From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, linux-nvme@lists.infradead.org
Subject: support for multi-range discard requests V3
Date: Wed, 8 Feb 2017 14:46:46 +0100 [thread overview]
Message-ID: <20170208134650.5380-1-hch@lst.de> (raw)
Hi all,
this series adds support for merging discontiguous discard bios into a
single request if the driver supports it. This reduces the number of
discards sent to the device by about a factor of 5-6 for typical
workloads on NVMe, and for slower devices that use I/O scheduling
the number will probably be even bigger but I've not implemented
that support yet.
Changes since V2:
- really fix nr of NVMe ranges to 256
- free range on error
Changes since V1:
- hardcoded max ranges for NVMe to 255
- minor cleanups
WARNING: multiple messages have this Message-ID (diff)
From: hch@lst.de (Christoph Hellwig)
Subject: support for multi-range discard requests V3
Date: Wed, 8 Feb 2017 14:46:46 +0100 [thread overview]
Message-ID: <20170208134650.5380-1-hch@lst.de> (raw)
Hi all,
this series adds support for merging discontiguous discard bios into a
single request if the driver supports it. This reduces the number of
discards sent to the device by about a factor of 5-6 for typical
workloads on NVMe, and for slower devices that use I/O scheduling
the number will probably be even bigger but I've not implemented
that support yet.
Changes since V2:
- really fix nr of NVMe ranges to 256
- free range on error
Changes since V1:
- hardcoded max ranges for NVMe to 255
- minor cleanups
next reply other threads:[~2017-02-08 13:46 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-08 13:46 Christoph Hellwig [this message]
2017-02-08 13:46 ` support for multi-range discard requests V3 Christoph Hellwig
2017-02-08 13:46 ` [PATCH 1/4] block: move req_set_nomerge to blk.h Christoph Hellwig
2017-02-08 13:46 ` Christoph Hellwig
2017-02-08 13:46 ` [PATCH 2/4] block: enumify ELEVATOR_*_MERGE Christoph Hellwig
2017-02-08 13:46 ` Christoph Hellwig
2017-02-08 13:46 ` [PATCH 3/4] block: optionally merge discontiguous discard bios into a single request Christoph Hellwig
2017-02-08 13:46 ` Christoph Hellwig
2017-02-08 13:46 ` [PATCH 4/4] nvme: support ranged discard requests Christoph Hellwig
2017-02-08 13:46 ` Christoph Hellwig
2017-02-15 10:45 ` Sagi Grimberg
2017-02-15 10:45 ` Sagi Grimberg
2017-02-08 17:45 ` support for multi-range discard requests V3 Jens Axboe
2017-02-08 17:45 ` Jens Axboe
2017-02-15 10:43 ` Sagi Grimberg
2017-02-15 10:43 ` Sagi Grimberg
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