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Subject: Re: [PATCH] Don't write beyond destination in
 __mempcpy_avx512_no_vzeroupper (bug 23196)
To: Andreas Schwab <schwab@suse.de>
Cc: "H.J. Lu" <hjl.tools@gmail.com>,
 Andrew Senkevich <andrew.n.senkevich@gmail.com>,
 GNU C Library <libc-alpha@sourceware.org>
References: <mvm1se4romh.fsf@suse.de>
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 <mvmpo1nrijw.fsf@suse.de> <3e10ac72-b5a3-f74c-45da-29d8fde75ac7@redhat.com>
 <mvm4lizrflh.fsf@suse.de> <0d694123-e9f9-9d4d-6ad0-71a6ff0fd44a@redhat.com>
 <mvmvabfpyo9.fsf@suse.de> <7074c0e3-dfda-f527-baad-bd1734b496d3@redhat.com>
 <mvmr2m3pw5l.fsf@suse.de>
From: Florian Weimer <fweimer@redhat.com>
Message-ID: <8cbc0054-edc3-b5bf-c6be-575a68eb9c6f@redhat.com>
Date: Tue, 22 May 2018 15:35:00 -0000
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On 05/22/2018 05:06 PM, Andreas Schwab wrote:
> On Mai 22 2018, Florian Weimer<fweimer@redhat.com>  wrote:
> 
>> And with the original reproducer, we wouldn't hit preloop_large, where the
>> bug is.
> Worksforme.
> 
> $ string/test-mempcpy

I don't doubt that.  Our CPUs probably have different cache sizes, or 
there are differences in how different glibc versions compute the 
effective cache size.

Thanks,
Florian