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Data loss XFS with RT kernel on Debian.

To: xfs@xxxxxxxxxxx
Subject: Data loss XFS with RT kernel on Debian.
From: Jan de Kruyf <jan.de.kruyf@xxxxxxxxx>
Date: Sat, 5 Jul 2014 14:41:06 +0200
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While doing a reasonably high density job like rsynching a subdirectory from one place to another, or tarring it to a pipe and untarring it at the other end, I note that the cpu usage goes practically to 100% and when I after 5 minutes or so I reset the computer the writing has not finished at all.
However on the stock Debian kernel it works without a problem.

Could I still use this combination in an industrial environment reading and writing reasonably short text files? So far I did not experience this problem with normal day to day use. It stuck up its head during installation of Âgnat-gpl-2014-x86_64-linux-bin from the http://libre.adacore.com/download/ page. The offending code is in the Makefile in the top directory page. The Xterm will give you the place where it gets stuck.


Jan de Kruijf.

Her are the details of the installation:

root@jan:~# xfs_info -V
xfs_info version 3.1.7

root@jan:~# xfs_info /usr
meta-data="" isize=256 agcount=4, agsize=732416 blks
       = sectsz=512 attr=2
   Âdata = "" blocks=2929664, imaxpct=25
       Â= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal bsize=4096 blocks=2560, version=2
   Â= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0

This combination does not work:
root@jan:~# uname -a
Linux jan 3.14-0.bpo.1-rt-amd64 #1 SMP PREEMPT RT Debian 3.14.7-1~bpo70+1 (2014-06-21) x86_64 GNU/Linux

Also kernel 3.10-0.bpo.3-rt-amd64 does not work

But this combination works:
Âroot@jan:~# uname -a
Linux jan 3.2.0-4-amd64 #1 SMP Debian 3.2.57-3+deb7u2 x86_64 GNU/Linux
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