29 Mar, 2012

1 commit

• a66cc28f5   dm bufio: prefetch ... Browse Code »

  This patch introduces a new function dm_bufio_prefetch. It prefetches
  the specified range of blocks into dm-bufio cache without waiting
  for i/o completion.

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

  Mikulas Patocka

  2012-03-29 01:41:29 +0800  

04 Feb, 2012

1 commit

• ad075370b   dm-bufio.c: there's no need to include linux/version.h ... Browse Code »

  As 'make versioncheck' points out, drivers/md/dm-bufio.c has no need to include
  linux/version.h, so this patch removes the unneeded include.

  Signed-off-by: Jesper Juhl
  Acked-by: Mikulas Patocka
  Signed-off-by: Jiri Kosina

  Jesper Juhl

  2012-02-04 05:38:12 +0800  

08 Nov, 2011

1 commit

• 6f66263f8   device-mapper: dm-bufio.c needs to include module.h ... Browse Code »

  since it uses the module facilities.

  Reported-by: Witold Baryluk
  Signed-off-by: Stephen Rothwell
  Signed-off-by: Paul Gortmaker
  Signed-off-by: Linus Torvalds

  Stephen Rothwell

  2011-11-08 02:29:10 +0800  

01 Nov, 2011

1 commit

• 95d402f05   dm: add bufio ... Browse Code »

  The dm-bufio interface allows you to do cached I/O on devices,
  holding recently-read blocks in memory and performing delayed writes.

  We don't use buffer cache or page cache already present in the kernel, because:
  * we need to handle block sizes larger than a page
  * we can't allocate memory to perform reads or we'd have deadlocks

  Currently, when a cache is required, we limit its size to a fraction of
  available memory. Usage can be viewed and changed in
  /sys/module/dm_bufio/parameters/ .

  The first user is thin provisioning, but more dm users are planned.

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

  Mikulas Patocka

  2011-11-01 04:19:09 +0800