linux-kernel - Re: [PATCH] proc: return on proc

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Date:	Mon, 19 Aug 2013 20:30:10 -0400
From:	Marc Dionne <marc.c.dionne@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Richard Genoud <richard.genoud@...il.com>,
	Al Viro <viro@...iv.linux.org.uk>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] proc: return on proc_readdir error

On Mon, Aug 19, 2013 at 7:49 PM, Linus Torvalds
<torvalds@...ux-foundation.org> wrote:
> On Mon, Aug 19, 2013 at 1:33 PM, Marc Dionne <marc.c.dionne@...il.com> wrote:
>>
>> By my reading that commit (f0c3b5093add) also made proc_readdir always
>> return 0, so with this patch the effect I see is that no pid entries
>> are listed under /proc, breaking ps for instance.  I don't see how
>> even the previous version of proc_readdir could return a negative
>> value; looks like 1 and 0 were the only possible return values.
>
> Yes, see the other thread. The "return 1" case had gotten lost. I
> think current git should get everything right, but please do test. I
> did some testing of my own with a random little getdents test-program
> (just checking that it got the same results with different (small)
> buffer sizes), but it was by no means exhaustive.
>
>               Linus

It does fix the symptoms I was seeing, thanks.  "ps" now has output
and the pid entries are now visible again under /proc.

Marc
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