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7a5be5a9ff
NetBSD/sys/ufs
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hannken 7a5be5a9ff - Add flag L_COWINPROGRESS to struct lwp to avoid recursion when 
doing copy-on-write.

- Change VFS_SNAPSHOT() to return the snapshot vnode locked.

- Make the IO path for copy-on-write and snapshot-read more lightweight.
  Avoids deadlocks where vn_rdwr(...READ...) has a shared lock and needs
  to copy-on-write.
  Avoids deadlocks/panics where to clean pages the copy-on-write needs
  to allocate pages for its VOP_PUTPAGES().

L_COWINPROGRESS part approved by: Jason R. Thorpe <thorpej@netbsd.org>
2004-06-20 18:55:58 +00:00
..
ext2fs Add ffs internal snapshots. Written by Marshall Kirk McKusick for FreeBSD. 2004-05-25 14:54:55 +00:00
ffs - Add flag L_COWINPROGRESS to struct lwp to avoid recursion when 2004-06-20 18:55:58 +00:00
lfs lfs_gop_write: assert that ifile never come here. 2004-05-30 20:45:44 +00:00
mfs Add ffs internal snapshots. Written by Marshall Kirk McKusick for FreeBSD. 2004-05-25 14:54:55 +00:00
ufs Use a pool for struct direct instead of kernel stack. 2004-06-20 18:25:49 +00:00
files.ufs Add ffs internal snapshots. Written by Marshall Kirk McKusick for FreeBSD. 2004-05-25 14:54:55 +00:00
Makefile