Messages in this thread | | | Date | Fri, 17 Jun 2022 08:04:29 -0600 | From | Keith Busch <> | Subject | Re: [PATCH RFC -next] sbitmap: fix possible io hung due to lost wakeups |
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On Fri, Jun 17, 2022 at 10:11:25PM +0800, Yu Kuai wrote: > > What's worse, io hung is possible in theory because wakeups might be > missed. For example, 2 * wake_batch tags are put, while only wake_batch > threads are worken:
Not just in theory, io hanging sounds like the problem reported here:
https://bugzilla.kernel.org/show_bug.cgi?id=215679
I only knew that it had nothing to do with the nvme driver, though, but they closed the bug after it stopped happening with different hardware.
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