From: Lars Ellenberg <lars.ellenberg@linbit.com>
Date: Mon, 25 Jun 2012 17:15:38 +0000 (+0200)
Subject: drbd: announce FLUSH/FUA capability to upper layers
X-Git-Tag: v3.6-rc1~6^2~9^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a73ff3231df59a4b92ccd0dd4e73897c5822489b;p=pandora-kernel.git

drbd: announce FLUSH/FUA capability to upper layers

Unconditionally announce FLUSH/FUA to upper layers.
If the lower layers on either node do not actually support this,
generic_make_request() will deal with it.

If this causes performance regressions on your setup,
make sure there are no volatile caches involved,
and mount -o nobarrier or equivalent.

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