Re: [Gluster-devel] Segfault at cache read_dir

[Shehjar Tikoo]

Dongmin Yu wrote:
> Hello,
>
>  
>
> To isolate the issue, I created a simple test case.
>
> I’m using CentOS 64bit. The configuration was not the issue.
>
> This test works fine with 2.0.7 but does endless loop with 2.0.8 client.

Thats a good lead. I'll check it out.

Thanks
-Shehjar

>  
>
> Thanks
>
>  
>
> *DongMin Yu*
>
>  
>
> HOSTWAY IDC Corp. / R&D Principal Researcher
>
> TEL. +822 2105 6037
>
> FAX. +822 2105 6019
>
> CELL. +8216 2086 1357
>
> EMAIL: address@hidden <mailto:address@hidden>
>
> Website: http://www.hostway.com
>
>  
>
> *NOTICE:  This email and any file transmitted are confidential and/or 
> legally privileged and intended only for the person(s) directly 
> addressed.  If you are not the intended recipient, any use, copying, 
> transmission, distribution, or other forms of dissemination is strictly 
> prohibited.  If you have received this email in error, please notify the 
> sender immediately and permanently delete the email and files, if any.*
>
> *From:* address@hidden 
> [mailto:address@hidden *On Behalf 
> Of *Dongmin Yu
> *Sent:* Tuesday, November 24, 2009 8:01 PM
> *To:* address@hidden
> *Subject:* [Gluster-devel] Segfault at cache read_dir
>
>  
>
> Hello
>
>  
>
> I’m using GlusterFS-2.0.8 and I turn on readahead. I got a Segfault when 
> I try to read a directory.
>
> At the following trace, fd_ctx->dcache seems to be NULL
>
>  
>
>  
>
> volume readahead
>
>   type performance/read-ahead
>
>   option page-count 4           # 2 is default option
>
>   option force-atime-update off # default is off
>
>   subvolumes distribute
>
> end-volume
>
>  
>
>  
>
>  
>
> Program received signal SIGSEGV, Segmentation fault.
>
> 0x00002aaab4b03606 in libgf_dcache_readdir (ctx=<value optimized out>,
>
>     fd=<value optimized out>, dirp=0x2aaab31cd7f8, offset=0x4f9d2248)
>
>     at libglusterfsclient.c:398
>
> 398             *offset = fd_ctx->dcache->next->d_off;
>
> (gdb) bt
>
> #0  0x00002aaab4b03606 in libgf_dcache_readdir (ctx=<value optimized out>,
>
>     fd=<value optimized out>, dirp=0x2aaab31cd7f8, offset=0x4f9d2248)
>
>     at libglusterfsclient.c:398
>
> #1  0x00002aaab4b100d9 in libgf_client_readdir (ctx=0x2aaab31cd80b,
>
>     fd=0x2aaab48e0928, dirp=0x0, offset=0x0) at libglusterfsclient.c:4151
>
> #2  0x00002aaab4b1047f in glusterfs_readdir (dirfd=0x2aaab319b310)
>
>     at libglusterfsclient.c:4253
>
> #3  0x00002aaab48e7e38 in gluster_readdir (self=<value optimized out>,
>
>     args=0x2aaab4824840) at glusterfs.c:1035
>
>  
>
> (gdb) p  fd_ctx->dcache->next->d_off
>
> Cannot access memory at address 0xb8
>
> (gdb) p  fd_ctx
>
> $1 = (libglusterfs_client_fd_ctx_t *) 0x2aaab31cd7c0
>
> (gdb) p  fd_ctx->dcache
>
> $2 = (struct direntcache *) 0x0
>
>  
>
>  
>
> *DongMin Yu*
>
>  
>
> HOSTWAY IDC Corp. / R&D Principal Researcher
>
> TEL. +822 2105 6037
>
> FAX. +822 2105 6019
>
> CELL. +8216 2086 1357
>
> EMAIL: address@hidden <mailto:address@hidden>
>
> Website: http://www.hostway.com
>
>  
>
> *NOTICE:  This email and any file transmitted are confidential and/or 
> legally privileged and intended only for the person(s) directly 
> addressed.  If you are not the intended recipient, any use, copying, 
> transmission, distribution, or other forms of dissemination is strictly 
> prohibited.  If you have received this email in error, please notify the 
> sender immediately and permanently delete the email and files, if any.*
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Gluster-devel mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/gluster-devel