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Subject: |
Re: [NFS] more statd segfault |
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Date: |
Thu, 11 Sep 2003 19:05:23 -0700 |
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Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.4) Gecko/20030624 |
I finally tracked down the statd segfault that had been plaguing me for
sometime.
statd calls sunrpc code which is in libc on debian. this code loops
through all possible file descriptors and in my case if the number of
fds per process is set higher then 8096 it segfaults.
for the archives here is the code that segfaults:
void
svc_getreqset (fd_set *readfds)
{
register u_int32_t mask;
register u_int32_t *maskp;
register int setsize;
register int sock;
register int bit;
setsize = _rpc_dtablesize ();
maskp = (u_int32_t *) readfds->fds_bits;
for (sock = 0; sock < setsize; sock += 32)
for (mask = *maskp++; (bit = ffs (mask)); mask ^= (1 << (bit - 1)))
svc_getreq_common (sock + bit - 1);
}
keywords: statd segfault sun rpc file lock ulimit
michael
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--- Begin Message ---
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Subject: |
Re: [NFS] more statd segfault |
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Date: |
Fri, 12 Sep 2003 16:39:16 +1000 |
On Thursday September 11, address@hidden wrote:
> I finally tracked down the statd segfault that had been plaguing me for
> sometime.
>
> statd calls sunrpc code which is in libc on debian. this code loops
> through all possible file descriptors and in my case if the number of
> fds per process is set higher then 8096 it segfaults.
Well done.
I have just applied a patch to statd and mountd in nfs-utils so that
it forces the fd limit down to FD_SETSIZE if it is above that. This
appears to effectively work around what is really a libc bug (I
think).
Have you reported it to the glibc maintainers?
NeilBrown
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