diff options
| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2012-09-20 14:05:39 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2012-10-30 08:39:18 +0100 |
| commit | 0b143d4382b62db6738196caaefa793e5c0f6690 (patch) | |
| tree | 0163ab96980949c3bc6e578540e3fa7e95969b74 /tools/perf/scripts/python/syscall-counts.py | |
| parent | 7fb907c15fb8d0e10e72c8566a13f6defab3f484 (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>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions