[dm-devel] [node-devel] [ovirt-devel] blockdev --flushbufs required [was: parted issue/question

[Alan Pevec]

> On Wed, 2012-01-18 at 14:44 +0100, Jim Meyering wrote:
>> [Following up on this thread:
>>  http://thread.gmane.org/gmane.linux.kernel.device-mapper.devel/14999]
>> Alasdair G Kergon wrote:
>> > Try
>> >   blkdev --flushbufs
>> > after any cmd that writes to a dev to see if that makes any difference.
>>
>> Thanks for the work-around.
>> Using "blockdev --flushbufs $dev" does indeed make parted
>> behave the same with dm-backed storage as with other devices.

Thanks Jim!
That reminds me we've already seen something similar and there's still
workaround with drop_caches in ovirt-config-boot installer:
            # flush to sync DM and blockdev, workaround from rhbz#623846#c14
            echo 3 > /proc/sys/vm/drop_caches

But 623846 was supposed to be fixed in RHEL 6.0 ?

Alan