From: Oren Laadan <[email protected]> One may not call task_pid_vnr() on dead tasks because they don't have a valid ->nxproxy pointer. However, the ckpt_ctx cleanup may be called by a dead task from do_exit(), in the case of zombie or "ghost" tasks.
This patch makes ckpt_debug() safe to call from dead tasks context, so that debug printing from code called by ckpt_ctx_free() is cool. Signed-off-by: Oren Laadan <[email protected]> --- include/linux/checkpoint.h | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/include/linux/checkpoint.h b/include/linux/checkpoint.h index e00dd70..5294a96 100644 --- a/include/linux/checkpoint.h +++ b/include/linux/checkpoint.h @@ -334,7 +334,9 @@ extern unsigned long ckpt_debug_level; do { \ if (ckpt_debug_level & (level)) \ printk(KERN_DEBUG "[%d:%d:c/r:%s:%d] " fmt, \ - current->pid, task_pid_vnr(current), \ + current->pid, \ + current->nsproxy ? \ + task_pid_vnr(current) : -1, \ __func__, __LINE__, ## args); \ } while (0) -- 1.6.0.4 _______________________________________________ Containers mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/containers _______________________________________________ Devel mailing list [email protected] https://openvz.org/mailman/listinfo/devel
