Messages in this thread | | | Subject | Re: [PATCH 2/2] dm: stay in blk_queue_bypass until queue becomes initialized | From | Peter Zijlstra <> | Date | Mon, 29 Oct 2012 17:45:15 +0100 |
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On Mon, 2012-10-29 at 12:38 -0400, Vivek Goyal wrote: > Ok, so the question is what's wrong with calling synchronize_rcu() inside > a mutex with CONFIG_PREEMPT=y. I don't know. Ccing paul mckenney and > peterz.
int blkcg_activate_policy(struct request_queue *q,
{
...
preloaded = !radix_tree_preload(GFP_KERNEL);
blk_queue_bypass_start(q);
where:
int radix_tree_preload(gfp_t gfp_mask) { struct radix_tree_preload *rtp; struct radix_tree_node *node; int ret = -ENOMEM; preempt_disable();
Seems obvious why it explodes..
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