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Groups > linux.kernel > #1467363
| From | Shaun Tancheff <shaun@tancheff.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 0/2] Change zone cache format to use less memory |
| Date | 2016-08-22 06:40 +0200 |
| Message-ID | <s8PbH-1um-3@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
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
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[PATCH 0/2] Change zone cache format to use less memory Shaun Tancheff <shaun@tancheff.com> - 2016-08-22 06:40 +0200
Re: [PATCH 2/2] Migrate zone cache from RB-Tree to arrays of descriptors Hannes Reinecke <hare@suse.de> - 2016-08-22 09:20 +0200
Re: [PATCH 2/2] Migrate zone cache from RB-Tree to arrays of descriptors Shaun Tancheff <shaun.tancheff@seagate.com> - 2016-08-22 17:50 +0200
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