[Bug 427288] Re: Karmic i386 EC2 kernel emulating unsupported memory accesses

Kostas Chatzikokolakis 427288 at bugs.launchpad.net
Thu Oct 28 10:26:01 BST 2010


This problem is still present in lucid when using imagemagick (and I
presume other packages), even though it does not appear when booting.

To reproduce
- launch "ami-a403f7cd" (latest lucid 32bit). dmesg output is clean
- install the 'imagemagick' package
- run 'convert' without any argument. The command takes 10+ seconds to run. After finishing dmesg output contains the following:

** WARNING: Currently emulating unsupported memory accesses  ** 
**          in /lib/tls glibc libraries. The emulation is    ** 
**          slow. To ensure full performance you should      ** 
**          install a 'xen-friendly' (nosegneg) version of   ** 
**          the library, or disable tls support by executing ** 
**          the following as root:                           ** 
**          mv /lib/tls /lib/tls.disabled                    ** 
** Offending process: convert (pid=910)                      ** 

Deleting /lib/tls does not help.
Interestingly, the issue does _not_ appear in the latest maverick.

ldd /usr/bin/convert output:
        linux-gate.so.1 =>  (0xb78e2000) 
        libMagickCore.so.2 => /usr/lib/libMagickCore.so.2 (0xb76a3000) 
        libMagickWand.so.2 => /usr/lib/libMagickWand.so.2 (0xb758e000) 
        liblcms.so.1 => /usr/lib/liblcms.so.1 (0xb755a000) 
        libtiff.so.4 => /usr/lib/libtiff.so.4 (0xb74fe000) 
        libc.so.6 => /lib/tls/i686/nosegneg/libc.so.6 (0xb73a0000) 
        libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0xb732a000) 
        libjpeg.so.62 => /usr/lib/libjpeg.so.62 (0xb7309000) 
        libXext.so.6 => /usr/lib/libXext.so.6 (0xb72f9000) 
        libXt.so.6 => /usr/lib/libXt.so.6 (0xb72a5000) 
        libbz2.so.1.0 => /lib/libbz2.so.1.0 (0xb7293000) 
        libz.so.1 => /lib/libz.so.1 (0xb727e000) 
        libpthread.so.0 => /lib/tls/i686/nosegneg/libpthread.so.0 
(0xb7265000) 
        libltdl.so.7 => /usr/lib/libltdl.so.7 (0xb725c000) 
        libdl.so.2 => /lib/tls/i686/nosegneg/libdl.so.2 (0xb7258000) 
        libSM.so.6 => /usr/lib/libSM.so.6 (0xb724e000) 
        libICE.so.6 => /usr/lib/libICE.so.6 (0xb7235000) 
        libX11.so.6 => /usr/lib/libX11.so.6 (0xb7118000) 
        libgomp.so.1 => /usr/lib/libgomp.so.1 (0xb710a000) 
        libm.so.6 => /lib/tls/i686/nosegneg/libm.so.6 (0xb70e4000) 
        /lib/ld-linux.so.2 (0xb78e3000) 
        libuuid.so.1 => /lib/libuuid.so.1 (0xb70de000) 
        libxcb.so.1 => /usr/lib/libxcb.so.1 (0xb70c4000) 
        librt.so.1 => /lib/tls/i686/nosegneg/librt.so.1 (0xb70bb000) 
        libXau.so.6 => /usr/lib/libXau.so.6 (0xb70b7000) 
        libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0xb70b1000) 


Any ideas? I would prefer to avoid upgrading to maverick because of this.

-- 
Karmic i386 EC2 kernel emulating unsupported memory accesses
https://bugs.launchpad.net/bugs/427288
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