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authorIngo Molnar <mingo@elte.hu>2008-09-14 17:26:53 +0200
committerIngo Molnar <mingo@elte.hu>2008-09-14 17:26:53 +0200
commitf81b691a3df09806385ea413c3a2ee094c705ca3 (patch)
tree01c0d6d319fcbddc98171d06cfe8e742cd270455 /Documentation/filesystems
parent110e0358e7dfd9cc56d47077068f3680dae10b56 (diff)
parentadee14b2e1557d0a8559f29681732d05a89dfc35 (diff)
Merge commit 'v2.6.27-rc6' into x86/pat
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r--Documentation/filesystems/Locking15
-rw-r--r--Documentation/filesystems/ext4.txt6
-rw-r--r--Documentation/filesystems/ntfs.txt4
-rw-r--r--Documentation/filesystems/proc.txt19
4 files changed, 31 insertions, 13 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking
index 680fb566b92..8362860e21a 100644
--- a/Documentation/filesystems/Locking
+++ b/Documentation/filesystems/Locking
@@ -144,8 +144,8 @@ prototypes:
void (*kill_sb) (struct super_block *);
locking rules:
may block BKL
-get_sb yes yes
-kill_sb yes yes
+get_sb yes no
+kill_sb yes no
->get_sb() returns error or 0 with locked superblock attached to the vfsmount
(exclusive on ->s_umount).
@@ -409,12 +409,12 @@ ioctl: yes (see below)
unlocked_ioctl: no (see below)
compat_ioctl: no
mmap: no
-open: maybe (see below)
+open: no
flush: no
release: no
fsync: no (see below)
aio_fsync: no
-fasync: yes (see below)
+fasync: no
lock: yes
readv: no
writev: no
@@ -431,13 +431,6 @@ For many filesystems, it is probably safe to acquire the inode
semaphore. Note some filesystems (i.e. remote ones) provide no
protection for i_size so you will need to use the BKL.
-->open() locking is in-transit: big lock partially moved into the methods.
-The only exception is ->open() in the instances of file_operations that never
-end up in ->i_fop/->proc_fops, i.e. ones that belong to character devices
-(chrdev_open() takes lock before replacing ->f_op and calling the secondary
-method. As soon as we fix the handling of module reference counters all
-instances of ->open() will be called without the BKL.
-
Note: ext2_release() was *the* source of contention on fs-intensive
loads and dropping BKL on ->release() helps to get rid of that (we still
grab BKL for cases when we close a file that had been opened r/w, but that
diff --git a/Documentation/filesystems/ext4.txt b/Documentation/filesystems/ext4.txt
index 80e193d82e2..0d5394920a3 100644
--- a/Documentation/filesystems/ext4.txt
+++ b/Documentation/filesystems/ext4.txt
@@ -26,6 +26,12 @@ Mailing list: linux-ext4@vger.kernel.org
git://git.kernel.org/pub/scm/fs/ext2/e2fsprogs.git
+ - Note that it is highly important to install the mke2fs.conf file
+ that comes with the e2fsprogs 1.41.x sources in /etc/mke2fs.conf. If
+ you have edited the /etc/mke2fs.conf file installed on your system,
+ you will need to merge your changes with the version from e2fsprogs
+ 1.41.x.
+
- Create a new filesystem using the ext4dev filesystem type:
# mke2fs -t ext4dev /dev/hda1
diff --git a/Documentation/filesystems/ntfs.txt b/Documentation/filesystems/ntfs.txt
index e79ee2db183..ac2a261c5f7 100644
--- a/Documentation/filesystems/ntfs.txt
+++ b/Documentation/filesystems/ntfs.txt
@@ -40,7 +40,7 @@ Web site
========
There is plenty of additional information on the linux-ntfs web site
-at http://linux-ntfs.sourceforge.net/
+at http://www.linux-ntfs.org/
The web site has a lot of additional information, such as a comprehensive
FAQ, documentation on the NTFS on-disk format, information on the Linux-NTFS
@@ -272,7 +272,7 @@ And you would know that /dev/hda2 has a size of 37768814 - 4209030 + 1 =
For Win2k and later dynamic disks, you can for example use the ldminfo utility
which is part of the Linux LDM tools (the latest version at the time of
writing is linux-ldm-0.0.8.tar.bz2). You can download it from:
- http://linux-ntfs.sourceforge.net/downloads.html
+ http://www.linux-ntfs.org/
Simply extract the downloaded archive (tar xvjf linux-ldm-0.0.8.tar.bz2), go
into it (cd linux-ldm-0.0.8) and change to the test directory (cd test). You
will find the precompiled (i386) ldminfo utility there. NOTE: You will not be
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 64557821ee5..394eb2cc1c3 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -1339,6 +1339,25 @@ Enables/Disables the protection of the per-process proc entries "maps" and
"smaps". When enabled, the contents of these files are visible only to
readers that are allowed to ptrace() the given process.
+msgmni
+------
+
+Maximum number of message queue ids on the system.
+This value scales to the amount of lowmem. It is automatically recomputed
+upon memory add/remove or ipc namespace creation/removal.
+When a value is written into this file, msgmni's value becomes fixed, i.e. it
+is not recomputed anymore when one of the above events occurs.
+Use auto_msgmni to change this behavior.
+
+auto_msgmni
+-----------
+
+Enables/Disables automatic recomputing of msgmni upon memory add/remove or
+upon ipc namespace creation/removal (see the msgmni description above).
+Echoing "1" into this file enables msgmni automatic recomputing.
+Echoing "0" turns it off.
+auto_msgmni default value is 1.
+
2.4 /proc/sys/vm - The virtual memory subsystem
-----------------------------------------------