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Javier González 013b559adf lightnvm: pblk: fix race condition on metadata I/O

[ Upstream commit d8adaa3b86 ]

In pblk, when a new line is allocated, metadata for the previously
written line is scheduled. This is done through a fixed memory region
that is shared through time and contexts across different lines and
therefore protected by a lock. Unfortunately, this lock is not properly
covering all the metadata used for sharing this memory regions,
resulting in a race condition.

This patch fixes this race condition by protecting this metadata
properly.

Fixes: dd2a434373 ("lightnvm: pblk: sched. metadata on write thread")
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-11-13 11:08:21 -08:00

core.c

lightnvm: pass flag on graceful teardown to targets

2018-06-01 07:43:53 -06:00

Kconfig

lightnvm: move NVM_DEBUG to pblk

2018-07-13 08:14:31 -06:00

Makefile

lightnvm: remove rrpc

2018-01-05 08:50:12 -07:00

pblk-cache.c

block: Add and use op_stat_group() for indexing disk_stat fields.