The patch titled
CPU hotplug broken with 2GB VMSPLIT
has been added to the -mm tree. Its filename is
cpu-hotplug-broken-with-2gb-vmsplit.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: CPU hotplug broken with 2GB VMSPLIT
From: Shaohua Li <shaohua.li@xxxxxxxxx>
In VMSPLIT mode, kernel PGD might have more entries than user space.
Acked-by: Jens Axboe <jens.axboe@xxxxxxxxxx>
Signed-off-by: Shaohua Li <shaohua.li@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/i386/kernel/smpboot.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN arch/i386/kernel/smpboot.c~cpu-hotplug-broken-with-2gb-vmsplit arch/i386/kernel/smpboot.c
--- a/arch/i386/kernel/smpboot.c~cpu-hotplug-broken-with-2gb-vmsplit
+++ a/arch/i386/kernel/smpboot.c
@@ -1118,7 +1118,7 @@ static int __cpuinit __smp_prepare_cpu(i
/* init low mem mapping */
clone_pgd_range(swapper_pg_dir, swapper_pg_dir + USER_PGD_PTRS,
- KERNEL_PGD_PTRS);
+ min_t(unsigned long, KERNEL_PGD_PTRS, USER_PGD_PTRS));
flush_tlb_all();
schedule_work(&info.task);
wait_for_completion(&done);
_
Patches currently in -mm which might be from shaohua.li@xxxxxxxxx are
origin.patch
cpu-hotplug-broken-with-2gb-vmsplit.patch
-
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