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  1. 19 2月, 2007 2 次提交
    • E
      9p: implement optional loose read cache · e03abc0c
      由 Eric Van Hensbergen 提交于 
      While cacheing is generally frowned upon in the 9p world, it has its
place -- particularly in situations where the remote file system is
exclusive and/or read-only.  The vacfs views of venti content addressable
store are a real-world instance of such a situation.  To facilitate higher
performance for these workloads (and eventually use the fscache patches),
we have enabled a "loose" cache mode which does not attempt to maintain
any form of consistency on the page-cache or dcache.  This results in over
two orders of magnitude performance improvement for cacheable block reads
in the Bonnie benchmark.  The more aggressive use of the dcache also seems
to improve metadata operational performance.
Signed-off-by: NEric Van Hensbergen <ericvh@gmail.com>
      e03abc0c
    • E
      9p: Use kthread_stop instead of sending a SIGKILL. · 2c0463a9
      由 Eric W. Biederman 提交于 
      Since the kthread api does not bump the reference count on
processes that tracked it is not safe allow user space to
kill the threads, as I still retain a pointer to the task_struct.
Signed-off-by: NEric W. Biederman <ebiederm@xmission.com>
Acked-by: NEric Van Hensbergen <ericvh@gmail.com>
      2c0463a9
  3. 13 2月, 2007 2 次提交
  5. 12 2月, 2007 1 次提交
  7. 10 2月, 2007 1 次提交
  9. 27 1月, 2007 4 次提交
  11. 09 12月, 2006 1 次提交
  13. 08 12月, 2006 1 次提交
  15. 04 12月, 2006 1 次提交
  17. 22 11月, 2006 1 次提交
  19. 01 10月, 2006 1 次提交
  21. 30 9月, 2006 1 次提交
  23. 27 9月, 2006 1 次提交
  25. 01 8月, 2006 2 次提交
  27. 01 7月, 2006 2 次提交
  29. 29 6月, 2006 3 次提交
  31. 27 6月, 2006 1 次提交
  33. 26 6月, 2006 2 次提交
  35. 23 6月, 2006 1 次提交
    • D
      [PATCH] VFS: Permit filesystem to override root dentry on mount · 454e2398
      由 David Howells 提交于 
      Extend the get_sb() filesystem operation to take an extra argument that
permits the VFS to pass in the target vfsmount that defines the mountpoint.

The filesystem is then required to manually set the superblock and root dentry
pointers.  For most filesystems, this should be done with simple_set_mnt()
which will set the superblock pointer and then set the root dentry to the
superblock's s_root (as per the old default behaviour).

The get_sb() op now returns an integer as there's now no need to return the
superblock pointer.

This patch permits a superblock to be implicitly shared amongst several mount
points, such as can be done with NFS to avoid potential inode aliasing.  In
such a case, simple_set_mnt() would not be called, and instead the mnt_root
and mnt_sb would be set directly.

The patch also makes the following changes:

 (*) the get_sb_*() convenience functions in the core kernel now take a vfsmount
     pointer argument and return an integer, so most filesystems have to change
     very little.

 (*) If one of the convenience function is not used, then get_sb() should
     normally call simple_set_mnt() to instantiate the vfsmount. This will
     always return 0, and so can be tail-called from get_sb().

 (*) generic_shutdown_super() now calls shrink_dcache_sb() to clean up the
     dcache upon superblock destruction rather than shrink_dcache_anon().

     This is required because the superblock may now have multiple trees that
     aren't actually bound to s_root, but that still need to be cleaned up. The
     currently called functions assume that the whole tree is rooted at s_root,
     and that anonymous dentries are not the roots of trees which results in
     dentries being left unculled.

     However, with the way NFS superblock sharing are currently set to be
     implemented, these assumptions are violated: the root of the filesystem is
     simply a dummy dentry and inode (the real inode for '/' may well be
     inaccessible), and all the vfsmounts are rooted on anonymous[*] dentries
     with child trees.

     [*] Anonymous until discovered from another tree.

 (*) The documentation has been adjusted, including the additional bit of
     changing ext2_* into foo_* in the documentation.

[akpm@osdl.org: convert ipath_fs, do other stuff]
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NAl Viro <viro@zeniv.linux.org.uk>
Cc: Nathan Scott <nathans@sgi.com>
Cc: Roland Dreier <rolandd@cisco.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      454e2398
  37. 09 6月, 2006 1 次提交
  39. 16 5月, 2006 2 次提交
  41. 11 4月, 2006 1 次提交
  43. 29 3月, 2006 1 次提交
  45. 26 3月, 2006 7 次提交