linux-kernel - Re: Word-at-a-time dcache name accesses (was Re: .. anybody know of any filesystems that depend on the exact VFS 'namehash' implementation?)

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Date:	Fri, 2 Mar 2012 19:02:03 -0500
From:	Ted Ts'o <tytso@....edu>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andi Kleen <andi@...stfloor.org>, "H. Peter Anvin" <hpa@...or.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Al Viro <viro@...iv.linux.org.uk>
Subject: Re: Word-at-a-time dcache name accesses (was Re: .. anybody know
 of any filesystems that depend on the exact VFS 'namehash'
 implementation?)

Stupid question.  Your patch requires unaligned accesses to not have a
heavy penalty, right?  Wasn't it the case that some generations of x86
had pretty large penalties for aligned accesses?  Is that something we
need to worry about?

						-  Ted
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