linux/drivers/md/bitmap.c, branch v3.10-rc4

md: use set_bit_le and clear_bit_le

2013-04-24T01:42:41Z

The value returned by test_and_set_bit_le() drivers/md/bitmap.c is not used. So just use set_bit_le(). The same goes for test_and_clear_bit_le(). Signed-off-by: Akinobu Mita Cc: Neil Brown Cc: linux-raid@vger.kernel.org Signed-off-by: NeilBrown

new helper: file_inode(file)

2013-02-23T04:31:31Z

Signed-off-by: Al Viro

md/bitmap:Don't use IS_ERR to judge alloc_page().

2012-10-11T02:45:36Z

Signed-off-by: Jianpeng Ma Signed-off-by: NeilBrown

raid: replace list_for_each_continue_rcu with new interface

2012-10-11T02:43:21Z

This patch replaces list_for_each_continue_rcu() with list_for_each_entry_continue_rcu() to save a few lines of code and allow removing list_for_each_continue_rcu(). Reviewed-by: Paul E. McKenney Signed-off-by: Michael Wang Signed-off-by: NeilBrown

md/raid1: submit IO from originating thread instead of md thread.

2012-08-01T22:33:20Z

queuing writes to the md thread means that all requests go through the one processor which may not be able to keep up with very high request rates. So use the plugging infrastructure to submit all requests on unplug. If a 'schedule' is needed, we fall back on the old approach of handing the requests to the thread for it to handle. Signed-off-by: NeilBrown

md/bitmap: record the space available for the bitmap in the superblock.

2012-05-22T03:55:34Z

Now that bitmaps can grow and shrink it is best if we record how much space is available. This means that when we reduce the size of the bitmap we won't "lose" the space for late when we might want to increase the size of the bitmap again. Signed-off-by: NeilBrown

md/bitmap: make sure reshape request are reflected in superblock.

2012-05-22T03:55:26Z

As a reshape may change the sync_size and/or chunk_size, we need to update these whenever we write out the bitmap superblock. Signed-off-by: NeilBrown

md/bitmap: add bitmap_resize function to allow bitmap resizing.

2012-05-22T03:55:25Z

This function will allocate the new data structures and copy bits across from old to new, allowing for the possibility that the chunksize has changed. Use the same function for performing the initial allocation of the structures. This improves test coverage. When bitmap_resize is used to resize an existing bitmap, it only copies '1' bits in, not '0' bits. So when allocating the bitmap, ensure everything is initialised to ZERO. Signed-off-by: NeilBrown

md/bitmap: use DIV_ROUND_UP instead of open-code

2012-05-22T03:55:25Z

Also take the opportunity to simplify CHUNK_BLOCK_RATIO. Signed-off-by: NeilBrown

md/bitmap: create a 'struct bitmap_counts' substructure of 'struct bitmap'

2012-05-22T03:55:24Z

The new "struct bitmap_counts" contains all the fields that are related to counting the number of active writes in each bitmap chunk. Having this separate will make it easier to change the chunksize or overall size of a bitmap atomically. Signed-off-by: NeilBrown