Ming Lei 87aa69aa10 block: return ELEVATOR_DISCARD_MERGE if possible ... [ Upstream commit 866663b7b5 ] When merging one bio to request, if they are discard IO and the queue supports multi-range discard, we need to return ELEVATOR_DISCARD_MERGE because both block core and related drivers(nvme, virtio-blk) doesn't handle mixed discard io merge(traditional IO merge together with discard merge) well. Fix the issue by returning ELEVATOR_DISCARD_MERGE in this situation, so both blk-mq and drivers just need to handle multi-range discard. Reported-by: Oleksandr Natalenko <oleksandr@natalenko.name> Signed-off-by: Ming Lei <ming.lei@redhat.com> Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name> Fixes: 2705dfb209 ("block: fix discard request merge") Link: https://lore.kernel.org/r/20210729034226.1591070-1-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-09-15 09:50:28 +02:00
..
acpi	ACPI: fix NULL pointer dereference	2021-08-08 09:05:23 +02:00
asm-generic	vmlinux.lds.h: Handle clang's module.{c,d}tor sections	2021-08-18 08:59:18 +02:00
clocksource	clocksource/drivers/timer-ti-dm: Save and restore timer TIOCP_CFG	2021-07-14 16:56:12 +02:00
crypto	crypto: shash - avoid comparing pointers to exported functions under CFI	2021-07-14 16:55:54 +02:00
drm	drm: Return -ENOTTY for non-drm ioctls	2021-07-28 14:35:47 +02:00
dt-bindings	clk: imx8mq: remove SYS PLL 1/2 clock gates	2021-07-14 16:56:20 +02:00
keys	certs: Add EFI_CERT_X509_GUID support for dbx entries	2021-06-30 08:47:30 -04:00
kunit
kvm
linux	block: return ELEVATOR_DISCARD_MERGE if possible	2021-09-15 09:50:28 +02:00
math-emu
media	media: subdev: disallow ioctl for saa6588/davinci	2021-07-19 09:45:02 +02:00
memory
misc
net	Revert "flow_offload: action should not be NULL when it is referenced"	2021-08-26 08:35:52 -04:00
pcmcia
ras
rdma
scsi	scsi: iscsi: Fix conn use after free during resets	2021-07-20 16:05:41 +02:00
soc
sound
target
trace	afs: Fix tracepoint string placement with built-in AFS	2021-07-28 14:35:41 +02:00
uapi	tty: drop termiox user definitions	2021-09-12 08:58:27 +02:00
vdso
video
xen