The patch titled
Subject: memcg-decrement-static-keys-at-real-destroy-time-v6-fix
has been added to the -mm tree. Its filename is
memcg-decrement-static-keys-at-real-destroy-time-v6-fix.patch
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From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: memcg-decrement-static-keys-at-real-destroy-time-v6-fix
- move enum sock_flag_bits into sock.h
- document enum sock_flag_bits
- convert memcg_proto_active() and memcg_proto_activated() to test_bit()
- redo tcp_update_limit() comment to 80 cols
Cc: Glauber Costa <glommer@xxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Li Zefan <lizefan@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memcontrol.h | 5 -----
include/net/sock.h | 15 +++++++++++++--
net/ipv4/tcp_memcontrol.c | 30 +++++++++++++++---------------
3 files changed, 28 insertions(+), 22 deletions(-)
diff -puN include/linux/memcontrol.h~memcg-decrement-static-keys-at-real-destroy-time-v6-fix include/linux/memcontrol.h
--- a/include/linux/memcontrol.h~memcg-decrement-static-keys-at-real-destroy-time-v6-fix
+++ a/include/linux/memcontrol.h
@@ -405,11 +405,6 @@ enum {
OVER_LIMIT,
};
-enum sock_flag_bits {
- MEMCG_SOCK_ACTIVE,
- MEMCG_SOCK_ACTIVATED,
-};
-
struct sock;
#ifdef CONFIG_CGROUP_MEM_RES_CTLR_KMEM
void sock_update_memcg(struct sock *sk);
diff -puN include/net/sock.h~memcg-decrement-static-keys-at-real-destroy-time-v6-fix include/net/sock.h
--- a/include/net/sock.h~memcg-decrement-static-keys-at-real-destroy-time-v6-fix
+++ a/include/net/sock.h
@@ -46,6 +46,7 @@
#include <linux/list_nulls.h>
#include <linux/timer.h>
#include <linux/cache.h>
+#include <linux/bitops.h>
#include <linux/lockdep.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h> /* struct sk_buff */
@@ -921,6 +922,16 @@ struct proto {
#endif
};
+/*
+ * Bits in struct cg_proto.flags
+ */
+enum sock_flag_bits {
+ /* Currently active and new sockets should be assigned to cgroups */
+ MEMCG_SOCK_ACTIVE,
+ /* It was ever activated; we must disarm static keys on destruction */
+ MEMCG_SOCK_ACTIVATED,
+};
+
struct cg_proto {
void (*enter_memory_pressure)(struct sock *sk);
struct res_counter *memory_allocated; /* Current allocated memory. */
@@ -945,12 +956,12 @@ extern void proto_unregister(struct prot
static inline bool memcg_proto_active(struct cg_proto *cg_proto)
{
- return cg_proto->flags & (1 << MEMCG_SOCK_ACTIVE);
+ return test_bit(MEMCG_SOCK_ACTIVE, &cg_proto->flags);
}
static inline bool memcg_proto_activated(struct cg_proto *cg_proto)
{
- return cg_proto->flags & (1 << MEMCG_SOCK_ACTIVATED);
+ return test_bit(MEMCG_SOCK_ACTIVATED, &cg_proto->flags);
}
#ifdef SOCK_REFCNT_DEBUG
diff -puN net/ipv4/tcp_memcontrol.c~memcg-decrement-static-keys-at-real-destroy-time-v6-fix net/ipv4/tcp_memcontrol.c
--- a/net/ipv4/tcp_memcontrol.c~memcg-decrement-static-keys-at-real-destroy-time-v6-fix
+++ a/net/ipv4/tcp_memcontrol.c
@@ -108,24 +108,24 @@ static int tcp_update_limit(struct mem_c
clear_bit(MEMCG_SOCK_ACTIVE, &cg_proto->flags);
else if (val != RESOURCE_MAX) {
/*
- * The active bit needs to be written after the static_key update.
- * This is what guarantees that the socket activation function
- * is the last one to run. See sock_update_memcg() for details,
- * and note that we don't mark any socket as belonging to this
- * memcg until that flag is up.
+ * The active bit needs to be written after the static_key
+ * update. This is what guarantees that the socket activation
+ * function is the last one to run. See sock_update_memcg() for
+ * details, and note that we don't mark any socket as belonging
+ * to this memcg until that flag is up.
*
- * We need to do this, because static_keys will span multiple
- * sites, but we can't control their order. If we mark a socket
- * as accounted, but the accounting functions are not patched in
- * yet, we'll lose accounting.
+ * We need to do this, because static_keys will span multiple
+ * sites, but we can't control their order. If we mark a socket
+ * as accounted, but the accounting functions are not patched in
+ * yet, we'll lose accounting.
*
- * We never race with the readers in sock_update_memcg(), because
- * when this value change, the code to process it is not patched in
- * yet.
+ * We never race with the readers in sock_update_memcg(),
+ * because when this value change, the code to process it is not
+ * patched in yet.
*
- * The activated bit is used to guarantee that no two writers will
- * do the update in the same memcg. Without that, we can't properly
- * shutdown the static key.
+ * The activated bit is used to guarantee that no two writers
+ * will do the update in the same memcg. Without that, we can't
+ * properly shutdown the static key.
*/
if (!test_and_set_bit(MEMCG_SOCK_ACTIVATED, &cg_proto->flags))
static_key_slow_inc(&memcg_socket_limit_enabled);
_
Subject: Subject: memcg-decrement-static-keys-at-real-destroy-time-v6-fix
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
origin.patch
linux-next.patch
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
drivers-block-nvmec-stop-breaking-my-i386-build.patch
drivers-staging-zsmalloc-zsmalloc-mainc-unbork.patch
arch-x86-platform-iris-irisc-register-a-platform-device-and-a-platform-driver.patch
thermal-add-generic-cpufreq-cooling-implementation-fix.patch
thermal-exynos5-add-exynos5-thermal-sensor-driver-support-fix.patch
thermal-exynos-register-the-tmu-sensor-with-the-kernel-thermal-layer-fix.patch
fs-symlink-restrictions-on-sticky-directories.patch
fs-hardlink-creation-restrictions.patch
mm.patch
hugetlb-use-mmu_gather-instead-of-a-temporary-linked-list-for-accumulating-pages-fix.patch
hugetlb-use-mmu_gather-instead-of-a-temporary-linked-list-for-accumulating-pages-fix-fix.patch
memcg-add-hugetlb-extension-fix-fix.patch
hugetlbfs-add-memcg-control-files-for-hugetlbfs-use-scnprintf-instead-of-sprintf-fix.patch
memcg-move-hugetlb-resource-count-to-parent-cgroup-on-memcg-removal-fix.patch
memcg-move-hugetlb-resource-count-to-parent-cgroup-on-memcg-removal-fix-fix.patch
hugetlb-migrate-memcg-info-from-oldpage-to-new-page-during-migration-fix.patch
mm-mmapc-find_vma-remove-unnecessary-ifmm-check-fix.patch
mm-correctly-synchronize-rss-counters-at-exit-exec.patch
mm-do_migrate_pages-calls-migrate_to_node-even-if-task-is-already-on-a-correct-node-fix.patch
mm-do_migrate_pages-rename-arguments.patch
mm-memcg-count-pte-references-from-every-member-of-the-reclaimed-hierarchy-fix.patch
mm-rename-is_mlocked_vma-to-mlocked_vma_newpage-fix.patch
mm-page_allocc-remove-pageblock_default_order.patch
mm-remove-sparsemem-allocation-details-from-the-bootmem-allocator-fix.patch
mm-page_allocc-cleanups.patch
mm-push-lru-index-into-shrink_active_list-fix.patch
memcg-fix-error-code-in-hugetlb_force_memcg_empty-v2-checkpatch-fixes.patch
mm-memcg-print-statistics-from-live-counters-checkpatch-fixes.patch
memcg-always-free-struct-memcg-through-schedule_work-fix.patch
memcg-decrement-static-keys-at-real-destroy-time-v6-fix.patch
security-keys-keyctlc-suppress-memory-allocation-failure-warning.patch
isdn-add-missing-kern_cont-fix.patch
nmi-watchdog-fix-for-lockup-detector-breakage-on-resume-fix.patch
nmi-watchdog-fix-for-lockup-detector-breakage-on-resume-fix-fix.patch
nmi-watchdog-fix-for-lockup-detector-breakage-on-resume-v2-fix.patch
kernel-irq-managec-use-the-pr_foo-infrastructure-to-prefix-printks.patch
vsprintf-correctly-handle-width-when-flag-used-in-%p-format-checkpatch-fixes.patch
vsprintf-further-optimize-decimal-conversion-checkpatch-fixes.patch
drivers-video-backlight-apple_blc-include-header-for-exported-symbol-prototypes-fix.patch
backlight-add-lm3533-backlight-driver-fix.patch
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drivers-leds-leds-pca955xc-fix-race-condition-while-setting-brightness-on-several-leds-fix.patch
lib-string_helpersc-make-arrays-static.patch
lib-bitmapc-fix-documentation-for-scnprintf-functions.patch
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kmod-avoid-deadlock-by-recursive-kmod-call.patch
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kernel-cpuc-document-clear_tasks_mm_cpumask.patch
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ipc-mqueue-improve-performance-of-send-recv-fix.patch
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ipc-mqueue-strengthen-checks-on-mqueue-creation-fix.patch
tools-selftests-add-mq_perf_tests-checkpatch-fixes.patch
ipc-mqueue-add-rbtree-node-caching-support-checkpatch-fixes.patch
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pidns-guarantee-that-the-pidns-init-will-be-the-last-pidns-process-reaped-v2-fix.patch
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notify_change-check-that-i_mutex-is-held.patch
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