exofs: Override read-ahead to align on stripe_size

Browse source

* Set all inode->i_mapping->backing_dev_info to point to
  the per super-block sb->s_bdi.

* Calculating a read_ahead that is:
  - preferable 2 stripes long
    (Future patch will add a mount option to override this)
  - Minimum 128K aligned up to stripe-size
  - Caped to maximum-IO-sizes round down to stripe_size.
    (Max sizes are governed by max bio-size that fits in a page
     times number-of-devices)

CC: Marc Dionne <marc.c.dionne@gmail.com>
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>

...

This commit is contained in:

bharrosh@panasas.com 2010-10-07 14:28:18 -04:00 • committed by Boaz Harrosh

parent 97178b7b6c

commit 66cd6cad49

3 changed files with 35 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

fs/exofs/exofs.h

View file

19

fs/exofs/inode.c

View file

18

fs/exofs/super.c

View file