#11658 BLOC Not Tri: OS28: Crashes in S/R on a busy network - related to WOL

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#11658: OS28: Crashes in S/R on a busy network - related to WOL
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           Reporter:  martin.langhoff  |       Owner:  dilinger     
               Type:  defect           |      Status:  new          
           Priority:  blocker          |   Milestone:  Not Triaged  
          Component:  kernel           |     Version:  not specified
         Resolution:                   |    Keywords:               
        Next_action:  never set        |    Verified:  0            
Deployment_affected:                   |   Blockedby:               
           Blocking:                   |  
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Comment(by pgf):

 wol_hang-8.noesc  is from a kernel now patched with 1220526, for more
 output.  in addition, there's now a flush_cache_all() at the end of
 printk, to eliminate the junk we're getting at the log rollover point:

 {{{
 diff --git a/kernel/printk.c b/kernel/printk.c
 index a032d5e..0eab4e1 100644
 --- a/kernel/printk.c
 +++ b/kernel/printk.c
 @@ -16,6 +16,8 @@
   *     01Mar01 Andrew Morton
   */

 +#include <asm/cacheflush.h>
 +
  #include <linux/kernel.h>
  #include <linux/mm.h>
  #include <linux/tty.h>
 @@ -832,6 +834,8 @@ static inline void printk_delay(void)
         }
  }

 +extern bool olpc_xo_1_75_is_suspending;
 +
  asmlinkage int vprintk(const char *fmt, va_list args)
  {
         int printed_len = 0;
 @@ -969,6 +973,9 @@ asmlinkage int vprintk(const char *fmt, va_list args)
  out_restore_irqs:
         raw_local_irq_restore(flags);

 +       if (unlikely(olpc_xo_1_75_is_suspending))
 +           flush_cache_all();
 +
         preempt_enable();
         return printed_len;
  }

 }}}

-- 
Ticket URL: <http://dev.laptop.org/ticket/11658#comment:4>
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