Hi Andrew,
After merging the akpm-current tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:
arm-linux-gnueabi-ld: kernel/sysctl.o: in function `.LANCHOR0':
sysctl.c:(.data+0x7b4): undefined reference to `fragment_stall_order_sysctl_handler'
Caused by commit
a247ff3201c1 ("mm: stall movable allocations until kswapd progresses during serious external fragmentation event")
The fragment_stall_order_sysctl_handler() definition is protected by
CONFIG_NUMA, so I added this fix patch for today:
From: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Date: Wed, 5 Dec 2018 16:05:51 +1100
Subject: [PATCH] mm: fix for "stall movable allocations until kswapd
progresses during serious external fragmentation event"
Signed-off-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
---
kernel/sysctl.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 2f445c82fe38..93352cfb3239 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1487,6 +1487,7 @@ static struct ctl_table vm_table[] = {
.extra1 = &one,
.extra2 = &one_thousand,
},
+#ifdef CONFIG_NUMA
{
.procname = "fragment_stall_order",
.data = &fragment_stall_order,
@@ -1496,6 +1497,7 @@ static struct ctl_table vm_table[] = {
.extra1 = &zero,
.extra2 = &max_order,
},
+#endif
{
.procname = "percpu_pagelist_fraction",
.data = &percpu_pagelist_fraction,
--
2.19.1
--
Cheers,
Stephen Rothwell
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