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| author | Lars Ellenberg <lars.ellenberg@linbit.com> | 2012-09-26 14:22:40 +0200 |
|---|---|---|
| committer | Philipp Reisner <philipp.reisner@linbit.com> | 2012-11-09 14:11:40 +0100 |
| commit | 8747d30af97232f9ff4cde78b8d259cc715a9b7a (patch) | |
| tree | 4c983fe736a4bdfc80f7a978011d01932ec85e02 /drivers/block | |
| parent | bc891c9ae3fb2848922e0f0da22fd7de0d58dc1b (diff) | |
| download | blackbird-obmc-linux-8747d30af97232f9ff4cde78b8d259cc715a9b7a.tar.gz blackbird-obmc-linux-8747d30af97232f9ff4cde78b8d259cc715a9b7a.zip | |
drbd: a few more GFP_KERNEL -> GFP_NOIO
This has not yet been observed, but conceivably, when using GFP_KERNEL
allocations from drbd_md_sync(), drbd_flush_after_epoch() or
receive_SyncParam(), we could trigger additional IO to our own device,
or an other device in a criss-cross setup, and end up in a local
deadlock, or potentially a distributed deadlock in a criss-cross setup
involving the peer blocked in a similar way waiting for us to make
progress.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/drbd/drbd_int.h | 2 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_worker.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index f223f01b4e1c..4aadd0818179 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -2294,7 +2294,7 @@ static inline void drbd_md_flush(struct drbd_conf *mdev) if (test_bit(MD_NO_FUA, &mdev->flags)) return; - r = blkdev_issue_flush(mdev->ldev->md_bdev, GFP_KERNEL, NULL); + r = blkdev_issue_flush(mdev->ldev->md_bdev, GFP_NOIO, NULL); if (r) { set_bit(MD_NO_FUA, &mdev->flags); dev_err(DEV, "meta data flush failed with status %d, disabling md-flushes\n", r); diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c index 377f27bbba17..d348260301f1 100644 --- a/drivers/block/drbd/drbd_worker.c +++ b/drivers/block/drbd/drbd_worker.c @@ -473,7 +473,7 @@ struct fifo_buffer *fifo_alloc(int fifo_size) { struct fifo_buffer *fb; - fb = kzalloc(sizeof(struct fifo_buffer) + sizeof(int) * fifo_size, GFP_KERNEL); + fb = kzalloc(sizeof(struct fifo_buffer) + sizeof(int) * fifo_size, GFP_NOIO); if (!fb) return NULL; |
