Attilio Rao 83b3bdbc8a Improve VFS locking: ... - Implement real draining for vfs consumers by not relying on the mnt_lock and using instead a refcount in order to keep track of lock requesters. - Due to the change above, remove the mnt_lock lockmgr because it is now useless. - Due to the change above, vfs_busy() is no more linked to a lockmgr. Change so its KPI by removing the interlock argument and defining 2 new flags for it: MBF_NOWAIT which basically replaces the LK_NOWAIT of the old version (which was unlinked from the lockmgr alredy) and MBF_MNTLSTLOCK which provides the ability to drop the mountlist_mtx once the mnt interlock is held (ability still desired by most consumers). - The stub used into vfs_mount_destroy(), that allows to override the mnt_ref if running for more than 3 seconds, make it totally useless. Remove it as it was thought to work into older versions. If a problem of "refcount held never going away" should appear, we will need to fix properly instead than trust on such hackish solution. - Fix a bug where returning (with an error) from dounmount() was still leaving the MNTK_MWAIT flag on even if it the waiters were actually woken up. Just a place in vfs_mount_destroy() is left because it is going to recycle the structure in any case, so it doesn't matter. - Remove the markercnt refcount as it is useless. This patch modifies VFS ABI and breaks KPI for vfs_busy() so manpages and __FreeBSD_version will be modified accordingly. Discussed with: kib Tested by: pho		2008-11-02 10:15:42 +00:00
..
bde
cache
concat	Add sbuf_new_auto as a shortcut for the very common case of creating a	2008-08-09 11:14:05 +00:00
eli	Style(9).	2008-08-12 20:19:08 +00:00
gate
journal	Improve VFS locking:	2008-11-02 10:15:42 +00:00
label
linux_lvm	Add a geom class to map Linux LVM logical volumes.	2008-02-20 07:45:36 +00:00
mirror
multipath
nop
part	Add support for reading Tivo Series 1 partitioning. This likely needs	2008-11-02 03:02:56 +00:00
raid3
shsec
stripe	Add sbuf_new_auto as a shortcut for the very common case of creating a	2008-08-09 11:14:05 +00:00
uzip
vinum	- Import macros used in gmirror for printing gvinum debug messages and making	2008-10-26 17:20:37 +00:00
virstor	Avoid NULL deference.	2008-06-30 15:21:42 +00:00
zero
geom_aes.c
geom_bsd_enc.c
geom_bsd.c
geom_ccd.c	Add sbuf_new_auto as a shortcut for the very common case of creating a	2008-08-09 11:14:05 +00:00
geom_ctl.c	Add sbuf_new_auto as a shortcut for the very common case of creating a	2008-08-09 11:14:05 +00:00
geom_ctl.h
geom_dev.c	Remove unit2minor() use from kernel code.	2008-09-26 14:19:52 +00:00
geom_disk.c	Revert r184136. Instead, push the check for crashdumpmap overflow into the	2008-10-31 10:11:35 +00:00
geom_disk.h
geom_dump.c
geom_event.c
geom_fox.c
geom_int.h
geom_io.c	Just a fixup for a KTRACE message I stumbled upon many moons ago.	2008-09-18 15:02:19 +00:00
geom_kern.c	Add sbuf_new_auto as a shortcut for the very common case of creating a	2008-08-09 11:14:05 +00:00
geom_mbr_enc.c
geom_mbr.c
geom_pc98_enc.c
geom_pc98.c
geom_slice.c	Add sbuf_new_auto as a shortcut for the very common case of creating a	2008-08-09 11:14:05 +00:00
geom_slice.h
geom_subr.c	Add sbuf_new_auto as a shortcut for the very common case of creating a	2008-08-09 11:14:05 +00:00
geom_sunlabel_enc.c
geom_sunlabel.c
geom_vfs.c	Remove the struct thread unuseful argument from bufobj interface.	2008-10-10 21:23:50 +00:00
geom_vfs.h	Remove the struct thread unuseful argument from bufobj interface.	2008-10-10 21:23:50 +00:00
geom_vol_ffs.c
geom.h	Add g_retaste(), which given a class will present all non-open providers	2008-03-23 01:23:35 +00:00
notes