linux/drivers/md/raid10.c, branch v2.6.25-rc2

md: change ITERATE_RDEV to rdev_for_each

2008-02-06T18:41:19Z

As this is more in line with common practice in the kernel. Also swap the args around to be more like list_for_each. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

md: allow a maximum extent to be set for resyncing

2008-02-06T18:41:18Z

This allows userspace to control resync/reshape progress and synchronise it with other activities, such as shared access in a SAN, or backing up critical sections during a tricky reshape. Writing a number of sectors (which must be a multiple of the chunk size if such is meaningful) causes a resync to pause when it gets to that point. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

md: Update md bitmap during resync.

2008-02-06T18:41:18Z

Currently an md array with a write-intent bitmap does not updated that bitmap to reflect successful partial resync. Rather the entire bitmap is updated when the resync completes. This is because there is no guarentee that resync requests will complete in order, and tracking each request individually is unnecessarily burdensome. However there is value in regularly updating the bitmap, so add code to periodically pause while all pending sync requests complete, then update the bitmap. Doing this only every few seconds (the same as the bitmap update time) does not notciably affect resync performance. [snitzer@gmail.com: export bitmap_cond_end_sync] Signed-off-by: Neil Brown Cc: "Mike Snitzer" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Add UNPLUG traces to all appropriate places

2007-11-09T12:41:32Z

Added blk_unplug interface, allowing all invocations of unplugs to result in a generated blktrace UNPLUG. Signed-off-by: Alan D. Brunelle Signed-off-by: Jens Axboe

block: convert blkdev_issue_flush() to use empty barriers

2007-10-16T09:05:02Z

Then we can get rid of ->issue_flush_fn() and all the driver private implementations of that. Signed-off-by: Jens Axboe

Drop 'size' argument from bio_endio and bi_end_io

2007-10-10T07:25:57Z

As bi_end_io is only called once when the reqeust is complete, the 'size' argument is now redundant. Remove it. Now there is no need for bio_endio to subtract the size completed from bi_size. So don't do that either. While we are at it, change bi_end_io to return void. Signed-off-by: Neil Brown Signed-off-by: Jens Axboe

md: handle writes to broken raid10 arrays gracefully

2007-07-31T22:39:38Z

When writing to a broken array, raid10 currently happily emits empty bio lists. IOW, the master bio will never be completed, sending writers to UNINTERRUPTIBLE_SLEEP forever. Signed-off-by: Arne Redlich Acked-by: Neil Brown Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

md: raid10: fix use-after-free of bio

2007-07-31T22:39:38Z

In case of read errors raid10d tries to print a nice error message, unfortunately using data from an already put bio. Signed-off-by: Maik Hampel Acked-By: NeilBrown Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[BLOCK] Get rid of request_queue_t typedef

2007-07-24T07:28:11Z

Some of the code has been gradually transitioned to using the proper struct request_queue, but there's lots left. So do a full sweet of the kernel and get rid of this typedef and replace its uses with the proper type. Signed-off-by: Jens Axboe

md: change bitmap_unplug and others to void functions

2007-07-17T17:23:15Z

bitmap_unplug only ever returns 0, so it may as well be void. Two callers try to print a message if it returns non-zero, but that message is already printed by bitmap_file_kick. write_page returns an error which is not consistently checked. It always causes BITMAP_WRITE_ERROR to be set on an error, and that can more conveniently be checked. When the return of write_page is checked, an error causes bitmap_file_kick to be called - so move that call into write_page - and protect against recursive calls into bitmap_file_kick. bitmap_update_sb returns an error that is never checked. So make these 'void' and be consistent about checking the bit. Signed-off-by: Neil Brown Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds