[patch 08/14] microblaze: invoke oom-killer from page fault

npiggin
2010-04-22T16:17:43Z

[-- Attachment #1: microblaze-pagefault-use-oom.patch --]
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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: microblaze-uclinux@itee.uq.edu.au
Cc: Michal Simek <monstr@monstr.eu>
Cc: linux-arch@vger.kernel.org
Signed-off-by: Nick Piggin <npiggin@suse.de>
---
Index: linux-2.6/arch/microblaze/mm/fault.c
===================================================================
--- linux-2.6.orig/arch/microblaze/mm/fault.c
+++ linux-2.6/arch/microblaze/mm/fault.c
@@ -273,16 +273,11 @@ bad_area_nosemaphore:
* us unable to handle the page fault gracefully.
*/
out_of_memory:
- if (current->pid == 1) {
- yield();
- down_read(&mm->mmap_sem);
- goto survive;
- }
up_read(&mm->mmap_sem);
- printk(KERN_WARNING "VM: killing process %s\n", current->comm);
- if (user_mode(regs))
- do_exit(SIGKILL);
- bad_page_fault(regs, address, SIGKILL);
+ if (!user_mode(regs))
+ bad_page_fault(regs, address, SIGKILL);
+ else
+ pagefault_out_of_memory();
return;