virtio-mem: retry fake-offlining via alloc_contig_range() on ZONE_MOVABLE

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ZONE_MOVABLE is supposed to give some guarantees, yet,
alloc_contig_range() isn't prepared to properly deal with some racy
cases properly (e.g., temporary page pinning when exiting processed, PCP).

Retry 5 times for now. There is certainly room for improvement in the
future.

Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20201112133815.13332-11-david@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

...

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David Hildenbrand 2020-11-12 14:37:56 +01:00 • committed by Michael S. Tsirkin

parent 7a34c77dab

commit f2d799d591

1 changed files with 26 additions and 11 deletions

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drivers/virtio/virtio_mem.c

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