On 2012年09月25日 00:42, Eric Blake wrote:
On 09/24/2012 02:44 AM, Osier Yang wrote:
It might need some time till the LUN's stable path shows up on initiator host, and although the time window is not foreseeable, as a better than nothing fix, this patch adds timeout for the stable path discovery process. --- src/storage/storage_backend.c | 14 ++++++++++++-- 1 files changed, 12 insertions(+), 2 deletions(-)
@@ -1384,8 +1385,12 @@ virStorageBackendStablePath(virStoragePoolObjPtr pool, /* The pool is pointing somewhere like /dev/disk/by-path * or /dev/disk/by-id, so we need to check all symlinks in * the target directory and figure out which one points - * to this device node + * to this device node. + * + * And it might need some time till the stabe path shows
s/stabe/stable/
+ * up, so add timeout to retry here. */ + retry: while ((dent = readdir(dh)) != NULL) { if (dent->d_name[0] == '.') continue; @@ -1406,6 +1411,11 @@ virStorageBackendStablePath(virStoragePoolObjPtr pool, VIR_FREE(stablepath); }
+ if (++retry< 100) {
Why a magic number of 100? Not even a comment mentioning the maximum time we are waiting?
+ usleep(100 * 1000);
This says up to 100ms * 100, or 10 seconds. I guess that seems reasonable enough.
ACK if you fix those issues.
Thanks, pushed with nits fixed.