tmakin/tegra-linux-noble
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

block: stack max_user_sectors

Browse Source 
BugLink: https://bugs.launchpad.net/bugs/2073603

[ Upstream commit e528bede6f4e6822afdf0fa80be46ea9199f0911 ]

The max_user_sectors is one of the three factors determining the actual
max_sectors limit for READ/WRITE requests.  Because of that it needs to
be stacked at least for the device mapper multi-path case where requests
are directly inserted on the lower device.  For SCSI disks this is
important because the sd driver actually sets it's own advisory limit
that is lower than max_hw_sectors based on the block limits VPD page.
While this is a bit odd an unusual, the same effect can happen if a
user or udev script tweaks the value manually.

Fixes: 4f563a64732d ("block: add a max_user_discard_sectors queue limit")
Reported-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Mike Snitzer <snitzer@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240523182618.602003-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Portia Stephens <portia.stephens@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>
This commit is contained in:
Christoph Hellwig
2024-05-23 20:26:14 +02:00
committed by Roxana Nicolescu
parent 1cfa381dc4
commit 5f1dd96837
1 changed files with 2 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
block/blk-settings.c
+2
View File
@@ -559,6 +559,8 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
unsigned int top, bottom, alignment, ret = 0;
t->max_sectors = min_not_zero(t->max_sectors, b->max_sectors);
t->max_user_sectors = min_not_zero(t->max_user_sectors,
b->max_user_sectors);
t->max_hw_sectors = min_not_zero(t->max_hw_sectors, b->max_hw_sectors);
t->max_dev_sectors = min_not_zero(t->max_dev_sectors, b->max_dev_sectors);
t->max_write_zeroes_sectors = min(t->max_write_zeroes_sectors,