[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH][QEMU] Logdirty debug cleanup
Restructure and add some debug messages around mapping the logdirty bitmap to make it clearer which operation is failing. Signed-off-by: Ben Guthro <bguthro@xxxxxxxxxxxxxx> Signed-off-by: Gary Grebus <ggrebus@xxxxxxxxxxxxxxx> diff -r 34e634f6743d tools/ioemu/xenstore.c --- a/tools/ioemu/xenstore.c Mon Aug 06 15:30:36 2007 -0400 +++ b/tools/ioemu/xenstore.c Mon Aug 06 15:30:36 2007 -0400 @@ -296,14 +296,21 @@ void xenstore_process_logdirty_event(voi logdirty_bitmap_size *= sizeof (unsigned long); /* bytes */ /* Map the shared-memory segment */ - if ((shmid = shmget(key, - 2 * logdirty_bitmap_size, - S_IRUSR|S_IWUSR)) == -1 - || (seg = shmat(shmid, NULL, 0)) == (void *)-1) { - fprintf(logfile, "Log-dirty: can't map segment %16.16llx (%s)\n", + fprintf(logfile, "%s: key=%16.16llx size=%d\n", __FUNCTION__, + (unsigned long long)key, logdirty_bitmap_size); + shmid = shmget(key, 2 * logdirty_bitmap_size, S_IRUSR|S_IWUSR); + if (shmid == -1) { + fprintf(logfile, "Log-dirty: shmget failed: segment %16.16llx (%s)\n", (unsigned long long) key, strerror(errno)); - exit(1); - } + exit(1); + } + + seg = shmat(shmid, NULL, 0); + if (seg == (void *)-1) { + fprintf(logfile, "Log-dirty: shmat failed: segment %16.16llx (%s)\n", + (unsigned long long) key, strerror(errno)); + exit(1); + } fprintf(logfile, "Log-dirty: mapped segment at %p\n", seg); _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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