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[S390] init task memory faults.
author
Akinobu Mita
<mita@miraclelinux.com>
Thu, 28 Sep 2006 14:55:18 +0000
(16:55 +0200)
committer
Martin Schwidefsky
<schwidefsky@de.ibm.com>
Thu, 28 Sep 2006 14:55:18 +0000
(16:55 +0200)
Lock for mmap_sem is missing on page fault retry for init task
when it fails due to out of memory.
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch/s390/mm/fault.c
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diff --git
a/arch/s390/mm/fault.c
b/arch/s390/mm/fault.c
index 44f0cda7e72e44bb9ae47e6fc42fd284ceb430ab..a393c308bb290d1a0827310653ed205312857f34 100644
(file)
--- a/
arch/s390/mm/fault.c
+++ b/
arch/s390/mm/fault.c
@@
-355,6
+355,7
@@
out_of_memory:
up_read(&mm->mmap_sem);
if (tsk->pid == 1) {
yield();
+ down_read(&mm->mmap_sem);
goto survive;
}
printk("VM: killing process %s\n", tsk->comm);