Mateusz Guzik 1fccb43c39 vfs: change si_usecount management to count used vnodes ... Currently si_usecount is effectively a sum of usecounts from all associated vnodes. This is maintained by special-casing for VCHR every time usecount is modified. Apart from complicating the code a little bit, it has a scalability impact since it forces a read from a cacheline shared with said count. There are no consumers of the feature in the ports tree. In head there are only 2: revoke and devfs_close. Both can get away with a weaker requirement than the exact usecount, namely just the count of active vnodes. Changing the meaning to the latter means we only need to modify it on 0<->1 transitions, avoiding the check plenty of times (and entirely in something like vrefact). Reviewed by: kib, jeff Tested by: pho Differential Revision: https://reviews.freebsd.org/D22202		2019-11-20 12:05:59 +00:00
..
autofs	Ensure that directory entry padding bytes are zeroed.	2018-11-23 22:24:59 +00:00
cd9660	cd9660: Remove redundant brelse() after r294954	2019-09-06 08:07:36 +00:00
cuse	Free all allocated unit IDs in cuse(3) after the client character	2019-06-25 11:46:01 +00:00
deadfs	Switch to use shared vnode locks for text files during image activation.	2019-05-05 11:20:43 +00:00
devfs	vfs: change si_usecount management to count used vnodes	2019-11-20 12:05:59 +00:00
ext2fs	ext2fs: Remove redundant brelse() after r294954	2019-09-06 08:07:12 +00:00
fdescfs	Ensure that directory entry padding bytes are zeroed.	2018-11-23 22:24:59 +00:00
fifofs	fcntl: fix overflow when setting F_READAHEAD	2019-06-20 23:07:20 +00:00
fuse	Fix an off-by-one error from r351961	2019-09-16 16:41:01 +00:00
msdosfs	Plug the rest of undef behavior places that were missed in r337456.	2019-10-11 18:37:02 +00:00
nfs	Fix interface between nfsclient and vnode pager.	2019-10-22 16:17:38 +00:00
nfsclient	Replace OBJ_MIGHTBEDIRTY with a system using atomics. Remove the TMPFS_DIRTY	2019-10-29 21:06:34 +00:00
nfsserver	Replace OBJ_MIGHTBEDIRTY with a system using atomics. Remove the TMPFS_DIRTY	2019-10-29 21:06:34 +00:00
nullfs	nullfs: use MNTK_NOMSYNC	2019-10-13 15:42:04 +00:00
procfs	Define macro VM_MAP_ENTRY_FOREACH for enumerating the entries in a vm_map.	2019-10-08 07:14:21 +00:00
pseudofs	pseudofs: hashed vncache	2019-10-22 22:52:53 +00:00
smbfs	(4/6) Protect page valid with the busy lock.	2019-10-15 03:45:41 +00:00
tmpfs	Simplify anonymous memory handling with an OBJ_ANON flag. This eliminates	2019-11-19 23:19:43 +00:00
udf	Rework v_object lifecycle for vnodes.	2019-08-29 07:50:25 +00:00
unionfs	vfs: add VOP_NEED_INACTIVE	2019-08-28 20:34:24 +00:00