Messages in this thread | | | Subject | Re: [RFC] iomap: fix race between readahead and direct write | From | "yukuai (C)" <> | Date | Fri, 17 Jan 2020 17:39:03 +0800 |
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On 2020/1/16 23:32, Jan Kara wrote: > Thanks for the report and the patch. But the data integrity when mixing > buffered and direct IO like this is best effort only. We definitely do not > want to sacrifice performance of common cases or code complexity to make > cases like this work reliably.
In the patch, the only thing that is diffrent is that iomap_begin() will be called for each page. However, it seems the performance in sequential read didn't get worse. Is there a specific case that the performance will get worse?
Thanks! Yu Kuai!
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