From: Christoph Hellwig <hch@infradead.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org,
linux-nvme@lists.infradead.org
Subject: Re: [PATCHSET 0/5] Enable alloc caching and batched freeing for passthrough
Date: Fri, 23 Sep 2022 08:16:24 -0700 [thread overview]
Message-ID: <Yy3NyACongSfayY+@infradead.org> (raw)
In-Reply-To: <20220922182805.96173-1-axboe@kernel.dk>
On Thu, Sep 22, 2022 at 12:28:00PM -0600, Jens Axboe wrote:
> This is good for a 10% improvement for passthrough performance. For
> a non-drive limited test case, passthrough IO is now more efficient
> than the regular bdev O_DIRECT path.
How so? If it ends up faster we are doing something wrong in the
normal path as there should be no fundamental difference in the work
that is being done.
next prev parent reply other threads:[~2022-09-23 15:16 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-22 18:28 [PATCHSET 0/5] Enable alloc caching and batched freeing for passthrough Jens Axboe
2022-09-22 18:28 ` [PATCH 1/5] block: enable batched allocation for blk_mq_alloc_request() Jens Axboe
2022-09-23 14:52 ` Pankaj Raghav
2022-09-23 15:13 ` Pankaj Raghav
2022-09-23 20:54 ` Jens Axboe
2022-09-24 0:59 ` Damien Le Moal
2022-09-24 1:01 ` Jens Axboe
2022-09-24 1:22 ` Damien Le Moal
2022-09-24 11:56 ` Pankaj Raghav
2022-09-24 14:44 ` Jens Axboe
2022-09-22 18:28 ` [PATCH 2/5] block: change request end_io handler to pass back a return value Jens Axboe
2022-09-22 18:28 ` [PATCH 3/5] block: allow end_io based requests in the completion batch handling Jens Axboe
2022-09-22 18:28 ` [PATCH 4/5] nvme: split out metadata vs non metadata end_io uring_cmd completions Jens Axboe
2022-09-23 15:21 ` Christoph Hellwig
2022-09-23 20:52 ` Jens Axboe
2022-09-26 14:41 ` Christoph Hellwig
2022-09-26 14:41 ` Jens Axboe
2022-09-26 14:43 ` Christoph Hellwig
2022-09-26 14:50 ` Jens Axboe
2022-09-26 14:52 ` Christoph Hellwig
2022-09-26 14:54 ` Jens Axboe
2022-09-22 18:28 ` [PATCH 5/5] nvme: enable batched completions of passthrough IO Jens Axboe
2022-09-23 15:16 ` Christoph Hellwig [this message]
2022-09-23 15:19 ` [PATCHSET 0/5] Enable alloc caching and batched freeing for passthrough Jens Axboe
2022-09-23 15:21 ` Christoph Hellwig
2022-09-23 15:22 ` Jens Axboe
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