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drbd: report congestion if we are waiting for some userland callback
authorLars Ellenberg <lars.ellenberg@linbit.com>
Mon, 30 Jul 2012 07:08:25 +0000 (09:08 +0200)
committerPhilipp Reisner <philipp.reisner@linbit.com>
Thu, 8 Nov 2012 15:58:39 +0000 (16:58 +0100)
If the drbd worker thread is synchronously waiting for some userland
callback, we don't want some casual pageout to block on us.
Have drbd_congested() report congestion in that case.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

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