kib 479eaba412 Remove some unneeded vfs_busy() calls in SU code. ... When softdep_fsync() is running, a caller must already started write for the mount point. Since unmount or remount to ro suspends mount point, it cannot run in parallel with softdep_fsync(), which makes vfs_busy() call there not needed. Doing blocking vfs_busy() there effectively causes lock order reversal between vn_start_write() and setting MNTK_UNMOUNT, because vfs_busy(mp, 0) sleeps waiting for MNTK_UNMOUNT becoming clear, while unmount sets the flag and starts the suspension. Note that all other uses of vfs_busy() in SU code are non-blocking. Reported by: chs by mckusick Reviewed by: mckusick Tested by: pho Sponsored by: The FreeBSD Foundation MFC after: 1 week		2019-09-09 11:22:38 +00:00
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ffs	Remove some unneeded vfs_busy() calls in SU code.	2019-09-09 11:22:38 +00:00
ufs	Properly check for writers when fetching quotas for writeable vnodes	2019-09-07 15:57:23 +00:00