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<p class=MsoNormal><span lang=EN-US>Hello<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>I’m using GlusterFS-2.0.8 and I turn on readahead.
I got a Segfault when I try to read a directory.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>At the following trace, fd_ctx->dcache seems
to be NULL<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>volume readahead<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> type performance/read-ahead<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> option page-count
4 # 2 is default
option<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> option force-atime-update off #
default is off<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> subvolumes distribute<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>end-volume<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Program received signal SIGSEGV,
Segmentation fault.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>0x00002aaab4b03606 in libgf_dcache_readdir
(ctx=<value optimized out>,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> fd=<value optimized
out>, dirp=0x2aaab31cd7f8, offset=0x4f9d2248)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
libglusterfsclient.c:398<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>398
*offset = fd_ctx->dcache->next->d_off;<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>(gdb) bt<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>#0 0x00002aaab4b03606 in
libgf_dcache_readdir (ctx=<value optimized out>,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> fd=<value optimized
out>, dirp=0x2aaab31cd7f8, offset=0x4f9d2248)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
libglusterfsclient.c:398<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>#1 0x00002aaab4b100d9 in
libgf_client_readdir (ctx=0x2aaab31cd80b,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> fd=0x2aaab48e0928,
dirp=0x0, offset=0x0) at libglusterfsclient.c:4151<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>#2 0x00002aaab4b1047f in
glusterfs_readdir (dirfd=0x2aaab319b310)<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> at
libglusterfsclient.c:4253<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>#3 0x00002aaab48e7e38 in
gluster_readdir (self=<value optimized out>,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US> args=0x2aaab4824840) at
glusterfs.c:1035<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US>(gdb) p
fd_ctx->dcache->next->d_off<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>Cannot access memory at address 0xb8<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>(gdb) p fd_ctx<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>$1 = (libglusterfs_client_fd_ctx_t *)
0x2aaab31cd7c0<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>(gdb) p fd_ctx->dcache<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US>$2 = (struct direntcache *) 0x0<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;text-autospace:ideograph-numeric ideograph-other;
word-break:keep-all'><b><span lang=EN-US style='font-family:굴림'>DongMin Yu</span></b><span
lang=EN-US style='font-size:12.0pt;font-family:굴림'><o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;text-autospace:ideograph-numeric ideograph-other;
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<p class=MsoNormal align=left style='text-align:left;text-autospace:ideograph-numeric ideograph-other;
word-break:keep-all'><span lang=EN-US style='font-family:굴림'>HOSTWAY IDC Corp.
/ R&D Principal Researcher</span><span lang=EN-US style='font-size:12.0pt;
font-family:굴림'><o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;text-autospace:ideograph-numeric ideograph-other;
word-break:keep-all'><span lang=EN-US style='font-family:굴림'>TEL. +822 2105
6037</span><span lang=EN-US style='font-size:12.0pt;font-family:굴림'><o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;text-autospace:ideograph-numeric ideograph-other;
word-break:keep-all'><span lang=EN-US style='font-family:굴림'>FAX. +822 2105
6019</span><span lang=EN-US style='font-size:12.0pt;font-family:굴림'><o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;text-autospace:ideograph-numeric ideograph-other;
word-break:keep-all'><span lang=EN-US style='font-family:굴림'>CELL. +8216 2086
1357</span><span lang=EN-US style='font-size:12.0pt;font-family:굴림'><o:p></o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;text-autospace:ideograph-numeric ideograph-other;
word-break:keep-all'><span lang=EN-US style='font-family:굴림'>EMAIL: <a
href="mailto:min.yu@hostwaycorp.com"><span style='color:blue'>min.yu@hostwaycorp.com</span></a>
</span><span lang=EN-US style='font-size:12.0pt;font-family:굴림'><o:p></o:p></span></p>
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word-break:keep-all'><span lang=EN-US style='font-family:굴림'>Website: <a
href="http://www.hostway.com"><span style='color:blue'>http://www.hostway.com</span></a>
</span><span lang=EN-US style='font-size:12.0pt;font-family:굴림'><o:p></o:p></span></p>
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