On Thu, Aug 13, 2015 at 05:29:09PM -0700, David Miller wrote:
> From: Martin KaFai Lau
> 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(&ta
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
From: Martin KaFai Lau
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()
> =
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.
