On Thu, 2002-04-11 at 15:24, John Wade wrote: > Just for reference, what file system type are you using (ext2, ext3, etc.)
ext3 with the noatime,data=journal options > Have you tried using gdb to backtrace what the processes are blocking > on? Yes, lmtpd was blocked in flock. > Hope it works for you, I have not looked at the lock_flock.c file on 2.1.3, > but I doubt that it has changed. Microscopic changes, diff attached for reference. Now waiting :-) -Hein
--- lock_flock.c.old Tue Oct 2 23:08:13 2001
+++ lock_flock.c Thu Apr 11 15:14:23 2002
@@ -48,6 +48,7 @@
#include <errno.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
+#include <syslog.h>
#endif
#include "lock.h"
@@ -56,6 +57,8 @@
extern int errno;
+#define MAXTIME 99
+
/*
* Block until we obtain an exclusive lock on the file descriptor 'fd',
* opened for reading and writing on the file named 'filename'. If
@@ -79,14 +82,27 @@
int r;
struct stat sbuffile, sbufspare;
int newfd;
+ int delay=0, i=0;
if (!sbuf) sbuf = &sbufspare;
- for (;;) {
- r = flock(fd, LOCK_EX);
+ for(i=0,delay=0;;) {
+ r = flock(fd, LOCK_EX|LOCK_NB);
if (r == -1) {
- if (errno == EINTR) continue;
- if (failaction) *failaction = "locking";
+ if (errno == EINTR) {
+ continue;
+ }
+ else if ((errno == EWOULDBLOCK) && (delay < MAXTIME)) {
+ syslog(LOG_DEBUG, "lock: reopen-blocked sleeping for %d on interval
+%d (%d, %s)" , delay, i, fd, filename);
+ sleep(delay);
+ i++;
+ delay = i*i;
+ continue;
+ }
+ if (failaction) {
+ if (delay >= MAXTIME) *failaction = "locking_timeout";
+ else *failaction = "locking";
+ }
return -1;
}
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