From: Robin Getz <rgetz@blackfin.uclinux.org>
Organization: Blackfin uClinux org
To: "Mike Frysinger" <vapier@gentoo.org>
Subject: Re: [uClinux-dev] [PATCH] NOMMU: fix malloc performance by addinguninitialized flag
Date: Tue, 13 Oct 2009 11:20:59 -0400
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CC: uclinux-dev@uclinux.org, "David Howells" <dhowells@redhat.com>,
       "David McCullough" <davidm@snapgear.com>,
       "Greg Ungerer" <gerg@uclinux.org>, "Paul Mundt" <lethal@linux-sh.org>,
       uclinux-dist-devel@blackfin.uclinux.org, linux-kernel@vger.kernel.org,
       "Zhang, Jie" <jie.zhang@analog.com>
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On Tue 13 Oct 2009 03:44, Mike Frysinger pondered:
> From: Jie Zhang <jie.zhang@analog.com>
> 
> The no-mmu code currently clears all anonymous mmap-ed memory.  While this
> is what we want in the default case, all memory allocation from userspace
> under no-mmu has to go through this interface, including malloc() which is
> allowed to return uninitialized memory.  This can easily be a significant
> performance slow down.  So for constrained embedded systems were security
> is irrelevant, allow people to avoid unnecessarily clearing memory.
> 
> Signed-off-by: Jie Zhang <jie.zhang@analog.com>
> Signed-off-by: Robin Getz <rgetz@analog.com>

Should be rgetz@blackfin.uclinux.org -- rgetz@analog.com does not exist and will bounce.

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