linux-kernel - [PATCH 2/3] [PATCH powerpc] during VM oom condition, kill all threads in process group

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Message-ID: <20070605174838.21740.55720.stgit@farscape.rchland.ibm.com>
Date:	Tue, 05 Jun 2007 12:48:38 -0500
From:	Will Schmidt <will_schmidt@...t.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	anton@...ba.org, liuxppc-dev@...abs.org, will_schmidt@...t.ibm.com
Subject: [PATCH 2/3] [PATCH powerpc] during VM oom condition,
	kill all threads in process group


When we get into a state where VM has ran out of memory, and it's time to
thwack a process, we should take out the entire process group, rather than
just one thread.

Tested on POWER5.

Signed-off-by: Will Schmidt <will_schmidt@...t.ibm.com>
---

 arch/powerpc/mm/fault.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 03aeb3a..9afe871 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -392,8 +392,10 @@ out_of_memory:
 		goto survive;
 	}
 	printk("VM: killing process %s\n", current->comm);
-	if (user_mode(regs))
+	if (user_mode(regs)) {
+		zap_other_threads(current);
 		do_exit(SIGKILL);
+	}
 	return SIGKILL;
 
 do_sigbus:


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