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-rw-r--r--block/blk-cgroup.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 8f630ce..4b001dc 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1645,11 +1645,12 @@ static void blkiocg_attach_task(struct cgroup *cgrp, struct task_struct *tsk)
{
struct io_context *ioc;
- task_lock(tsk);
- ioc = tsk->io_context;
- if (ioc)
+ /* we don't lose anything even if ioc allocation fails */
+ ioc = get_task_io_context(tsk, GFP_ATOMIC, NUMA_NO_NODE);
+ if (ioc) {
ioc->cgroup_changed = 1;
- task_unlock(tsk);
+ put_io_context(ioc);
+ }
}
void blkio_policy_register(struct blkio_policy_type *blkiop)
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