From: Jiri Kosina <[email protected]>

xen_blkif_schedule() kthread calls try_to_freeze() at the beginning of 
every attempt to purge the LRU. This operation can't ever succeed though, 
as the kthread hasn't marked itself as freezable.

Before (hopefully eventually) kthread freezing gets converted to fileystem 
freezing, we'd rather mark xen_blkif_schedule() freezable (as it can 
generate I/O during suspend).

Signed-off-by: Jiri Kosina <[email protected]>
---
 drivers/block/xen-blkback/blkback.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/block/xen-blkback/blkback.c 
b/drivers/block/xen-blkback/blkback.c
index af3caa3..bb65f7c 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -597,6 +597,7 @@ int xen_blkif_schedule(void *arg)
 
        xen_blkif_get(blkif);
 
+       set_freezable();
        while (!kthread_should_stop()) {
                if (unlikely(vbd->size != vbd_sz(vbd)))
                        xen_vbd_resize(blkif);

-- 
Jiri Kosina
SUSE Labs
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