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improve error handling
[ust.git]
/
libust
/
relay.c
diff --git
a/libust/relay.c
b/libust/relay.c
index 05399b4a75787acb512eb30e09d6a721f80526a8..3259adee432da29fb1b063605b1d7bab01be3255 100644
(file)
--- a/
libust/relay.c
+++ b/
libust/relay.c
@@
-101,7
+101,11
@@
static int relay_alloc_buf(struct rchan_buf *buf, size_t *size)
*size = PAGE_ALIGN(*size);
result = buf->shmid = shmget(getpid(), *size, IPC_CREAT | IPC_EXCL | 0700);
*size = PAGE_ALIGN(*size);
result = buf->shmid = shmget(getpid(), *size, IPC_CREAT | IPC_EXCL | 0700);
- if(buf->shmid == -1) {
+ if(result == -1 && errno == EINVAL) {
+ ERR("shmget() returned EINVAL; maybe /proc/sys/kernel/shmmax should be increased.");
+ return -1;
+ }
+ else if(result == -1) {
PERROR("shmget");
return -1;
}
PERROR("shmget");
return -1;
}
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