linux.git/block/fops.c, branch v5.16-rc2

Merge tag 'for-5.16/bdev-size-2021-11-09' of git://git.kernel.dk/linux-block

2021-11-09T19:16:20+00:00

Pull more bdev size updates from Jens Axboe:
 "Two followup changes for the bdev-size series from this merge window:

   - Add loff_t cast to bdev_nr_bytes() (Christoph)

   - Use bdev_nr_bytes() consistently for the block parts at least (me)"

* tag 'for-5.16/bdev-size-2021-11-09' of git://git.kernel.dk/linux-block:
  block: use new bdev_nr_bytes() helper for blkdev_{read,write}_iter()
  block: add a loff_t cast to bdev_nr_bytes

block: use new bdev_nr_bytes() helper for blkdev_{read,write}_iter()

2021-11-05T14:32:05+00:00

We have new helpers for this, use them rather than the slower inode
size reads. This makes the read/write path consistent with most of
the rest of block as well.

Signed-off-by: Jens Axboe 
Reviewed-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/a72767cd-3c6d-47f7-80f4-aa025a17b2cb@kernel.dk
Signed-off-by: Jens Axboe

Merge tag 'for-5.16/ki_complete-2021-10-29' of git://git.kernel.dk/linux-block

2021-11-01T17:17:11+00:00

Pull kiocb->ki_complete() cleanup from Jens Axboe:
 "This removes the res2 argument from kiocb->ki_complete().

  Only the USB gadget code used it, everybody else passes 0. The USB
  guys checked the user gadget code they could find, and everybody just
  uses res as expected for the async interface"

* tag 'for-5.16/ki_complete-2021-10-29' of git://git.kernel.dk/linux-block:
  fs: get rid of the res2 iocb->ki_complete argument
  usb: remove res2 argument from gadget code completions

Merge tag 'for-5.16/bdev-size-2021-10-29' of git://git.kernel.dk/linux-block

2021-11-01T16:50:37+00:00

Pull bdev size cleanups from Jens Axboe:
 "Clean up the bdev size handling with new bdev_nr_bytes() helper"

* tag 'for-5.16/bdev-size-2021-10-29' of git://git.kernel.dk/linux-block: (34 commits)
  partitions/ibm: use bdev_nr_sectors instead of open coding it
  partitions/efi: use bdev_nr_bytes instead of open coding it
  block/ioctl: use bdev_nr_sectors and bdev_nr_bytes
  block: cache inode size in bdev
  udf: use sb_bdev_nr_blocks
  reiserfs: use sb_bdev_nr_blocks
  ntfs: use sb_bdev_nr_blocks
  jfs: use sb_bdev_nr_blocks
  ext4: use sb_bdev_nr_blocks
  block: add a sb_bdev_nr_blocks helper
  block: use bdev_nr_bytes instead of open coding it in blkdev_fallocate
  squashfs: use bdev_nr_bytes instead of open coding it
  reiserfs: use bdev_nr_bytes instead of open coding it
  pstore/blk: use bdev_nr_bytes instead of open coding it
  ntfs3: use bdev_nr_bytes instead of open coding it
  nilfs2: use bdev_nr_bytes instead of open coding it
  nfs/blocklayout: use bdev_nr_bytes instead of open coding it
  jfs: use bdev_nr_bytes instead of open coding it
  hfsplus: use bdev_nr_sectors instead of open coding it
  hfs: use bdev_nr_sectors instead of open coding it
  ...

block: add async version of bio_set_polled

2021-10-27T12:54:58+00:00

If we know that a iocb is async we can optimise bio_set_polled() a bit,
add a new helper bio_set_polled_async().

Signed-off-by: Pavel Begunkov 
Link: https://lore.kernel.org/r/8fa137885164a5d05fadcff4c3521da8d5a83d00.1635337135.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe

block: kill DIO_MULTI_BIO

2021-10-27T12:54:58+00:00

Now __blkdev_direct_IO() serves only multi-bio I/O, thus remove
not used anymore single bio refcounting optimisations.

Signed-off-by: Pavel Begunkov 
Link: https://lore.kernel.org/r/88eb488aae9ed4852a30f3a7132f296f56e43b80.1635337135.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe

block: kill unused polling bits in __blkdev_direct_IO()

2021-10-27T12:54:58+00:00

With addition of __blkdev_direct_IO_async(), __blkdev_direct_IO() now
serves only multio-bio I/O, which we don't poll. Now we can remove
anything related to I/O polling from it.

Signed-off-by: Pavel Begunkov 
Link: https://lore.kernel.org/r/b8c597a6b7ee612df394853bfd24726aee5b898e.1635337135.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe

block: avoid extra iter advance with async iocb

2021-10-27T12:54:58+00:00

Nobody cares about iov iterators state if we return -EIOCBQUEUED, so as
the we now have __blkdev_direct_IO_async(), which gets pages only once,
we can skip expensive iov_iter_advance(). It's around 1-2% of all CPU
spent.

Signed-off-by: Pavel Begunkov 
Link: https://lore.kernel.org/r/a6158edfbfa2ae3bc24aed29a72f035df18fad2f.1635337135.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe

fs: get rid of the res2 iocb->ki_complete argument

2021-10-25T16:36:24+00:00

The second argument was only used by the USB gadget code, yet everyone
pays the overhead of passing a zero to be passed into aio, where it
ends up being part of the aio res2 value.

Now that everybody is passing in zero, kill off the extra argument.

Reviewed-by: Darrick J. Wong 
Signed-off-by: Jens Axboe

block: add single bio async direct IO helper

2021-10-25T14:00:48+00:00

As with __blkdev_direct_IO_simple(), we can implement direct IO more
efficiently if there is only one bio. Add __blkdev_direct_IO_async() and
blkdev_bio_end_io_async(). This patch brings me from 4.45-4.5 MIOPS with
nullblk to 4.7+.

Signed-off-by: Pavel Begunkov 
Link: https://lore.kernel.org/r/f0ae4109b7a6934adede490f84d188d53b97051b.1635006010.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe