tree 98d268644fff7121bc9063488d9dcadea4fa7f53
parent 501378c3af16e8e83a9dd500c11e594f4d1dbe79
author Paolo Bonzini <pbonzini@redhat.com> 1358177218 +0100
committer Stefan Hajnoczi <stefanha@redhat.com> 1358240628 +0100

block: clear dirty bitmap when discarding

Note that resetting bits in the dirty bitmap is done _before_ actually
processing the request.  Writes, instead, set bits after the request
is completed.

This way, when there are concurrent write and discard requests, the
outcome will always be that the blocks are marked dirty.  This scenario
should never happen, but it is safer to do it this way.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>