diff options
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/Locking | 8 | ||||
| -rw-r--r-- | Documentation/filesystems/proc.txt | 10 |
2 files changed, 6 insertions, 12 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking index a934baeeb33..1045da582b9 100644 --- a/Documentation/filesystems/Locking +++ b/Documentation/filesystems/Locking @@ -219,8 +219,12 @@ This may also be done to avoid internal deadlocks, but rarely. If the filesytem is called for sync then it must wait on any in-progress I/O and then start new I/O. -The filesystem should unlock the page synchronously, before returning -to the caller. +The filesystem should unlock the page synchronously, before returning to the +caller, unless ->writepage() returns special WRITEPAGE_ACTIVATE +value. WRITEPAGE_ACTIVATE means that page cannot really be written out +currently, and VM should stop calling ->writepage() on this page for some +time. VM does this by moving page to the head of the active list, hence the +name. Unless the filesystem is going to redirty_page_for_writepage(), unlock the page and return zero, writepage *must* run set_page_writeback() against the page, diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt index cbe85c17176..6c98f2bd421 100644 --- a/Documentation/filesystems/proc.txt +++ b/Documentation/filesystems/proc.txt @@ -909,16 +909,6 @@ nr_free_inodes Represents the number of free inodes. Ie. The number of inuse inodes is (nr_inodes - nr_free_inodes). -super-nr and super-max ----------------------- - -Again, super block structures are allocated by the kernel, but not freed. The -file super-max contains the maximum number of super block handlers, where -super-nr shows the number of currently allocated ones. - -Every mounted file system needs a super block, so if you plan to mount lots of -file systems, you may want to increase these numbers. - aio-nr and aio-max-nr --------------------- |