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Commit 2ed912e9 authored by Lars Ellenberg's avatar Lars Ellenberg Committed by Philipp Reisner
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drbd: explicitly submit meta data requests with REQ_NOIDLE 



For some reason we have assumed NOIDLE was implied
by one of the other flags we set. It is not (anymore?).
Explicitly set REQ_NOIDLE for synchronous meta data updates,
or we can seriously starve random writes when using CFQ.

Signed-off-by: default avatarPhilipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: default avatarLars Ellenberg <lars.ellenberg@linbit.com>
parent 720979fb

drivers/block/drbd/drbd_actlog.c

+1 −1
Original line number Diff line number Diff line
@@ -150,7 +150,7 @@ static int _drbd_md_sync_page_io(struct drbd_device *device, 


	if ((rw & WRITE) && !test_bit(MD_NO_FUA, &device->flags))

		rw |= REQ_FUA | REQ_FLUSH;

	rw |= REQ_SYNC;

	rw |= REQ_SYNC | REQ_NOIDLE;



	bio = bio_alloc_drbd(GFP_NOIO);

	bio->bi_bdev = bdev->md_bdev;