TxAnchor.anon_list is protected by jfsTxnLock (TXN_LOCK), but there was
a place in txLock() that was removing an entry from the list without holding
the spinlock.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Some error paths may iput an invalid inode with i_nlink=0. jfs should
not try to actually delete such an inode.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Under heavy load, hot metadata pages are often locked by non-committed
transactions, making them difficult to flush to disk. This prevents
the sync point from advancing past a transaction that had modified the
page.
There is a point during the sync barrier processing where all
outstanding transactions have been committed to disk, but no new
transaction have been allowed to proceed. This is the best time
to write the metadata.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
A failure in dbAlloc caused a directory's i_blocks to be incorrectly
incremented, causing jfs_fsck to find the inode to be corrupt.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
If a metadata page is kept active, it is possible that the sync barrier logic
continues to trigger, even if all active transactions have been phyically
written to the journal. This can cause a hang, since the completion of the
journal I/O is what unsets the sync barrier flag to allow new transactions
to be created.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
This is half of a patch that Qu Fuping submitted in April. The first part
was applied to fs/mpage.c in 2.6.12-rc4.
jfs_fsync should return error, but it doesn't wait for the metadata page to
be uptodate, e.g.:
jfs_fsync->jfs_commit_inode->txCommit->diWrite->read_metapage->
__get_metapage->read_cache_page reads a page from disk. Because read is
async, when read_cache_page: err = filler(data, page), filler will not
return error, it just submits I/O request and returns. So, page is not
uptodate. Checking only if(IS_ERROR(mp->page)) is not enough, we should
add "|| !PageUptodate(mp->page)"
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
All of the different xattr namespaces have different rules.
user.* and ACL's are not allowed on symlinks, and since these were the
first xattrs implemented, I assumed there was no need to support xattrs
on symlinks. This one-line patch should fix it.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
I'm finally getting around to cleaning out debug code that I've never used.
There has always been code ifdef'ed out by _JFS_DEBUG_DMAP, _JFS_DEBUG_IMAP,
_JFS_DEBUG_DTREE, and _JFS_DEBUG_XTREE, which I have personally never used,
and I doubt that anyone has since the design stage back in OS/2. There is
also a function, xtGather, that has never been used, and I don't know why it
was ever there.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
1. Establish a simple API for process freezing defined in linux/include/sched.h:
frozen(process) Check for frozen process
freezing(process) Check if a process is being frozen
freeze(process) Tell a process to freeze (go to refrigerator)
thaw_process(process) Restart process
frozen_process(process) Process is frozen now
2. Remove all references to PF_FREEZE and PF_FROZEN from all
kernel sources except sched.h
3. Fix numerous locations where try_to_freeze is manually done by a driver
4. Remove the argument that is no longer necessary from two function calls.
5. Some whitespace cleanup
6. Clear potential race in refrigerator (provides an open window of PF_FREEZE
cleared before setting PF_FROZEN, recalc_sigpending does not check
PF_FROZEN).
This patch does not address the problem of freeze_processes() violating the rule
that a task may only modify its own flags by setting PF_FREEZE. This is not clean
in an SMP environment. freeze(process) is therefore not SMP safe!
Signed-off-by: Christoph Lameter <christoph@lameter.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Basically, we saw a large amount of time spent in the
jfs_strfromUCS_le() function, mispredicting the branch inside the
loop, so I just added some unlikely modifiers to the if statements to
re-ordered the code. Again, these simple changes provided > 2 % on
spec-sfs, so please consider it for inclusion.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
This file duplicates <linux/posix_acl_xattr.h>, using slightly different
names.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
fs/jfs/jfs_logmgr.c: In function `jfs_flush_journal':
fs/jfs/jfs_logmgr.c:1632: warning: unused variable `mp'
Some debug code in jfs_flush_journal does nothing when CONFIG_JFS_DEBUG
is not defined. Place the whole code segment within an ifdef to avoid
unnecessary code to be compiled and the warning to be issued.
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
add_missing_indices() must set tlck->type to tlckBTROOT when modifying
a root btree root to avoid a trap in txRelease()
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
kfree() can handle a NULL pointer, don't worry about passing it one.
Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Dave Kleikamp
Linus Torvalds
Al Viro
Qu Fuping
Ian Dall
Christoph Lameter
Sonny Rao
Christoph Hellwig
Jesper Juhl