diff options
author | Nick Piggin <npiggin@kernel.dk> | 2011-01-13 21:26:53 -0500 |
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committer | Nick Piggin <npiggin@hera.kernel.org> | 2011-01-13 21:26:53 -0500 |
commit | a82416da83722944d78d933301e32e7c5ad70edd (patch) | |
tree | c2990d561fc5ed703bf46b34122f7a6b81b45dd5 /Documentation | |
parent | b3e19d924b6eaf2ca7d22cba99a517c5171007b6 (diff) |
fs: small rcu-walk documentation fixes
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/filesystems/porting | 8 | ||||
-rw-r--r-- | Documentation/filesystems/vfs.txt | 4 |
2 files changed, 6 insertions, 6 deletions
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting index 07a32b42cf9c..7fcac6393cd0 100644 --- a/Documentation/filesystems/porting +++ b/Documentation/filesystems/porting | |||
@@ -365,8 +365,8 @@ must be done in the RCU callback. | |||
365 | [recommended] | 365 | [recommended] |
366 | vfs now tries to do path walking in "rcu-walk mode", which avoids | 366 | vfs now tries to do path walking in "rcu-walk mode", which avoids |
367 | atomic operations and scalability hazards on dentries and inodes (see | 367 | atomic operations and scalability hazards on dentries and inodes (see |
368 | Documentation/filesystems/path-walk.txt). d_hash and d_compare changes (above) | 368 | Documentation/filesystems/path-lookup.txt). d_hash and d_compare changes |
369 | are examples of the changes required to support this. For more complex | 369 | (above) are examples of the changes required to support this. For more complex |
370 | filesystem callbacks, the vfs drops out of rcu-walk mode before the fs call, so | 370 | filesystem callbacks, the vfs drops out of rcu-walk mode before the fs call, so |
371 | no changes are required to the filesystem. However, this is costly and loses | 371 | no changes are required to the filesystem. However, this is costly and loses |
372 | the benefits of rcu-walk mode. We will begin to add filesystem callbacks that | 372 | the benefits of rcu-walk mode. We will begin to add filesystem callbacks that |
@@ -383,5 +383,5 @@ Documentation/filesystems/vfs.txt for more details. | |||
383 | 383 | ||
384 | permission and check_acl are inode permission checks that are called | 384 | permission and check_acl are inode permission checks that are called |
385 | on many or all directory inodes on the way down a path walk (to check for | 385 | on many or all directory inodes on the way down a path walk (to check for |
386 | exec permission). These must now be rcu-walk aware (flags & IPERM_RCU). See | 386 | exec permission). These must now be rcu-walk aware (flags & IPERM_FLAG_RCU). |
387 | Documentation/filesystems/vfs.txt for more details. | 387 | See Documentation/filesystems/vfs.txt for more details. |
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt index fbb324e2bd43..cae6d27c9f5b 100644 --- a/Documentation/filesystems/vfs.txt +++ b/Documentation/filesystems/vfs.txt | |||
@@ -415,8 +415,8 @@ otherwise noted. | |||
415 | permission: called by the VFS to check for access rights on a POSIX-like | 415 | permission: called by the VFS to check for access rights on a POSIX-like |
416 | filesystem. | 416 | filesystem. |
417 | 417 | ||
418 | May be called in rcu-walk mode (flags & IPERM_RCU). If in rcu-walk | 418 | May be called in rcu-walk mode (flags & IPERM_FLAG_RCU). If in rcu-walk |
419 | mode, the filesystem must check the permission without blocking or | 419 | mode, the filesystem must check the permission without blocking or |
420 | storing to the inode. | 420 | storing to the inode. |
421 | 421 | ||
422 | If a situation is encountered that rcu-walk cannot handle, return | 422 | If a situation is encountered that rcu-walk cannot handle, return |