Re: [Xen-devel] [PATCH v7 7/9] mm: Keep heap accessible to others while scrubbing

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 08.08.17 at 23:45, <boris.ostrovsky@xxxxxxxxxx> wrote:
> Instead of scrubbing pages while holding heap lock we can mark
> buddy's head as being scrubbed and drop the lock temporarily.
> If someone (most likely alloc_heap_pages()) tries to access
> this chunk it will signal the scrubber to abort scrub by setting
> head's BUDDY_SCRUB_ABORT bit. The scrubber checks this bit after
> processing each page and stops its work as soon as it sees it.
> 
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>



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