redonkable
/
remarkable-linux
1
0
Fork 0
Code Releases Activity

rbd: set max_segments to USHRT_MAX 

commit 21acdf45f4 upstream.

Commit d3834fefcf ("rbd: bump queue_max_segments") bumped
max_segments (unsigned short) to max_hw_sectors (unsigned int).
max_hw_sectors is set to the number of 512-byte sectors in an object
and overflows unsigned short for 32M (largest possible) objects, making
the block layer resort to handing us single segment (i.e. single page
or even smaller) bios in that case.

Fixes: d3834fefcf ("rbd: bump queue_max_segments")
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Ilya Dryomov 2017-12-21 15:35:11 +01:00 committed by Greg Kroah-Hartman
parent e068cdee63
commit 0b5e3dbf47
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/block/rbd.c
View File

@ -4421,7 +4421,7 @@ static int rbd_init_disk(struct rbd_device *rbd_dev)
segment_size = rbd_obj_bytes(&rbd_dev->header);
blk_queue_max_hw_sectors(q, segment_size / SECTOR_SIZE);
q->limits.max_sectors = queue_max_hw_sectors(q);
blk_queue_max_segments(q, segment_size / SECTOR_SIZE);
blk_queue_max_segments(q, USHRT_MAX);
blk_queue_max_segment_size(q, segment_size);
blk_queue_io_min(q, segment_size);
blk_queue_io_opt(q, segment_size);