From: "Matias Bjørling" <m@bjorling.me>
To: Ming Lin-SSI <ming.l@ssi.samsung.com>, Jens Axboe <axboe@fb.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH 1/6] block: add support for carrying a stream ID in a bio
Date: Wed, 25 Mar 2015 09:11:14 +0100 [thread overview]
Message-ID: <55126DA2.5010004@bjorling.me> (raw)
In-Reply-To: <3A47B4705F6BE24CBB43C61AA73286215067DA@SSIEXCH-MB3.ssi.samsung.com>
>> Pushing it higher is not a big deal as far as the implementation goes, though
>> 16 bits might be stealing a bit too much space for this. On 32-bit archs, we
>> have 18 bits currently free that we can abuse. The Samsung device supports
>> 16 streams. That's honestly a lot more than I would expect most devices to
>> support in hardware, 16 is a lot of open erase blocks and write append points.
>> Obviously the open channel effort would make that more feasible, though.
>
> Can we use 8 bits at least? I'll test performance with 16 streams.
>
Ming, can you provide an example of how streams will be managed for
multiple applications? I can see how it would be efficient for a single
application, but how will it be managed for multiple applications?
-Matias
next prev parent reply other threads:[~2015-03-25 8:11 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-24 15:26 [PATCH RFC] Support for write stream IDs Jens Axboe
2015-03-24 15:26 ` [PATCH 1/6] block: add support for carrying a stream ID in a bio Jens Axboe
2015-03-24 17:11 ` Matias Bjørling
2015-03-24 17:26 ` Jens Axboe
2015-03-24 22:07 ` Ming Lin-SSI
2015-03-25 1:42 ` Jens Axboe
2015-03-25 8:11 ` Matias Bjørling [this message]
2015-03-25 18:36 ` Ming Lin-SSI
2015-03-25 2:30 ` Dave Chinner
2015-04-12 10:42 ` Dmitry Monakhov
2015-03-24 15:26 ` [PATCH 2/6] Add support for per-file stream ID Jens Axboe
2015-03-24 15:27 ` [PATCH 3/6] direct-io: add support for write stream IDs Jens Axboe
2015-03-25 2:43 ` Dave Chinner
2015-03-25 14:26 ` Jens Axboe
2015-04-10 23:50 ` Ming Lin
2015-04-11 0:06 ` Ming Lin
2015-04-11 11:59 ` Dave Chinner
2015-04-17 6:20 ` Ming Lin
2015-04-17 23:06 ` Dave Chinner
2015-04-17 23:11 ` Jens Axboe
2015-04-17 23:51 ` Dave Chinner
2015-04-18 2:00 ` Jens Axboe
2015-04-17 15:17 ` Jens Axboe
2015-03-24 15:27 ` [PATCH 4/6] Add stream ID support for buffered writeback Jens Axboe
2015-03-25 2:40 ` Dave Chinner
2015-03-25 14:17 ` Jens Axboe
2015-03-24 15:27 ` [PATCH 5/6] btrfs: add support for buffered writeback stream ID Jens Axboe
2015-03-24 15:27 ` [PATCH 6/6] xfs: " Jens Axboe
2015-03-25 2:41 ` Dave Chinner
2015-03-24 17:03 ` [PATCH RFC] Support for write stream IDs Jeff Moyer
2015-03-24 17:08 ` Jens Axboe
2015-03-24 21:46 ` Ming Lin-SSI
2015-03-24 21:48 ` Jens Axboe
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