From: Hannes Reinecke <hare@suse.de>
To: Damien Le Moal <damien.lemoal@wdc.com>,
linux-block@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
linux-scsi@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>,
dm-devel@redhat.com, Mike Snitzer <snitzer@redhat.com>,
linux-f2fs-devel@lists.sourceforge.net,
Jaegeuk Kim <jaegeuk@kernel.org>, Chao Yu <yuchao0@huawei.com>
Subject: Re: [f2fs-dev] [PATCH 8/9] scsi: sd_zbc: Cleanup sd_zbc_alloc_report_buffer()
Date: Fri, 8 Nov 2019 08:20:20 +0100 [thread overview]
Message-ID: <80bfc0e8-860d-3c11-07f4-08b7dd7fada4@suse.de> (raw)
In-Reply-To: <20191108015702.233102-9-damien.lemoal@wdc.com>
On 11/8/19 2:57 AM, Damien Le Moal wrote:
> There is no need to arbitrarily limit the size of a report zone to the
> number of zones defined by SD_ZBC_REPORT_MAX_ZONES. Rather, simply
> calculate the report buffer size needed for the requested number of
> zones without exceeding the device total number of zones. This buffer
> size limitation to the hardware maximum transfer size and page mapping
> capabilities is kept unchanged. Starting with this initial buffer size,
> the allocation is optimized by iterating over decreasing buffer size
> until the allocation succeeds. This ensures forward progress for zone
> reports and avoids failures of zones revalidation under memory pressure.
>
> While at it, also replace the hard coded 512 B sector size with the
> SECTOR_SIZE macro.
>
> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
> ---
> drivers/scsi/sd_zbc.c | 22 +++++++++++-----------
> 1 file changed, 11 insertions(+), 11 deletions(-)
>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Cheers,
Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
hare@suse.de +49 911 74053 688
SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 247165 (AG München), GF: Felix Imendörffer
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next prev parent reply other threads:[~2019-11-08 7:20 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-08 1:56 [f2fs-dev] [PATCH 0/9] Zoned block device enhancements and zone report rework Damien Le Moal
2019-11-08 1:56 ` [f2fs-dev] [PATCH 1/9] block: Enhance blk_revalidate_disk_zones() Damien Le Moal
2019-11-08 6:28 ` [f2fs-dev] [dm-devel] " Christoph Hellwig
2019-11-08 7:10 ` [f2fs-dev] " Hannes Reinecke
2019-11-08 1:56 ` [f2fs-dev] [PATCH 2/9] block: cleanup the !zoned case in blk_revalidate_disk_zones Damien Le Moal
2019-11-08 7:11 ` Hannes Reinecke
2019-11-08 18:50 ` Chaitanya Kulkarni
2019-11-08 1:56 ` [f2fs-dev] [PATCH 3/9] block: Simplify report zones execution Damien Le Moal
2019-11-08 7:12 ` Hannes Reinecke
2019-11-08 1:56 ` [f2fs-dev] [PATCH 4/9] block: Remove partition support for zoned block devices Damien Le Moal
2019-11-08 6:30 ` [f2fs-dev] [dm-devel] " Christoph Hellwig
2019-11-08 7:17 ` [f2fs-dev] " Hannes Reinecke
2019-11-08 7:28 ` Damien Le Moal
2019-11-08 1:56 ` [f2fs-dev] [PATCH 5/9] null_blk: clean up the block device operations Damien Le Moal
2019-11-08 7:17 ` Hannes Reinecke
2019-11-08 18:47 ` Chaitanya Kulkarni
2019-11-08 1:56 ` [f2fs-dev] [PATCH 6/9] null_blk: clean up report zones Damien Le Moal
2019-11-08 7:18 ` Hannes Reinecke
2019-11-08 18:47 ` Chaitanya Kulkarni
2019-11-08 1:57 ` [f2fs-dev] [PATCH 7/9] null_blk: Add zone_nr_conv to features Damien Le Moal
2019-11-08 7:18 ` Hannes Reinecke
2019-11-08 18:48 ` Chaitanya Kulkarni
2019-11-08 1:57 ` [f2fs-dev] [PATCH 8/9] scsi: sd_zbc: Cleanup sd_zbc_alloc_report_buffer() Damien Le Moal
2019-11-08 6:31 ` [f2fs-dev] [dm-devel] " Christoph Hellwig
2019-11-08 7:20 ` Hannes Reinecke [this message]
2019-11-08 19:06 ` Bart Van Assche
2019-11-09 2:54 ` Damien Le Moal
2019-11-09 3:02 ` Bart Van Assche
2019-11-08 1:57 ` [f2fs-dev] [PATCH 9/9] block: rework zone reporting Damien Le Moal
2019-11-08 7:23 ` Hannes Reinecke
2019-11-08 15:16 ` Mike Snitzer
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