From: Shaun Tancheff <shaun@tancheff.com>
To: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: Shaun Tancheff <shaun@tancheff.com>, Jens Axboe <axboe@kernel.dk>,
Jens Axboe <axboe@fb.com>, Christoph Hellwig <hch@lst.de>,
"James E . J . Bottomley" <jejb@linux.vnet.ibm.com>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
Damien Le Moal <damien.lemoal@hgst.com>,
Hannes Reinecke <hare@suse.de>,
Dan Williams <dan.j.williams@intel.com>,
Sagi Grimberg <sagig@mellanox.com>,
Mike Christie <mchristi@redhat.com>,
Ming Lei <ming.lei@canonical.com>,
Josh Bingaman <josh.bingaman@seagate.com>
Subject: [PATCH 0/2] Change zone cache format to use less memory
Date: Sun, 21 Aug 2016 23:34:00 -0500 [thread overview]
Message-ID: <20160822043402.8855-1-shaun@tancheff.com> (raw)
Currently the RB-Tree zone cache is fast and flexible. It does
use a rather largish amount of ram. This model reduces the ram
required from 120 bytes per zone to 16 bytes per zone with a
moderate transformation of the blk_zone_lookup() api.
This model is predicated on the belief that most variations
on zoned media will follow a pattern of using collections of same
sized zones on a single device. Similar to the pattern of erase
blocks on flash devices being progressivly larger 16K, 64K, ...
The goal is to be able to build a descriptor which is both memory
efficient, performant, and flexible.
Shaun Tancheff (2):
Move ZBC core setup to sd_zbc
Migrate zone cache from RB-Tree to arrays of descriptors
block/blk-core.c | 2 +-
block/blk-sysfs.c | 31 +-
block/blk-zoned.c | 103 +++--
drivers/scsi/sd.c | 66 +--
drivers/scsi/sd.h | 20 +-
drivers/scsi/sd_zbc.c | 1037 +++++++++++++++++++++++++++++-------------------
include/linux/blkdev.h | 82 +++-
7 files changed, 759 insertions(+), 582 deletions(-)
--
2.9.3
next reply other threads:[~2016-08-22 4:34 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-22 4:34 Shaun Tancheff [this message]
2016-08-22 4:34 ` [PATCH 1/2] Move ZBC core setup to sd_zbc Shaun Tancheff
2016-08-22 4:34 ` [PATCH 2/2] Migrate zone cache from RB-Tree to arrays of descriptors Shaun Tancheff
2016-08-22 5:25 ` Shaun Tancheff
2016-08-22 7:11 ` Hannes Reinecke
2016-08-22 7:11 ` Hannes Reinecke
2016-08-22 15:43 ` Shaun Tancheff
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