linux-kernel - Re: Regression introduced by bfcfaa77bdf0f775263e906015982a608df01c76 (vfs: use 'unsigned long' accesses for dcache name comparison and hashing)

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Date:	Thu, 22 Mar 2012 13:52:14 -0700
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Al Viro <viro@...iv.linux.org.uk>
Cc:	linux-kernel@...r.kernel.org, xen-devel@...ts.xensource.com,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: Re: Regression introduced by bfcfaa77bdf0f775263e906015982a608df01c76
 (vfs: use 'unsigned long' accesses for dcache name comparison and hashing)

On Thu, Mar 22, 2012 at 1:44 PM, Al Viro <viro@...iv.linux.org.uk> wrote:
>
> See upthread for diff doing just that ;-)  Let's see if that fixes the
> crap guys are seeing...  BTW, you have used full_name_hash(), just not
> on something 8 char long - devpts uses d_alloc_name(), but pty numbers
> tend to be less than ten millions...

Moving the "*=9" down to the "next" iteration does fix it for me in my
user-space test I just whipped up. Not exhaustive, but  at least the
test confirms the thinking.

But yeah, let's verify that it also fixes the actual problem being reported.

And you're right, I don't have ten million pty's ;)

                        Linus
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