sh: invoke oom-killer from page fault
Nick Piggin [Thu, 22 Apr 2010 16:06:26 +0000 (16:06 +0000)]
As explained in commit 1c0fe6e3bd, we want to call the architecture independent
oom killer when getting an unexplained OOM from handle_mm_fault, rather than
simply killing current.

Cc: linux-sh@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/mm/fault_32.c
arch/sh/mm/tlbflush_64.c

index 8bf79e3..93c3447 100644 (file)
@@ -290,15 +290,10 @@ no_context:
  */
 out_of_memory:
        up_read(&mm->mmap_sem);
-       if (is_global_init(current)) {
-               yield();
-               down_read(&mm->mmap_sem);
-               goto survive;
-       }
-       printk("VM: killing process %s\n", tsk->comm);
-       if (user_mode(regs))
-               do_group_exit(SIGKILL);
-       goto no_context;
+       if (!user_mode(regs))
+               goto no_context;
+       pagefault_out_of_memory();
+       return;
 
 do_sigbus:
        up_read(&mm->mmap_sem);
index 706da1d..25bd64c 100644 (file)
@@ -294,22 +294,11 @@ no_context:
  * us unable to handle the page fault gracefully.
  */
 out_of_memory:
-       if (is_global_init(current)) {
-               panic("INIT out of memory\n");
-               yield();
-               goto survive;
-       }
-       printk("fault:Out of memory\n");
        up_read(&mm->mmap_sem);
-       if (is_global_init(current)) {
-               yield();
-               down_read(&mm->mmap_sem);
-               goto survive;
-       }
-       printk("VM: killing process %s\n", tsk->comm);
-       if (user_mode(regs))
-               do_group_exit(SIGKILL);
-       goto no_context;
+       if (!user_mode(regs))
+               goto no_context;
+       pagefault_out_of_memory();
+       return;
 
 do_sigbus:
        printk("fault:Do sigbus\n");