On Thu, Aug 13, 2015 at 05:29:09PM -0700, David Miller wrote:
From: Martin KaFai Lau ka...@fb.com
Date: Thu, 13 Aug 2015 00:58:00 -0700
This patch series fixes a potential deadlock when creating a pcpu rt.
It happens when dst_alloc() decided to run gc. Something like this:
On Thu, Aug 13, 2015 at 12:58:00AM -0700, Martin KaFai Lau wrote:
Steinar, the patches can also be applied to 4.2-rc5 (I just tried).
Can you help to test them? Thanks!
I won't be doing a boot in the near future (I want my server to be up,
sorry :-) ), but if I _do_ have to boot, I'll be sure
This patch series fixes a potential deadlock when creating a pcpu rt.
It happens when dst_alloc() decided to run gc. Something like this:
read_lock(table-tb6_lock);
ip6_rt_pcpu_alloc()
= dst_alloc()
= ip6_dst_gc()
= write_lock(table-tb6_lock); /* oops */
Patch 1 and 2 are some prep works.
Patch
From: Martin KaFai Lau ka...@fb.com
Date: Thu, 13 Aug 2015 00:58:00 -0700
This patch series fixes a potential deadlock when creating a pcpu rt.
It happens when dst_alloc() decided to run gc. Something like this:
read_lock(table-tb6_lock);
ip6_rt_pcpu_alloc()
= dst_alloc()
= ip6_dst_gc()
