02 Aug, 2014

2 commits

• 56b1ebf2d   dm switch: efficiently support repetitive patterns ... Browse Code »

  Add support for quickly loading a repetitive pattern into the
  dm-switch target.

  In the "set_regions_mappings" message, the user may now use "Rn,m" as
  one of the arguments. "n" and "m" are hexadecimal numbers. The "Rn,m"
  argument repeats the last "n" arguments in the following "m" slots.

  For example:
  dmsetup message switch 0 set_region_mappings 1000:1 :2 R2,10
  is equivalent to
  dmsetup message switch 0 set_region_mappings 1000:1 :2 :1 :2 :1 :2 :1 :2 \
  :1 :2 :1 :2 :1 :2 :1 :2 :1 :2

  Requested-by: Jay Wang
  Tested-by: Jay Wang
  Signed-off-by: Mikulas Patocka
  Signed-off-by: Mike Snitzer

  Mikulas Patocka

  2014-08-02 00:30:37 +0800  
• 99eb1908e   dm switch: factor out switch_region_table_read ... Browse Code »

  Move code that reads the table to a switch_region_table_read.
  It will be needed for the next commit. No functional change.

  Tested-by: Jay Wang
  Signed-off-by: Mikulas Patocka
  Signed-off-by: Mike Snitzer

  Mikulas Patocka

  2014-08-02 00:30:36 +0800  

24 Nov, 2013

1 commit

• 4f024f379   block: Abstract out bvec iterator ... Browse Code »

  13

  Immutable biovecs are going to require an explicit iterator. To
  implement immutable bvecs, a later patch is going to add a bi_bvec_done
  member to this struct; for now, this patch effectively just renames
  things.

  Signed-off-by: Kent Overstreet
  Cc: Jens Axboe
  Cc: Geert Uytterhoeven
  Cc: Benjamin Herrenschmidt
  Cc: Paul Mackerras
  Cc: "Ed L. Cashin"
  Cc: Nick Piggin
  Cc: Lars Ellenberg
  Cc: Jiri Kosina
  Cc: Matthew Wilcox
  Cc: Geoff Levand
  Cc: Yehuda Sadeh
  Cc: Sage Weil
  Cc: Alex Elder
  Cc: ceph-devel@vger.kernel.org
  Cc: Joshua Morris
  Cc: Philip Kelleher
  Cc: Rusty Russell
  Cc: "Michael S. Tsirkin"
  Cc: Konrad Rzeszutek Wilk
  Cc: Jeremy Fitzhardinge
  Cc: Neil Brown
  Cc: Alasdair Kergon
  Cc: Mike Snitzer
  Cc: dm-devel@redhat.com
  Cc: Martin Schwidefsky
  Cc: Heiko Carstens
  Cc: linux390@de.ibm.com
  Cc: Boaz Harrosh
  Cc: Benny Halevy
  Cc: "James E.J. Bottomley"
  Cc: Greg Kroah-Hartman
  Cc: "Nicholas A. Bellinger"
  Cc: Alexander Viro
  Cc: Chris Mason
  Cc: "Theodore Ts'o"
  Cc: Andreas Dilger
  Cc: Jaegeuk Kim
  Cc: Steven Whitehouse
  Cc: Dave Kleikamp
  Cc: Joern Engel
  Cc: Prasad Joshi
  Cc: Trond Myklebust
  Cc: KONISHI Ryusuke
  Cc: Mark Fasheh
  Cc: Joel Becker
  Cc: Ben Myers
  Cc: xfs@oss.sgi.com
  Cc: Steven Rostedt
  Cc: Frederic Weisbecker
  Cc: Ingo Molnar
  Cc: Len Brown
  Cc: Pavel Machek
  Cc: "Rafael J. Wysocki"
  Cc: Herton Ronaldo Krzesinski
  Cc: Ben Hutchings
  Cc: Andrew Morton
  Cc: Guo Chao
  Cc: Tejun Heo
  Cc: Asai Thambi S P
  Cc: Selvan Mani
  Cc: Sam Bradshaw
  Cc: Wei Yongjun
  Cc: "Roger Pau Monné"
  Cc: Jan Beulich
  Cc: Stefano Stabellini
  Cc: Ian Campbell
  Cc: Sebastian Ott
  Cc: Christian Borntraeger
  Cc: Minchan Kim
  Cc: Jiang Liu
  Cc: Nitin Gupta
  Cc: Jerome Marchand
  Cc: Joe Perches
  Cc: Peng Tao
  Cc: Andy Adamson
  Cc: fanchaoting
  Cc: Jie Liu
  Cc: Sunil Mushran
  Cc: "Martin K. Petersen"
  Cc: Namjae Jeon
  Cc: Pankaj Kumar
  Cc: Dan Magenheimer
  Cc: Mel Gorman 6

  Kent Overstreet

  2013-11-24 14:33:47 +0800  

11 Jul, 2013

1 commit

• 9d0eb0ab4   dm: add switch target ... Browse Code »

  dm-switch is a new target that maps IO to underlying block devices
  efficiently when there is a large number of fixed-sized address regions
  but there is no simple pattern to allow for a compact mapping
  representation such as dm-stripe.

  Though we have developed this target for a specific storage device, Dell
  EqualLogic, we have made an effort to keep it as general purpose as
  possible in the hope that others may benefit.

  Originally developed by Jim Ramsay. Simplified by Mikulas Patocka.

  Signed-off-by: Jim Ramsay
  Signed-off-by: Mikulas Patocka
  Signed-off-by: Alasdair G Kergon

  Jim Ramsay

  2013-07-11 06:41:19 +0800