diff options
| author | K. Y. Srinivasan <kys@microsoft.com> | 2013-07-14 22:38:11 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-16 23:19:19 -0700 |
| commit | ed07ec93e83ec471d365ce084e43ad90fd205903 (patch) | |
| tree | 13a54d899c895549ea4b58521dbba90debbd284d /drivers/hv | |
| parent | 84672369ffb98a51d4ddf74c20a23636da3ad615 (diff) | |
| download | lwn-ed07ec93e83ec471d365ce084e43ad90fd205903.tar.gz lwn-ed07ec93e83ec471d365ce084e43ad90fd205903.zip | |
Drivers: hv: balloon: Fix a bug in the hot-add code
As we hot-add 128 MB chunks of memory, we wait to ensure that the memory
is onlined before attempting to hot-add the next chunk. If the udev rule for
memory hot-add is not executed within the allowed time, we would rollback the
state and abort further hot-add. Since the hot-add has succeeded and the only
failure is that the memory is not onlined within the allowed time, we should not
be rolling back the state. Fix this bug.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Cc: Stable <stable@vger.kernel.org>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv')
| -rw-r--r-- | drivers/hv/hv_balloon.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index 4c605c70ebf9..61b7351df1d4 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -562,7 +562,7 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size, struct hv_hotadd_state *has) { int ret = 0; - int i, nid, t; + int i, nid; unsigned long start_pfn; unsigned long processed_pfn; unsigned long total_pfn = pfn_count; @@ -607,14 +607,11 @@ static void hv_mem_hot_add(unsigned long start, unsigned long size, /* * Wait for the memory block to be onlined. + * Since the hot add has succeeded, it is ok to + * proceed even if the pages in the hot added region + * have not been "onlined" within the allowed time. */ - t = wait_for_completion_timeout(&dm_device.ol_waitevent, 5*HZ); - if (t == 0) { - pr_info("hot_add memory timedout\n"); - has->ha_end_pfn -= HA_CHUNK; - has->covered_end_pfn -= processed_pfn; - break; - } + wait_for_completion_timeout(&dm_device.ol_waitevent, 5*HZ); } |