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| author |   Wu Fengguang <fengguang.wu@intel.com> | 2009-09-23 20:33:40 +0800 |
|---|---|---|
| committer |   Jens Axboe <jens.axboe@oracle.com> | 2009-09-25 18:08:24 +0200 |
| commit | d3ddec7635b6fb37cb49e3553bdeea59642be653 (patch) | |
| tree | 662a1ea9c0eac6aa9bb07d4f67b6aad84709600c /virt/kvm | |
| parent | writeback: balance_dirty_pages() shall write more than dirtied pages (diff) | |
| download | linux-dev-d3ddec7635b6fb37cb49e3553bdeea59642be653.tar.xz linux-dev-d3ddec7635b6fb37cb49e3553bdeea59642be653.zip | |
writeback: stop background writeback when below background threshold
Treat bdi_start_writeback(0) as a special request to do background write,
and stop such work when we are below the background dirty threshold.
Also simplify the (nr_pages <= 0) checks. Since we already pass in
nr_pages=LONG_MAX for WB_SYNC_ALL and background writes, we don't
need to worry about it being decreased to zero.
Reported-by: Richard Kennedy <richard@rsk.demon.co.uk>
CC: Jan Kara <jack@suse.cz>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'virt/kvm')
0 files changed, 0 insertions, 0 deletions