Re: [PATCH] net: fix possible deadlock in sum_frag_mem_limit

2013-02-22 Thread David Miller
From: Eric Dumazet Date: Fri, 22 Feb 2013 09:43:35 -0800 > From: Eric Dumazet > > Dave Jones reported a lockdep splat occurring in IP defrag code. > > commit 6d7b857d541ecd1d (net: use lib/percpu_counter API for > fragmentation mem accounting) added a possible deadlock. > > Because percpu_cou

[PATCH] net: fix possible deadlock in sum_frag_mem_limit

2013-02-22 Thread Eric Dumazet
From: Eric Dumazet Dave Jones reported a lockdep splat occurring in IP defrag code. commit 6d7b857d541ecd1d (net: use lib/percpu_counter API for fragmentation mem accounting) added a possible deadlock. Because percpu_counter_sum_positive() needs to acquire a lock that can be used from softirq,