diff options
| author |   Lars Ellenberg <lars.ellenberg@linbit.com> | 2012-09-26 14:18:51 +0200 |
|---|---|---|
| committer |   Philipp Reisner <philipp.reisner@linbit.com> | 2012-11-09 14:11:39 +0100 |
| commit | bc891c9ae3fb2848922e0f0da22fd7de0d58dc1b (patch) | |
| tree | 58353dfe6fb1257533959a56346b5d5a0a15ad4f /scripts/patch-kernel | |
| parent | drbd: use list_move_tail instead of list_del/list_add_tail (diff) | |
drbd: fix potential deadlock during bitmap (re-)allocation
The former comment arguing that GFP_KERNEL was good enough was wrong: it
did not take resize into account at all, and assumed the only path
leading here was the normal attach on a still secondary device, so no
deadlock would be possible.
Both resize on a Primary, or attach on a diskless Primary,
could potentially deadlock.
drbd_bm_resize() is called while IO to the respective device is
suspended, so we must use GFP_NOIO to avoid potential deadlock.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'scripts/patch-kernel')
0 files changed, 0 insertions, 0 deletions