drbd: Defer new writes when detecting conflicting writes

Browse source

Before submitting a new local write request, wait for any conflicting
local or remote requests to complete.

We could assume that the new request occurred first and that the
conflicting requests overwrote it (and therefore discard the new
reques), but we know for sure that the new request occurred after the
conflicting requests and so this behavior would we weird.  We would also
end up with the wrong result if the new request is not fully contained
within the conflicting requests.

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

...

This commit is contained in:

Andreas Gruenbacher 2011-01-28 15:53:51 +01:00 • committed by Philipp Reisner

parent ddd8877d31

commit 6024fece73

1 changed files with 39 additions and 64 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

103

drivers/block/drbd/drbd_req.c

View file