Re: Firefox hangs in state 'kqread'
:Hello,
:
:I have finally come to the conclusion that the problem was introduced between
:January 30th and February 1st, somewhere in libc_r.
:
:When I replace, on a latest -CURRENT world and kernel, /usr/lib/libc_r.so.4 by
:an older version dating from 01/30, the hangs disappear.
:..
:
:Regards,
:
:Laurent
This date range encompasses the first major threading commit for libc.
I went through the code and one thing stuck out... actually two things
stuck out. _kevent() and _flock().
/usr/src/lib/libc/net/res_send.c appears to call _kevent() when I
believe it should be calling kevent().
and /usr/src/lib/libc/yp/yplib.c calls _flock() when I believe it
should be calling flock().
David or Joerg... could you check out the use of kevent in
net/res_send.c ?
I compiled a simple program which called res_send() -g -pthread -static
and objdump -d'd the result. res_send() appears to call __sys_kevent()
directly and does not appear to running through libc_r's version of
kevent().
Laurent, could you please try this patch, and then recompile and
reinstall your libc_r ?
-Matt
Matthew Dillon
<dillon@backplane.com>
Index: net/res_send.c
===================================================================
RCS file: /cvs/src/lib/libc/net/res_send.c,v
retrieving revision 1.4
diff -u -r1.4 res_send.c
--- net/res_send.c 31 Jan 2005 22:29:33 -0000 1.4
+++ net/res_send.c 20 Mar 2005 18:37:38 -0000
@@ -728,7 +728,7 @@
EV_SET(&kv, s, EVFILT_READ, EV_ADD | EV_ONESHOT, 0,0,0);
- n = _kevent(kq, &kv, 1, &kv, 1, &ts);
+ n = kevent(kq, &kv, 1, &kv, 1, &ts);
if (n < 0) {
if (errno == EINTR) {
(void) gettimeofday(&ctv, NULL);
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