linux/block, branch v2.6.21-rc2

[PATCH] lockdep: annotate BLKPG_DEL_PARTITION

2007-02-21T01:10:16Z

>============================================= >[ INFO: possible recursive locking detected ] >2.6.19-1.2909.fc7 #1 >--------------------------------------------- >anaconda/587 is trying to acquire lock: > (&bdev->bd_mutex){--..}, at: [] mutex_lock+0x21/0x24 > >but task is already holding lock: > (&bdev->bd_mutex){--..}, at: [] mutex_lock+0x21/0x24 > >other info that might help us debug this: >1 lock held by anaconda/587: > #0: (&bdev->bd_mutex){--..}, at: [] mutex_lock+0x21/0x24 > >stack backtrace: > [] show_trace_log_lvl+0x1a/0x2f > [] show_trace+0x12/0x14 > [] dump_stack+0x16/0x18 > [] __lock_acquire+0x116/0xa09 > [] lock_acquire+0x56/0x6f > [] __mutex_lock_slowpath+0xe5/0x24a > [] mutex_lock+0x21/0x24 > [] blkdev_ioctl+0x600/0x76d > [] block_ioctl+0x1b/0x1f > [] do_ioctl+0x22/0x68 > [] vfs_ioctl+0x252/0x265 > [] sys_ioctl+0x49/0x63 > [] syscall_call+0x7/0xb Annotate BLKPG_DEL_PARTITION's bd_mutex locking and add a little comment clarifying the bd_mutex locking, because I confused myself and initially thought the lock order was wrong too. Signed-off-by: Peter Zijlstra Cc: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] rework reserved major handling

2007-02-21T01:10:13Z

Several people have reported failures in dynamic major device number handling due to the recent changes in there to avoid handing out the local/experimental majors. Rolf reports that this is due to a gcc-4.1.0 bug. The patch refactors that code a lot in an attempt to provoke the compiler into behaving. Cc: Rolf Eike Beer Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

update I/O sched Kconfig help texts - CFQ is now default, not AS.

2007-02-17T19:08:22Z

Change I/O scheduler description to correctly show CFQ as being the default scheduler and not the anticipatory scheduler that previously was default. Signed-off-by: Jesper Juhl Signed-off-by: Adrian Bunk

[PATCH] mark struct file_operations const 3

2007-02-12T17:48:45Z

Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] register_blkdev(): don't hand out the LOCAL/EXPERIMENTAL majors

2007-02-12T17:48:27Z

As pointed out in http://bugzilla.kernel.org/show_bug.cgi?id=7922, dynamic blockdev major allocation can hand out majors which LANANA has defined as being for local/experimental use. Cc: Torben Mathiasen Cc: Greg KH Cc: Al Viro Cc: Tomas Klas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

cfq-iosched: improve continue or break logic in cfq_dispatch

2007-02-11T22:14:45Z

This improves performance considerably for sync requests when you have command queuing enabled. Signed-off-by: Jens Axboe

cfq-iosched: remove the implicit queue kicking in slice expire

2007-02-11T22:14:45Z

We only really need it for a process going away, so move it to those locations. Signed-off-by: Jens Axboe

cfq-iosched: check whether a queue timed out in accounting

2007-02-11T22:14:45Z

Makes it more fair for the residual slice count. Signed-off-by: Jens Axboe

cfq-iosched: tweak the FIFO checking

2007-02-11T22:14:45Z

We currently check the FIFO once per slice. Optimize that a bit and only do it as the first thing for a new slice, so we don't end up doing a single request and then seek to the FIFO requests. Signed-off-by: Jens Axboe

cfq-iosched: don't pass in queue for cfq_arm_slice_timer()

2007-02-11T22:14:45Z

It must always be the active queue, otherwise it's a bug. So just use the active_queue, don't pass it in explicitly. Signed-off-by: Jens Axboe