Thanks,
- Joe
http://people.sistina.com/~thornber/patches/2.5-stable/2.5.51/2.5.51-dm-3.tar.bz2
Changes
-------
Revision 1:
Four constants:
DM_DIR,
DM_MAX_TYPE_NAME,
DM_NAME_LEN,
DM_UUID_LEN
Were being declared in device-mapper.h, these are all specific to
the ioctl interface, so they've been moved to dm-ioctl.h. Nobody
in userland should ever include <linux/device-mapper.h> so remove
ifdef __KERNEL guards.
Revision 2:
An error value was not being checked correctly in open_dev().
[Kevin Corry]
Revision 3:
Return -ENOTBLK if lookup_device() finds the inode, but it
is not a block device. [Cristoph Hellwig]
Revision 4:
No need to validate the parameters if we are doing a
REMOVE_ALL command.
Revision 5:
check_device_area was comparing the bytes with sectors.
[Stefan Lauterbach]
Revision 6:
minor change for dm-strip.c. Tests for correct chunksize before it allocates
the stripe context. [Heinz Mauelshagen]
Revision 7:
There's a bug in the dm-stripe.c constructor failing top check if enough
destinations are handed in. [Heinz Mauelshagen]
Revision 8:
Give each device its own io mempool to avoid a potential
deadlock with stacked devices. [HM + EJT]
Revision 9:
queue_io() was checking the DMF_SUSPENDED flag rather than the new
DMF_BLOCK_IO flag. This meant suspend could deadlock under load.
Revision 10:
dm_suspend(): Stop holding the read lock around the while loop that
waits for pending io to complete.
Revision 11:
Add a blk_run_queues() call to encourage pending io to flush
when we're doing a dm_suspend().
Revision 12:
dec_pending(): only bother spin locking if io->error is going to be
updated. [Kevin Corry]
Revision 13:
md->pending was being incremented for each clone rather than just
once. [Kevin Corry]
Revision 14:
Some fields in the duplicated bio weren't being set up properly in
__split_page(). [Kevin Corry]
Revision 15:
Remove some paranoia in highmem.c, need to check this with Jens Axboe.
Revision 16:
Remove verbose debug message 'Splitting page'.
Revision 17:
o If there's an error you still need to call bio_endio with bio->bi_size
as the 'done' param.
o Simplify clone_endio.
[Kevin Corry]
Revision 18:
The block layer does not honour bio->bi_size when issuing io, instead
it performs io to the complete bvecs. This means we have to change
the bio splitting code slightly.
Given a bio we repeatedly apply one of the following three operations
until there is no more io left in the bio:
1) The remaining io does not cross an io/target boundary, so just
create a clone and issue all of the io.
2) There are some bvecs at the start of the bio that are not split by
a target boundary. Create a clone for these bvecs only.
3) The first bvec needs splitting, use bio_alloc() to create *two*
bios, one for the first half of the bvec, the other for the second
half. A bvec can never contain more than one boundary.
Revision 19:
For large bios it was possible to look up the wrong target. Bug
introduced by the recent splitting changes.
Revision 20:
The linear target was getting the start sector wrong when doing a
dm_get_device(). [Kevin Corry]
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