Messages in this thread | | | Subject | Re: [PATCH RFC 1/2] fs/iomap/direct-io: pass NOWAIT to bio flags | From | Konstantin Khlebnikov <> | Date | Mon, 4 May 2020 19:23:50 +0300 |
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On 04/05/2020 19.00, Christoph Hellwig wrote: > On Mon, May 04, 2020 at 06:54:53PM +0300, Konstantin Khlebnikov wrote: >> This is required to avoid waiting in lower layers. >> >> Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> > > This looks sensible. Did you run this through xfstests? >
Nope. It seems xfstests has one trivial test for NOWAIT - generic/471 It tests only write with/without extent, nothing about contention.
I've added nowait into fio and played with it a little. https://github.com/axboe/fio/pull/972
With these patches I see EAGAINs when queue is flooded.
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