap flash device normally just kills the devic :-(.


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