提交 · ed2908f31398049c4371de9b100700e80704e95f · openanolis / cloud-kernel

08 12月, 2006 40 次提交

[PATCH] Remove superfluous lock_super() in extN xattr code · ed2908f3

由 Andreas Gruenbacher 提交于 12月 06, 2006

lock_super() is unnecessary for setting super-block feature flags.  Use the
provided *_SET_COMPAT_FEATURE() macros as well.
Signed-off-by: NAndreas Gruenbacher <agruen@suse.de>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

ed2908f3

[PATCH] cpuset: minor code refinements · 69604067

由 Paul Jackson 提交于 12月 06, 2006

A couple of minor code simplifications to the kernel/cpuset.c code.  No
functional change.  Just a little less code and a little more readable.
Signed-off-by: NPaul Jackson <pj@sgi.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

69604067

[PATCH] pull in necessary header files for cdev.h · 5ec68b2e

由 Jan Engelhardt 提交于 12月 06, 2006

linux/cdev.h uses struct kobject and other structs and should therefore
include them.  Currently, a module either needs to add the missing includes
itself, or, in case a module includes other headers already, needs to put
<linux/cdev.h> last, which goes against a alphabetically-sorted include
list.
Signed-off-by: NJan Engelhardt <jengelh@gmx.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

5ec68b2e

[PATCH] lockdep: fix ide/proc interaction · 9a2239b1

由 Peter Zijlstra 提交于 12月 06, 2006

  rmmod/3080 [HC0[0]:SC0[0]:HE0:SE1] is trying to acquire:
   (proc_subdir_lock){--..}, at: [<c04a33b0>] remove_proc_entry+0x40/0x191

  and this task is already holding:
   (ide_lock){++..}, at: [<c05651a2>] ide_unregister_subdriver+0x39/0xc8
  which would create a new lock dependency:
   (ide_lock){++..} -> (proc_subdir_lock){--..}

  but this new dependency connects a hard-irq-safe lock:
   (ide_lock){++..}
  ... which became hard-irq-safe at:
    [<c043c458>] lock_acquire+0x4b/0x6b
    [<c06129d7>] _spin_lock_irqsave+0x22/0x32
    [<c0567870>] ide_intr+0x17/0x1a9
    [<c044eb31>] handle_IRQ_event+0x20/0x4d
    [<c044ebf2>] __do_IRQ+0x94/0xef
    [<c0406771>] do_IRQ+0x9e/0xbd

  to a hard-irq-unsafe lock:
   (proc_subdir_lock){--..}
  ... which became hard-irq-unsafe at:
  ...  [<c043c458>] lock_acquire+0x4b/0x6b
    [<c06126ab>] _spin_lock+0x19/0x28
    [<c04a32f2>] xlate_proc_name+0x1b/0x99
    [<c04a3547>] proc_create+0x46/0xdf
    [<c04a3642>] create_proc_entry+0x62/0xa5
    [<c07c1972>] proc_misc_init+0x1c/0x1d2
    [<c07c1844>] proc_root_init+0x4c/0xe9
    [<c07ad703>] start_kernel+0x294/0x3b3

Move ide_remove_proc_entries() out from under ide_lock; there is nothing
that indicates that this is needed.

In specific, the call to ide_add_proc_entries() is unprotected, and there
is nothing else in the file using the respective ->proc fields. Also the
lock order around destroy_proc_ide_interface() suggests this.

Alan sayeth:

  proc_ide_write_settings walks the setting list under ide_setting_sem, read
  ditto.  remove_proc_entry is doing proc side housekeeping.

  Looks fine to me, although that old code is such a mess anything could be
  going on.
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

9a2239b1

[PATCH] via82cxxx: handle error condition properly · 23a1b2a7

由 Alan Cox 提交于 12月 06, 2006

Jeff noted that the via driver returned an error to an unsigned int in a
a case where errors are not permitted. Move the check down earlier so we
can handle it properly. Not as pretty but it works this way and avoids
hacking up ugly stuff in the legacy ide core.
Signed-off-by: NAlan Cox <alan@redhat.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

23a1b2a7

[PATCH] fix reiserfs bad path release panic · 87b4126f

由 Suzuki K P 提交于 12月 06, 2006

One of our test team hit a reiserfs_panic while running fsstress tests on
2.6.19-rc1.  The message looks like :

  REISERFS: panic(device Null superblock):
  reiserfs[5676]: assertion !(p->path_length != 1 ) failed at
  fs/reiserfs/stree.c:397:reiserfs_check_path: path not properly relsed.

The backtrace looked :

  kernel BUG in reiserfs_panic at fs/reiserfs/prints.c:361!
	.reiserfs_check_path+0x58/0x74
	.reiserfs_get_block+0x1444/0x1508
	.__block_prepare_write+0x1c8/0x558
	.block_prepare_write+0x34/0x64
	.reiserfs_prepare_write+0x118/0x1d0
	.generic_file_buffered_write+0x314/0x82c
	.__generic_file_aio_write_nolock+0x350/0x3e0
	.__generic_file_write_nolock+0x78/0xb0
	.generic_file_write+0x60/0xf0
	.reiserfs_file_write+0x198/0x2038
	.vfs_write+0xd0/0x1b4
	.sys_write+0x4c/0x8c
	syscall_exit+0x0/0x4

Upon debugging I found that the restart_transaction was not releasing
the path if the th->refcount was > 1.

/*static*/
int restart_transaction(struct reiserfs_transaction_handle *th,
                           			struct inode *inode, struct path *path)
{
	[...]

         /* we cannot restart while nested */
         if (th->t_refcount > 1) { <<- Path is not released in this case!
                 return 0;
         }

         pathrelse(path); <<- Path released here.
	[...]

This could happen in such a situation :

In reiserfs/inode.c: reiserfs_get_block() ::

      if (repeat == NO_DISK_SPACE || repeat == QUOTA_EXCEEDED) {
          /* restart the transaction to give the journal a chance to free
           ** some blocks.  releases the path, so we have to go back to
           ** research if we succeed on the second try
           */
          SB_JOURNAL(inode->i_sb)->j_next_async_flush = 1;

        -->>  retval = restart_transaction(th, inode, &path); <<--

  We are supposed to release the path, no matter we succeed or fail. But
if the th->refcount is > 1, the path is still valid. And,

          if (retval)
                   goto failure;
          repeat =
              _allocate_block(th, block, inode,
                             &allocated_block_nr, NULL, create);

If the above allocate_block fails with NO_DISK_SPACE or QUOTA_EXCEEDED,
we would have path which is not released.

         if (repeat != NO_DISK_SPACE && repeat != QUOTA_EXCEEDED) {
                   goto research;
         }
         if (repeat == QUOTA_EXCEEDED)
                   retval = -EDQUOT;
         else
                   retval = -ENOSPC;
         goto failure;
	[...]

       failure:
	[...]
         reiserfs_check_path(&path); << Panics here !

Attached here is a patch which could fix the issue.

fix reiserfs/inode.c : restart_transaction() to release the path in all
cases.

The restart_transaction() doesn't release the path when the the journal
handle has a refcount > 1.  This would trigger a reiserfs_panic() if we
encounter an -ENOSPC / -EDQUOT in reiserfs_get_block().
Signed-off-by: NSuzuki K P <suzuki@in.ibm.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
Cc: <reiserfs-dev@namesys.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Acked-by: NJan Kara <jack@suse.cz>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

87b4126f

[PATCH] Export pm_suspend for the shared APM emulation · 4cf30348

由 Ralf Baechle 提交于 12月 06, 2006

The new shared APM emulation just like its ARM and MIPS predecessors uses
pm_suspend() which was only exported on SH.  Move export to close to it's
definition where it really should be anyway.
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

4cf30348

[PATCH] io/storage: Documentation update to as-iosched.txt · 49033c81

由 Filipe 提交于 12月 06, 2006

Documentation update, adding references to CFQ scheduler and to another
document about selecting IO Schedulers.
Signed-off-by: NFilipe Lautert <filipe@icewall.org>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

49033c81

[PATCH] file: kill unnecessary timer in fdtable_defer · 593be07a

由 Tejun Heo 提交于 12月 06, 2006

free_fdtable_rc() schedules timer to reschedule fddef->wq if
schedule_work() on it returns 0.  However, schedule_work() guarantees that
the target work is executed at least once after the scheduling regardless
of its return value.  0 return simply means that the work was already
pending and thus no further action was required.

Another problem is that it used contant '5' as @expires argument to
mod_timer().

Kill unnecessary fddef->timer.
Signed-off-by: NTejun Heo <htejun@gmail.com>
Cc: Dipankar Sarma <dipankar@in.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

593be07a

[PATCH] SysRq-X: show blocked tasks · e59e2ae2

由 Ingo Molnar 提交于 12月 06, 2006

Add SysRq-X support: show blocked (TASK_UNINTERRUPTIBLE) tasks only.

Useful for debugging IO stalls.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

e59e2ae2

[PATCH] fuse: fix compile without CONFIG_BLOCK · 875d95ec

由 Miklos Szeredi 提交于 12月 06, 2006

Randy Dunlap wote:
> Should FUSE depend on BLOCK?  Without that and with BLOCK=n, I get:
>
> inode.c:(.text+0x3acc5): undefined reference to `sb_set_blocksize'
> inode.c:(.text+0x3a393): undefined reference to `get_sb_bdev'
> fs/built-in.o:(.data+0xd718): undefined reference to `kill_block_super

Most fuse filesystems work fine without block device support, so I
think a better solution is to disable the 'fuseblk' filesystem type if
BLOCK=n.
Signed-off-by: NMiklos Szeredi <miklos@szeredi.hu>
Acked-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

875d95ec

[PATCH] fuse: add DESTROY operation · 0ec7ca41

由 Miklos Szeredi 提交于 12月 06, 2006

Add a DESTROY operation for block device based filesystems.  With the help of
this operation, such a filesystem can flush dirty data to the device
synchronously before the umount returns.

This is needed in situations where the filesystem is assumed to be clean
immediately after unmount (e.g.  ejecting removable media).
Signed-off-by: NMiklos Szeredi <miklos@szeredi.hu>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

0ec7ca41

[PATCH] fuse: add bmap support · b2d2272f

由 Miklos Szeredi 提交于 12月 06, 2006

Add support for the BMAP operation for block device based filesystems.  This
is needed to support swap-files and lilo.
Signed-off-by: NMiklos Szeredi <miklos@szeredi.hu>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

b2d2272f

[PATCH] fuse: add blksize option · d8091614

由 Miklos Szeredi 提交于 12月 06, 2006

Add 'blksize' option for block device based filesystems.  During
initialization this is used to set the block size on the device and the super
block.  The default block size is 512bytes.
Signed-off-by: NMiklos Szeredi <miklos@szeredi.hu>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

d8091614

[PATCH] fuse: add support for block device based filesystems · d6392f87

由 Miklos Szeredi 提交于 12月 06, 2006

I never intended this, but people started using fuse to implement block device
based "real" filesystems (ntfs-3g, zfs).

The following four patches add better support for these kinds of filesystems.
Unlike "normal" fuse filesystems, using this feature should require superuser
privileges (enforced by the fusermount utility).

Thanks to Szabolcs Szakacsits for the input and testing.

This patch adds a 'fuseblk' filesystem type, which is only different from the
'fuse' filesystem type in how the 'dev_name' mount argument is interpreted.
Signed-off-by: NMiklos Szeredi <miklos@szeredi.hu>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

d6392f87

[PATCH] fuse: minor cleanup in fuse_dentry_revalidate · bdcf2508

由 Miklos Szeredi 提交于 12月 06, 2006

Remove unneeded code from fuse_dentry_revalidate().  This made some sense
while the validity time could wrap around, but now it's a very obvious no-op.
Signed-off-by: NMiklos Szeredi <miklos@szeredi.hu>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

bdcf2508

[PATCH] fuse: update userspace interface to version 7.8 · e9168c18

由 Miklos Szeredi 提交于 12月 06, 2006

Add a flag to the RELEASE message which specifies that a FLUSH operation
should be performed as well. This interface update is needed for the FreeBSD
port, and doesn't actually touch the Linux implementation at all.

Also rename the unused 'flush_flags' in the FLUSH message to 'unused'.
Signed-off-by: NMiklos Szeredi <miklos@szeredi.hu>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

e9168c18

[PATCH] constify inode accessors · 48ed214d

由 Jan Engelhardt 提交于 12月 06, 2006

Change the signature of i_size_read(), IMINOR() and IMAJOR() because they,
or the functions they call, will never modify the argument.
Signed-off-by: NJan Engelhardt <jengelh@gmx.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

48ed214d

[PATCH] SPI: improve sysfs compiler complaint handling · 89fc9a1a