[lkml]   [2006]   [Jan]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] fix workqueue oops during cpu offline
On Thu, Jan 05, 2006 at 01:45:50PM -0800, Tony Luck wrote:
> On 1/4/06, Nathan Lynch <> wrote:
> > This is where things go wrong -- any_online_cpu() now gets 1, not 0.
> > In queue_work, the cpu_workqueue_struct at per_cpu_ptr(wq->cpu_wq, 1) is
> > uninitialized.
> Same issue on ia64 when I tried to add Ashok' s patch to allow
> removal of cpu0 (BSP in ia64-speak). Ashok told me that this fix
> solves the problem for us too.

Is this safe to use in NUMA path as well? Not that memory hot-remove is there
yet today, but if a NUMA node is being removed, i would assume the memory for
that node goes with it. i.e assuming alloc_percpu() gets node local memory for
each cpu.

So is it safe to continue to reference an area of an offline cpu that may not

Ashok Raj
- Open Source Technology Center
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2006-01-05 23:45    [W:0.064 / U:12.760 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site