CC
---------- Forwarded message ----------
From: hake huang <[email protected]>
Date: 2011/8/26
Subject: Re: [LTP] Ltp-list Digest, Vol 63, Issue 22
To: Cyril Hrubis <[email protected]>
the log
#mmap1 -x 0.01
mmap1 0 TINFO : created thread[726717552]
mmap1 0 TINFO : pid[5117]: map, change contents, unmap files 1000
times
mmap1 0 TINFO : created thread[736490608]
mmap1 0 TINFO : pid[5117] - read contents of memory 0x2bf02000 1000
times
mmap1 0 TINFO : page fault occurred at 0x2ab27000
caught unexpected signal - 11 --- exiting
Regards,
Hake
2011/8/25 Cyril Hrubis <[email protected]>
> Hi!
> > I test LTP in arm, cortex-a9 which is 4 core system, and find that the
> mmap1
> > of memtest06, failed. when I check the LTP mail list and find this patch
> > http://www.mail-archive.com/[email protected]/msg10706.html
> > however, when I apply this patch, I can still see the same problem but
> with
> > less frequency. It looks like the write process and read process are
> running
> > on different core, when write process unmap and remap the address, and
> the
> > other process is read at the same time.
> >
> > So any suggestions?
>
> There is probably a race condition, what is exact output from the test
> on the failure?
>
> --
> Cyril Hrubis
> [email protected]
>
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