Date: Thu, 16 Dec 2010 09:57:16 -0800 (PST)
Message-Id: <20101216.095716.71123831.davem@davemloft.net>
To: bharrosh@panasas.com
Cc: npiggin@gmail.com, hooanon05@yahoo.co.jp, npiggin@kernel.dk,
        torvalds@linux-foundation.org, linux-arch@vger.kernel.org,
        x86@kernel.org, linux-kernel@vger.kernel.org,
        linux-fsdevel@vger.kernel.org
Subject: Re: Big git diff speedup by avoiding x86 "fast string" memcmp
From: David Miller <davem@davemloft.net>
In-Reply-To: <4D09E185.2040600@panasas.com>
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	<20101215.100055.226772943.davem@davemloft.net>
	<4D09E185.2040600@panasas.com>
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From: Boaz Harrosh <bharrosh@panasas.com>
Date: Thu, 16 Dec 2010 11:53:09 +0200

> You miss understood me. I'm saying that we know the beggining of the
> string is aligned and Nick offered to pad the last long, so surly
> a shift by 2 (or 3) + the reduction of the 12 dec-and-test to 3
> should give you an optimization?

Indeed, we could do something interesting in the case where both
strings are tail padded like that.
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