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Date: Tue, 5 May 2009 17:03:13 +0200
Message-ID: <e2e108260905050803m4d474702o5ddc741b29325f54@mail.gmail.com>
Subject: Re: [PATCH 00/16] DRBD: a block device for HA clusters
From: Bart Van Assche <bart.vanassche@gmail.com>
To: Philipp Reisner <philipp.reisner@linbit.com>
Cc: James Bottomley <James.Bottomley@hansenpartnership.com>, david@lang.hm,
       Willy Tarreau <w@1wt.eu>, Andrew Morton <akpm@linux-foundation.org>,
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       Sam Ravnborg <sam@ravnborg.org>, Dave Jones <davej@redhat.com>,
       Nikanth Karthikesan <knikanth@suse.de>,
       Lars Marowsky-Bree <lmb@suse.de>, Kyle Moffett <kyle@moffetthome.net>,
       Lars Ellenberg <lars.ellenberg@linbit.com>
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On Tue, May 5, 2009 at 10:21 AM, Philipp Reisner
<philipp.reisner@linbit.com> wrote:
> What we have in DRBD boils down to:
>
> * We obey all possible write after write dependencies in the stream of
>  writes we get from the upper layers. And generate DRBD internal
>  reorder barriers for the packet stream.

Hello Philipp,

I couldn't find a call to blk_queue_ordered() in the DRBD 8.3.1 source
code. This made me wonder how DRBD obtains information about barriers
that is generated by filesystems like ext3 with the option barrier=1 ?

Bart.