Re: [PATCH] blk-mq: allow 4x BLK_MAX_REQUEST_COUNT at blk_plug for multiple_queues
From: Jens Axboe <axboe@kernel.dk>
Date: 2021-09-07 23:05:37
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On 9/7/21 5:03 PM, Song Liu wrote:
Limiting number of request to BLK_MAX_REQUEST_COUNT at blk_plug hurts performance for large md arrays. [1] shows resync speed of md array drops for md array with more than 16 HDDs. Fix this by allowing more request at plug queue. The multiple_queue flag is used to only apply higher limit to multiple queue cases.
Applied, thanks. -- Jens Axboe