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author | Tejun Heo <tj@kernel.org> | 2015-03-04 10:37:43 -0500 |
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committer | Ben Hutchings <ben@decadent.org.uk> | 2015-05-09 23:16:30 +0100 |
commit | fc2669222243f394bedd471aa04b4c70de50768c (patch) | |
tree | 4e0a77cc8345342d08c773e793339ff54e0043c4 /usr | |
parent | bf21de36006d41407c179164387984374b846943 (diff) | |
download | kernel_samsung_smdk4412-fc2669222243f394bedd471aa04b4c70de50768c.zip kernel_samsung_smdk4412-fc2669222243f394bedd471aa04b4c70de50768c.tar.gz kernel_samsung_smdk4412-fc2669222243f394bedd471aa04b4c70de50768c.tar.bz2 |
writeback: add missing INITIAL_JIFFIES init in global_update_bandwidth()
commit 7d70e15480c0450d2bfafaad338a32e884fc215e upstream.
global_update_bandwidth() uses static variable update_time as the
timestamp for the last update but forgets to initialize it to
INITIALIZE_JIFFIES.
This means that global_dirty_limit will be 5 mins into the future on
32bit and some large amount jiffies into the past on 64bit. This
isn't critical as the only effect is that global_dirty_limit won't be
updated for the first 5 mins after booting on 32bit machines,
especially given the auxiliary nature of global_dirty_limit's role -
protecting against global dirty threshold's sudden dips; however, it
does lead to unintended suboptimal behavior. Fix it.
Fixes: c42843f2f0bb ("writeback: introduce smoothed global dirty limit")
Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Jan Kara <jack@suse.cz>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions