]> git.baikalelectronics.ru Git - kernel.git/commit
block: Invalidate cache on discard v2
authorDmitry Monakhov <dmonakhov@openvz.org>
Wed, 25 Oct 2017 00:44:57 +0000 (18:44 -0600)
committerJens Axboe <axboe@kernel.dk>
Wed, 25 Oct 2017 00:44:57 +0000 (18:44 -0600)
commit2095031980aceb0426eb09f07840de9c4a92d072
treef4ae426a9204fe49711a0d79f57d825fc7063706
parente1257e89cf089430a90beb4a63ef16f8d323508b
block: Invalidate cache on discard v2

It is reasonable drop page cache on discard, otherwise that pages may
be written by writeback second later, so thin provision devices will
not be happy. This seems to be a  security leak in case of secure discard case.

Also add check for queue_discard flag on early stage.

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/ioctl.c