Re: [PATCH 1/1]: Thaws refrigerated bdi flusher threads before invoking kthread_stop on them
From: Pavel Machek <hidden>
Date: 2009-11-11 10:34:44
On Wed 2009-11-11 14:00:16, Romit Dasgupta wrote:
Kicks out frozen bdi flusher task out of the refrigerator when the flusher task needs to exit.
Signed-off-by: Romit Dasgupta <redacted>
Ok, its slightly "interesting", but better than modifying common code. Looks ok to me. ACK. Pavel
quoted hunk
---diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 5a37e20..c757b05 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c@@ -606,8 +606,11 @@ static void bdi_wb_shutdown(struct backing_dev_info *bdi) * Finally, kill the kernel threads. We don't need to be RCU * safe anymore, since the bdi is gone from visibility. */ - list_for_each_entry(wb, &bdi->wb_list, list) + list_for_each_entry(wb, &bdi->wb_list, list) { + if (unlikely(frozen(wb->task))) + wb->task->flags &= ~PF_FROZEN; kthread_stop(wb->task); + } } void bdi_unregister(struct backing_dev_info *bdi)
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