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fs: small rcu-walk documentation fixes 

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
This commit is contained in:
Nick Piggin 2011-01-14 02:26:53 +00:00 committed by Nick Piggin
parent b3e19d924b
commit a82416da83
2 changed files with 6 additions and 6 deletions
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8
Documentation/filesystems/porting
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@ -365,8 +365,8 @@ must be done in the RCU callback.
[recommended]
vfs now tries to do path walking in "rcu-walk mode", which avoids
atomic operations and scalability hazards on dentries and inodes (see
Documentation/filesystems/path-walk.txt). d_hash and d_compare changes (above)
are examples of the changes required to support this. For more complex
Documentation/filesystems/path-lookup.txt). d_hash and d_compare changes
(above) are examples of the changes required to support this. For more complex
filesystem callbacks, the vfs drops out of rcu-walk mode before the fs call, so
no changes are required to the filesystem. However, this is costly and loses
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.
permission and check_acl are inode permission checks that are called
on many or all directory inodes on the way down a path walk (to check for
exec permission). These must now be rcu-walk aware (flags & IPERM_RCU). See
Documentation/filesystems/vfs.txt for more details.
exec permission). These must now be rcu-walk aware (flags & IPERM_FLAG_RCU).
See Documentation/filesystems/vfs.txt for more details.

4
Documentation/filesystems/vfs.txt
View File

@ -415,8 +415,8 @@ otherwise noted.
permission: called by the VFS to check for access rights on a POSIX-like
filesystem.
May be called in rcu-walk mode (flags & IPERM_RCU). If in rcu-walk
mode, the filesystem must check the permission without blocking or
May be called in rcu-walk mode (flags & IPERM_FLAG_RCU). If in rcu-walk
mode, the filesystem must check the permission without blocking or
storing to the inode.
If a situation is encountered that rcu-walk cannot handle, return