CVS commit: src/sys/kern

["Juergen Hannken-Illjes" <hannken%netbsd.org@localhost>]

Module Name:    src
Committed By:   hannken
Date:           Fri Aug 26 11:03:53 UTC 2022

Modified Files:
        src/sys/kern: vfs_mount.c

Log Message:
Two defects in vfs_getnewfsid():

- Parallel mounts may get the same fsid.  Always increment "xxxfs_mntid"
  to make it unlikely.

- Directly walk "mountlist" to prevent a rare deadlock where one thread
  holds a vnode locked, calls vfs_getnewfsid() and the iterator has to
  wait for a suspended file system while the thread suspending needs
  this vnode lock.


To generate a diff of this commit:
cvs rdiff -u -r1.95 -r1.96 src/sys/kern/vfs_mount.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.