From 80273cb18f581206d41a47f011e85d7badee02dc Mon Sep 17 00:00:00 2001 From: Keir Fraser Date: Thu, 25 Oct 2007 15:04:33 +0100 Subject: [PATCH] qemu: Add extra tracing around logdirty bitmap setup. Signed-off-by: Ben Guthro Signed-off-by: Gary Grebus --- tools/ioemu/xenstore.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) diff --git a/tools/ioemu/xenstore.c b/tools/ioemu/xenstore.c index ed85eea5f0..5710466bac 100644 --- a/tools/ioemu/xenstore.c +++ b/tools/ioemu/xenstore.c @@ -303,12 +303,19 @@ void xenstore_process_logdirty_event(void) 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", - (unsigned long long) key, strerror(errno)); + 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); + } + + 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); } -- 2.30.2