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SubjectRe: lowlatency-2.2.14-B1 + 2.2.14aa7 fixes crash, but...
Hi,

On Tue, 22 Feb 2000 16:21:40 +0100 (CET), Andrea Arcangeli
<andrea@suse.de> said:

>> On the contrary --- in 2.2, brelse has always been able to block. It
>> performs an implicit refile_buffer(), which can block for write
>> throttling.

> refile_buffer blocks only if the buffer is been marked dirty and it wasn't
> in the dirty lru list.

> How can a dirty buffer not be in the dirty lru list at brelse time?

OK, that looks like a good reason.

> I assumed the refile buffer there was for cleanup and not for write
> throttling (that's the only case that can block).

Yes, it's definitely needed at least to remove buffers from the locked
and/or dirty lists if IO has completed by that point.

--Stephen

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