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Re: [Xen-devel] 46% performance drop with change in glibc

To: habanero@xxxxxxxxxx
Subject: Re: [Xen-devel] 46% performance drop with change in glibc
From: Ulrich Drepper <drepper@xxxxxxxxxx>
Date: Wed, 02 Nov 2005 13:31:09 -0800
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
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Andrew Theurer wrote:
> So, on FC4, why 
> would these libs not be in /lib/tls in the first place?

Too l33t to read release notes?

There is no tls subdir since NPTL is the default (and LT is completely
gone in FC5).  The code in /lib is the TLS code using the correct ABI.

The crippled ABI is supported by the code in /lib/i686/nosegneg.  This
code is *automatically* used if the kernel is compiled to match the
glibc version.  This happens using the

linux-2.6-xen-vdso-note.patch

patch in Red Hat's kernel RPMs.

-- 
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖

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