22 Jun, 2009

1 commit

• a72986c56   dm raid1: keep retrying alloc if mempool_alloc failed ... Browse Code »

  If the code can't handle allocation failures, use __GFP_NOFAIL so that
  in case of memory pressure the allocator will retry indefinitely and
  won't return NULL which would cause a crash in the function.

  This is still not a correct fix, it may cause a classic deadlock when
  memory manager waits for I/O being done and I/O waits for some free memory.
  I/O code shouldn't allocate any memory. But in this case it probably
  doesn't matter much in practice, people usually do not swap on RAID.

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

  Mikulas Patocka

  2009-06-22 17:12:13 +0800  

15 Apr, 2009

1 commit

• 8f3d8ba20   block: move bio list helpers into bio.h ... Browse Code »

  It's used by DM and MD and generally useful, so move the bio list
  helpers into bio.h.

  Signed-off-by: Christoph Hellwig
  Acked-by: Alasdair G Kergon
  Signed-off-by: Jens Axboe

  Christoph Hellwig

  2009-04-15 14:28:09 +0800  

22 Oct, 2008

1 commit

• 1f965b194   dm raid1: separate region_hash interface part1 ... Browse Code »

  Separate the region hash code from raid1 so it can be shared by forthcoming
  targets. Use BUG_ON() for failed async dm_io() calls.

  Signed-off-by: Heinz Mauelshagen
  Signed-off-by: Alasdair G Kergon

  Heinz Mauelshagen

  2008-10-22 00:45:06 +0800