summaryrefslogtreecommitdiff
path: root/fs/btrfs
diff options
context:
space:
mode:
authorJosef Bacik <josef@redhat.com>2010-05-23 11:00:55 -0400
committerChris Mason <chris.mason@oracle.com>2010-05-25 10:34:56 -0400
commitc2c6ca417e2db7a519e6e92c82f4a933d940d076 (patch)
tree4b5f71682270b151e38e9649a40da30564dacfdd /fs/btrfs
parentfacd07b07d2a7988f5ce849558838cc953847637 (diff)
direct-io: do not merge logically non-contiguous requests
Btrfs cannot handle having logically non-contiguous requests submitted. For example if you have Logical: [0-4095][HOLE][8192-12287] Physical: [0-4095] [4096-8191] Normally the DIO code would put these into the same BIO's. The problem is we need to know exactly what offset is associated with what BIO so we can do our checksumming and unlocking properly, so putting them in the same BIO doesn't work. So add another check where we submit the current BIO if the physical blocks are not contigous OR the logical blocks are not contiguous. Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs')
0 files changed, 0 insertions, 0 deletions