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author | Tejun Heo <tj@kernel.org> | 2015-08-19 00:55:12 +0300 |
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committer | Jens Axboe <axboe@fb.com> | 2015-08-19 01:49:16 +0300 |
commit | 4fb72036fbf9c28de7a64b1d3f19b4ce9da1c6bf (patch) | |
tree | ec418021883beb54038b9a2c3f9aaaf3c858c171 /arch | |
parent | 001bea73e70efdf48a9e00188cf302f6b6aed2bf (diff) | |
download | linux-4fb72036fbf9c28de7a64b1d3f19b4ce9da1c6bf.tar.xz |
blk-throttle: remove asynchrnous percpu stats allocation mechanism
Because percpu allocator couldn't do non-blocking allocations,
blk-throttle was forced to implement an ad-hoc asynchronous allocation
mechanism for its percpu stats for cases where blkg's (blkcg_gq's) are
allocated from an IO path without sleepable context.
Now that percpu allocator can handle gfp_mask and blkg_policy_data
alloc / free are handled by policy methods, the ad-hoc asynchronous
allocation mechanism can be replaced with direct allocation from
tg_stats_alloc_fn(). Rit it out.
This ensures that an active throtl_grp always has valid non-NULL
->stats_cpu. Remove checks on it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'arch')
0 files changed, 0 insertions, 0 deletions