acrn-kernel/fs/verity
Eric Biggers 0b0e1551ba fsverity: don't drop pagecache at end of FS_IOC_ENABLE_VERITY
[ Upstream commit a075bacde2 ]

The full pagecache drop at the end of FS_IOC_ENABLE_VERITY is causing
performance problems and is hindering adoption of fsverity.  It was
intended to solve a race condition where unverified pages might be left
in the pagecache.  But actually it doesn't solve it fully.

Since the incomplete solution for this race condition has too much
performance impact for it to be worth it, let's remove it for now.

Fixes: 3fda4c617e ("fs-verity: implement FS_IOC_ENABLE_VERITY ioctl")
Cc: stable@vger.kernel.org
Reviewed-by: Victor Hsieh <victorhsieh@google.com>
Link: https://lore.kernel.org/r/20230314235332.50270-1-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-04-06 12:10:34 +02:00
..
Kconfig fs-verity: mention btrfs support 2022-07-15 23:42:30 -07:00
Makefile
enable.c fsverity: don't drop pagecache at end of FS_IOC_ENABLE_VERITY 2023-04-06 12:10:34 +02:00
fsverity_private.h btrfs: send: add support for fs-verity 2022-09-26 12:27:55 +02:00
hash_algs.c
init.c
measure.c fs-verity: define a function to return the integrity protected file digest 2022-05-01 16:39:36 -04:00
open.c fs-verity: remove unused parameter desc_size in fsverity_create_info() 2022-05-18 11:01:31 -07:00
read_metadata.c fs-verity: use kmap_local_page() instead of kmap() 2022-08-19 15:19:55 -07:00
signature.c
verify.c fsverity: Remove WQ_UNBOUND from fsverity read workqueue 2023-03-30 12:49:23 +02:00