Messages in this thread | | | Date | Wed, 12 Feb 2014 14:42:30 +0100 | From | "Egger, Christoph" <> | Subject | Re: [Xen-devel] [PATCH v2 2/4] xen-blkback: fix memory leaks |
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On 07.02.14 04:15, Matthew Rushton wrote: > On 04/02/14 10:26, Roger Pau Monne wrote: >> I've at least identified two possible memory leaks in blkback, both >> related to the shutdown path of a VBD: >> >> - blkback doesn't wait for any pending purge work to finish before >> cleaning the list of free_pages. The purge work will call >> put_free_pages and thus we might end up with pages being added to >> the free_pages list after we have emptied it. Fix this by making >> sure there's no pending purge work before exiting >> xen_blkif_schedule, and moving the free_page cleanup code to >> xen_blkif_free. >> - blkback doesn't wait for pending requests to end before cleaning >> persistent grants and the list of free_pages. Again this can add >> pages to the free_pages list or persistent grants to the >> persistent_gnts red-black tree. Fixed by moving the persistent >> grants and free_pages cleanup code to xen_blkif_free. >> >> Also, add some checks in xen_blkif_free to make sure we are cleaning >> everything. > > Tested-by: Matt Rushton <mrushton@amazon.com> > Reviewed-by: Matt Rushton <mrushton@amazon.com>
Tested-by: Christoph Egger <chegger@amazon.de> Reviewed-by: Christoph Egger <chegger@amazon.de>
Christoph
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