drbd: get rid of atomic update on disk bitmap works

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Just trigger the occasional lazy bitmap write-out during resync
from the central wait_for_work() helper.

Previously, during resync, bitmap pages would be written out separately,
synchronously, one at a time, at least 8 times each (every 512 bytes
worth of bitmap cleared).

Now we trigger "merge friendly" bulk write out of all cleared pages
every two seconds during resync, and once the resync is finished.
Most pages will be written out only once.

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

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This commit is contained in:

Lars Ellenberg 2013-12-20 11:39:48 +01:00 • committed by Philipp Reisner

parent 70df70927b

commit c7a58db4e9

5 changed files with 66 additions and 125 deletions

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63

drivers/block/drbd/drbd_actlog.c

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65

drivers/block/drbd/drbd_bitmap.c

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2

drivers/block/drbd/drbd_int.h

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7

drivers/block/drbd/drbd_nl.c

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54

drivers/block/drbd/drbd_worker.c

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