Damien Le Moal e1777d0997 null_blk: Fix scheduling in atomic with zoned mode ... Commit aa1c09cb65 ("null_blk: Fix locking in zoned mode") changed zone locking to using the potentially sleeping wait_on_bit_io() function. This is acceptable when memory backing is enabled as the device queue is in that case marked as blocking, but this triggers a scheduling while in atomic context with memory backing disabled. Fix this by relying solely on the device zone spinlock for zone information protection without temporarily releasing this lock around null_process_cmd() execution in null_zone_write(). This is OK to do since when memory backing is disabled, command processing does not block and the memory backing lock nullb->lock is unused. This solution avoids the overhead of having to mark a zoned null_blk device queue as blocking when memory backing is unused. This patch also adds comments to the zone locking code to explain the unusual locking scheme. Fixes: aa1c09cb65 ("null_blk: Fix locking in zoned mode") Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: stable@vger.kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>		2020-11-06 09:36:42 -07:00
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aoe	…
drbd	block-5.10-2020-10-12	2020-10-13 12:12:44 -07:00
mtip32xx	…
paride	…
rnbd	block/rnbd-clt: send_msg_close if any error occurs after send_msg_open	2020-10-13 15:05:05 -06:00
rsxx	rsxx: Use fallthrough pseudo-keyword	2020-10-02 17:54:45 -06:00
xen-blkback	xen-blkback: add a parameter for disabling of persistent grants	2020-10-21 07:15:13 -05:00
zram	block-5.10-2020-10-24	2020-10-24 12:46:42 -07:00
Kconfig	…
Makefile	…
amiflop.c	…
ataflop.c	…
brd.c	…
cryptoloop.c	…
floppy.c	…
loop.c	…
loop.h	…
nbd.c	nbd: don't update block size after device is started	2020-10-29 07:25:43 -06:00
null_blk.h	null_blk: Fix scheduling in atomic with zoned mode	2020-11-06 09:36:42 -07:00
null_blk_main.c	null_blk: add support for max open/active zone limit for zoned devices	2020-09-29 08:12:48 -06:00
null_blk_trace.c	…
null_blk_trace.h	…
null_blk_zoned.c	null_blk: Fix scheduling in atomic with zoned mode	2020-11-06 09:36:42 -07:00
pktcdvd.c	…
ps3disk.c	…
ps3vram.c	…
rbd.c	We have:	2020-10-21 10:34:10 -07:00
rbd_types.h	…
skd_main.c	skd_main: remove unused including <linux/version.h>	2020-10-17 08:11:14 -06:00
skd_s1120.h	…
sunvdc.c	…
swim.c	…
swim3.c	…
swim_asm.S	…
sx8.c	…
umem.c	…
umem.h	…
virtio_blk.c	…
xen-blkfront.c	xen-blkfront: add a parameter for disabling of persistent grants	2020-10-21 07:15:15 -05:00
xsysace.c	xsysace: use platform_get_resource() and platform_get_irq_optional()	2020-10-29 08:22:33 -06:00
z2ram.c	…