The patch titled
Subject: mm: memcontrol: export root_mem_cgroup
has been added to the -mm tree. Its filename is
mm-memcontrol-export-root_mem_cgroup.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-export-root_mem_cgroup.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-export-root_mem_cgroup.patch
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------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: mm: memcontrol: export root_mem_cgroup
A later patch will need this symbol in files other than memcontrol.c, so
export it now and replace mem_cgroup_root_css at the same time.
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
Reviewed-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memcontrol.h | 3 ++-
mm/backing-dev.c | 2 +-
mm/memcontrol.c | 5 ++---
3 files changed, 5 insertions(+), 5 deletions(-)
diff -puN include/linux/memcontrol.h~mm-memcontrol-export-root_mem_cgroup include/linux/memcontrol.h
--- a/include/linux/memcontrol.h~mm-memcontrol-export-root_mem_cgroup
+++ a/include/linux/memcontrol.h
@@ -265,7 +265,8 @@ struct mem_cgroup {
struct mem_cgroup_per_node *nodeinfo[0];
/* WARNING: nodeinfo must be the last member here */
};
-extern struct cgroup_subsys_state *mem_cgroup_root_css;
+
+extern struct mem_cgroup *root_mem_cgroup;
/**
* mem_cgroup_events - count memory events against a cgroup
diff -puN mm/backing-dev.c~mm-memcontrol-export-root_mem_cgroup mm/backing-dev.c
--- a/mm/backing-dev.c~mm-memcontrol-export-root_mem_cgroup
+++ a/mm/backing-dev.c
@@ -672,7 +672,7 @@ static int cgwb_bdi_init(struct backing_
ret = wb_init(&bdi->wb, bdi, 1, GFP_KERNEL);
if (!ret) {
- bdi->wb.memcg_css = mem_cgroup_root_css;
+ bdi->wb.memcg_css = &root_mem_cgroup->css;
bdi->wb.blkcg_css = blkcg_root_css;
}
return ret;
diff -puN mm/memcontrol.c~mm-memcontrol-export-root_mem_cgroup mm/memcontrol.c
--- a/mm/memcontrol.c~mm-memcontrol-export-root_mem_cgroup
+++ a/mm/memcontrol.c
@@ -76,9 +76,9 @@
struct cgroup_subsys memory_cgrp_subsys __read_mostly;
EXPORT_SYMBOL(memory_cgrp_subsys);
+struct mem_cgroup *root_mem_cgroup __read_mostly;
+
#define MEM_CGROUP_RECLAIM_RETRIES 5
-static struct mem_cgroup *root_mem_cgroup __read_mostly;
-struct cgroup_subsys_state *mem_cgroup_root_css __read_mostly;
/* Whether the swap controller is active */
#ifdef CONFIG_MEMCG_SWAP
@@ -4217,7 +4217,6 @@ mem_cgroup_css_alloc(struct cgroup_subsy
/* root ? */
if (parent_css == NULL) {
root_mem_cgroup = memcg;
- mem_cgroup_root_css = &memcg->css;
page_counter_init(&memcg->memory, NULL);
memcg->high = PAGE_COUNTER_MAX;
memcg->soft_limit = PAGE_COUNTER_MAX;
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
maintainers-make-vladimir-co-maintainer-of-the-memory-controller.patch
mm-page_alloc-generalize-the-dirty-balance-reserve.patch
proc-meminfo-estimate-available-memory-more-conservatively.patch
mm-memcontrol-export-root_mem_cgroup.patch
net-tcp_memcontrol-properly-detect-ancestor-socket-pressure.patch
net-tcp_memcontrol-remove-bogus-hierarchy-pressure-propagation.patch
net-tcp_memcontrol-protect-all-tcp_memcontrol-calls-by-jump-label.patch
net-tcp_memcontrol-remove-dead-per-memcg-count-of-allocated-sockets.patch
net-tcp_memcontrol-simplify-the-per-memcg-limit-access.patch
net-tcp_memcontrol-sanitize-tcp-memory-accounting-callbacks.patch
net-tcp_memcontrol-simplify-linkage-between-socket-and-page-counter.patch
mm-memcontrol-generalize-the-socket-accounting-jump-label.patch
mm-memcontrol-do-not-account-memoryswap-on-unified-hierarchy.patch
mm-memcontrol-move-socket-code-for-unified-hierarchy-accounting.patch
mm-memcontrol-account-socket-memory-in-unified-hierarchy-memory-controller.patch
mm-memcontrol-hook-up-vmpressure-to-socket-pressure.patch
mm-memcontrol-switch-to-the-updated-jump-label-api.patch
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