* [PATCH -mm 2/3] page-cgroup: get rid of NR_PCG_FLAGS
2014-06-24 16:33 [PATCH -mm 1/3] page-cgroup: trivial cleanup Vladimir Davydov
@ 2014-06-24 16:33 ` Vladimir Davydov
2014-06-25 4:01 ` Johannes Weiner
2014-06-25 6:55 ` Michal Hocko
2014-06-24 16:33 ` [PATCH -mm 3/3] page-cgroup: fix flags definition Vladimir Davydov
` (2 subsequent siblings)
3 siblings, 2 replies; 10+ messages in thread
From: Vladimir Davydov @ 2014-06-24 16:33 UTC (permalink / raw)
To: akpm; +Cc: hannes, mhocko, linux-kernel, linux-mm
It's not used anywhere today, so let's remove it.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
---
include/linux/page_cgroup.h | 6 ------
kernel/bounds.c | 2 --
2 files changed, 8 deletions(-)
diff --git a/include/linux/page_cgroup.h b/include/linux/page_cgroup.h
index 23863edb95ff..fb60e4a466c0 100644
--- a/include/linux/page_cgroup.h
+++ b/include/linux/page_cgroup.h
@@ -6,12 +6,8 @@ enum {
PCG_USED, /* This page is charged to a memcg */
PCG_MEM, /* This page holds a memory charge */
PCG_MEMSW, /* This page holds a memory+swap charge */
- __NR_PCG_FLAGS,
};
-#ifndef __GENERATING_BOUNDS_H
-#include <generated/bounds.h>
-
struct pglist_data;
#ifdef CONFIG_MEMCG
@@ -107,6 +103,4 @@ static inline void swap_cgroup_swapoff(int type)
#endif /* CONFIG_MEMCG_SWAP */
-#endif /* !__GENERATING_BOUNDS_H */
-
#endif /* __LINUX_PAGE_CGROUP_H */
diff --git a/kernel/bounds.c b/kernel/bounds.c
index 9fd4246b04b8..e1d1d1952bfa 100644
--- a/kernel/bounds.c
+++ b/kernel/bounds.c
@@ -9,7 +9,6 @@
#include <linux/page-flags.h>
#include <linux/mmzone.h>
#include <linux/kbuild.h>
-#include <linux/page_cgroup.h>
#include <linux/log2.h>
#include <linux/spinlock_types.h>
@@ -18,7 +17,6 @@ void foo(void)
/* The enum constants to put into include/generated/bounds.h */
DEFINE(NR_PAGEFLAGS, __NR_PAGEFLAGS);
DEFINE(MAX_NR_ZONES, __MAX_NR_ZONES);
- DEFINE(NR_PCG_FLAGS, __NR_PCG_FLAGS);
#ifdef CONFIG_SMP
DEFINE(NR_CPUS_BITS, ilog2(CONFIG_NR_CPUS));
#endif
--
1.7.10.4
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^ permalink raw reply [flat|nested] 10+ messages in thread* Re: [PATCH -mm 2/3] page-cgroup: get rid of NR_PCG_FLAGS
2014-06-24 16:33 ` [PATCH -mm 2/3] page-cgroup: get rid of NR_PCG_FLAGS Vladimir Davydov
@ 2014-06-25 4:01 ` Johannes Weiner
2014-06-25 6:55 ` Michal Hocko
1 sibling, 0 replies; 10+ messages in thread
From: Johannes Weiner @ 2014-06-25 4:01 UTC (permalink / raw)
To: Vladimir Davydov; +Cc: akpm, mhocko, linux-kernel, linux-mm
On Tue, Jun 24, 2014 at 08:33:05PM +0400, Vladimir Davydov wrote:
> It's not used anywhere today, so let's remove it.
>
> Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
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^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH -mm 2/3] page-cgroup: get rid of NR_PCG_FLAGS
2014-06-24 16:33 ` [PATCH -mm 2/3] page-cgroup: get rid of NR_PCG_FLAGS Vladimir Davydov
2014-06-25 4:01 ` Johannes Weiner
@ 2014-06-25 6:55 ` Michal Hocko
1 sibling, 0 replies; 10+ messages in thread
From: Michal Hocko @ 2014-06-25 6:55 UTC (permalink / raw)
To: Vladimir Davydov; +Cc: akpm, hannes, linux-kernel, linux-mm
On Tue 24-06-14 20:33:05, Vladimir Davydov wrote:
> It's not used anywhere today, so let's remove it.
>
> Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
> ---
> include/linux/page_cgroup.h | 6 ------
> kernel/bounds.c | 2 --
> 2 files changed, 8 deletions(-)
>
> diff --git a/include/linux/page_cgroup.h b/include/linux/page_cgroup.h
> index 23863edb95ff..fb60e4a466c0 100644
> --- a/include/linux/page_cgroup.h
> +++ b/include/linux/page_cgroup.h
> @@ -6,12 +6,8 @@ enum {
> PCG_USED, /* This page is charged to a memcg */
> PCG_MEM, /* This page holds a memory charge */
> PCG_MEMSW, /* This page holds a memory+swap charge */
> - __NR_PCG_FLAGS,
> };
>
> -#ifndef __GENERATING_BOUNDS_H
> -#include <generated/bounds.h>
> -
> struct pglist_data;
>
> #ifdef CONFIG_MEMCG
> @@ -107,6 +103,4 @@ static inline void swap_cgroup_swapoff(int type)
>
> #endif /* CONFIG_MEMCG_SWAP */
>
> -#endif /* !__GENERATING_BOUNDS_H */
> -
> #endif /* __LINUX_PAGE_CGROUP_H */
> diff --git a/kernel/bounds.c b/kernel/bounds.c
> index 9fd4246b04b8..e1d1d1952bfa 100644
> --- a/kernel/bounds.c
> +++ b/kernel/bounds.c
> @@ -9,7 +9,6 @@
> #include <linux/page-flags.h>
> #include <linux/mmzone.h>
> #include <linux/kbuild.h>
> -#include <linux/page_cgroup.h>
> #include <linux/log2.h>
> #include <linux/spinlock_types.h>
>
> @@ -18,7 +17,6 @@ void foo(void)
> /* The enum constants to put into include/generated/bounds.h */
> DEFINE(NR_PAGEFLAGS, __NR_PAGEFLAGS);
> DEFINE(MAX_NR_ZONES, __MAX_NR_ZONES);
> - DEFINE(NR_PCG_FLAGS, __NR_PCG_FLAGS);
> #ifdef CONFIG_SMP
> DEFINE(NR_CPUS_BITS, ilog2(CONFIG_NR_CPUS));
> #endif
> --
> 1.7.10.4
>
> --
> To unsubscribe, send a message with 'unsubscribe linux-mm' in
> the body to majordomo@kvack.org. For more info on Linux MM,
> see: http://www.linux-mm.org/ .
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--
Michal Hocko
SUSE Labs
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^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH -mm 3/3] page-cgroup: fix flags definition
2014-06-24 16:33 [PATCH -mm 1/3] page-cgroup: trivial cleanup Vladimir Davydov
2014-06-24 16:33 ` [PATCH -mm 2/3] page-cgroup: get rid of NR_PCG_FLAGS Vladimir Davydov
@ 2014-06-24 16:33 ` Vladimir Davydov
2014-06-24 23:20 ` Andrew Morton
2014-06-25 6:58 ` Michal Hocko
2014-06-25 4:01 ` [PATCH -mm 1/3] page-cgroup: trivial cleanup Johannes Weiner
2014-06-25 6:52 ` Michal Hocko
3 siblings, 2 replies; 10+ messages in thread
From: Vladimir Davydov @ 2014-06-24 16:33 UTC (permalink / raw)
To: akpm; +Cc: hannes, mhocko, linux-kernel, linux-mm
Since commit a9ce315aaec1f ("mm: memcontrol: rewrite uncharge API"),
PCG_* flags are used as bit masks, but they are still defined in a enum
as bit numbers. Fix it.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
---
include/linux/page_cgroup.h | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/include/linux/page_cgroup.h b/include/linux/page_cgroup.h
index fb60e4a466c0..9065a61345a1 100644
--- a/include/linux/page_cgroup.h
+++ b/include/linux/page_cgroup.h
@@ -1,12 +1,10 @@
#ifndef __LINUX_PAGE_CGROUP_H
#define __LINUX_PAGE_CGROUP_H
-enum {
- /* flags for mem_cgroup */
- PCG_USED, /* This page is charged to a memcg */
- PCG_MEM, /* This page holds a memory charge */
- PCG_MEMSW, /* This page holds a memory+swap charge */
-};
+/* flags for mem_cgroup */
+#define PCG_USED 0x01 /* This page is charged to a memcg */
+#define PCG_MEM 0x02 /* This page holds a memory charge */
+#define PCG_MEMSW 0x04 /* This page holds a memory+swap charge */
struct pglist_data;
@@ -44,7 +42,7 @@ struct page *lookup_cgroup_page(struct page_cgroup *pc);
static inline int PageCgroupUsed(struct page_cgroup *pc)
{
- return test_bit(PCG_USED, &pc->flags);
+ return !!(pc->flags & PCG_USED);
}
#else /* !CONFIG_MEMCG */
struct page_cgroup;
--
1.7.10.4
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^ permalink raw reply [flat|nested] 10+ messages in thread* Re: [PATCH -mm 3/3] page-cgroup: fix flags definition
2014-06-24 16:33 ` [PATCH -mm 3/3] page-cgroup: fix flags definition Vladimir Davydov
@ 2014-06-24 23:20 ` Andrew Morton
2014-06-25 4:05 ` Johannes Weiner
2014-06-25 6:58 ` Michal Hocko
1 sibling, 1 reply; 10+ messages in thread
From: Andrew Morton @ 2014-06-24 23:20 UTC (permalink / raw)
To: Vladimir Davydov; +Cc: hannes, mhocko, linux-kernel, linux-mm
On Tue, 24 Jun 2014 20:33:06 +0400 Vladimir Davydov <vdavydov@parallels.com> wrote:
> Since commit a9ce315aaec1f ("mm: memcontrol: rewrite uncharge API"),
> PCG_* flags are used as bit masks, but they are still defined in a enum
> as bit numbers. Fix it.
>
> ...
>
> --- a/include/linux/page_cgroup.h
> +++ b/include/linux/page_cgroup.h
> @@ -1,12 +1,10 @@
> #ifndef __LINUX_PAGE_CGROUP_H
> #define __LINUX_PAGE_CGROUP_H
>
> -enum {
> - /* flags for mem_cgroup */
> - PCG_USED, /* This page is charged to a memcg */
> - PCG_MEM, /* This page holds a memory charge */
> - PCG_MEMSW, /* This page holds a memory+swap charge */
> -};
> +/* flags for mem_cgroup */
> +#define PCG_USED 0x01 /* This page is charged to a memcg */
> +#define PCG_MEM 0x02 /* This page holds a memory charge */
> +#define PCG_MEMSW 0x04 /* This page holds a memory+swap charge */
>
> struct pglist_data;
>
> @@ -44,7 +42,7 @@ struct page *lookup_cgroup_page(struct page_cgroup *pc);
>
> static inline int PageCgroupUsed(struct page_cgroup *pc)
> {
> - return test_bit(PCG_USED, &pc->flags);
> + return !!(pc->flags & PCG_USED);
> }
> #else /* !CONFIG_MEMCG */
> struct page_cgroup;
hm, yes, whoops. I think I'll redo this as a fix against
mm-memcontrol-rewrite-uncharge-api.patch:
--- a/include/linux/page_cgroup.h~page-cgroup-fix-flags-definition
+++ a/include/linux/page_cgroup.h
@@ -3,9 +3,9 @@
enum {
/* flags for mem_cgroup */
- PCG_USED, /* This page is charged to a memcg */
- PCG_MEM, /* This page holds a memory charge */
- PCG_MEMSW, /* This page holds a memory+swap charge */
+ PCG_USED = 0x01, /* This page is charged to a memcg */
+ PCG_MEM = 0x02, /* This page holds a memory charge */
+ PCG_MEMSW = 0x04, /* This page holds a memory+swap charge */
__NR_PCG_FLAGS,
};
@@ -46,7 +46,7 @@ struct page *lookup_cgroup_page(struct p
static inline int PageCgroupUsed(struct page_cgroup *pc)
{
- return test_bit(PCG_USED, &pc->flags);
+ return !!(pc->flags & PCG_USED);
}
#else /* CONFIG_MEMCG */
_
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^ permalink raw reply [flat|nested] 10+ messages in thread* Re: [PATCH -mm 3/3] page-cgroup: fix flags definition
2014-06-24 23:20 ` Andrew Morton
@ 2014-06-25 4:05 ` Johannes Weiner
0 siblings, 0 replies; 10+ messages in thread
From: Johannes Weiner @ 2014-06-25 4:05 UTC (permalink / raw)
To: Andrew Morton; +Cc: Vladimir Davydov, mhocko, linux-kernel, linux-mm
On Tue, Jun 24, 2014 at 04:20:52PM -0700, Andrew Morton wrote:
> On Tue, 24 Jun 2014 20:33:06 +0400 Vladimir Davydov <vdavydov@parallels.com> wrote:
>
> > Since commit a9ce315aaec1f ("mm: memcontrol: rewrite uncharge API"),
> > PCG_* flags are used as bit masks, but they are still defined in a enum
> > as bit numbers. Fix it.
> >
> > ...
> >
> > --- a/include/linux/page_cgroup.h
> > +++ b/include/linux/page_cgroup.h
> > @@ -1,12 +1,10 @@
> > #ifndef __LINUX_PAGE_CGROUP_H
> > #define __LINUX_PAGE_CGROUP_H
> >
> > -enum {
> > - /* flags for mem_cgroup */
> > - PCG_USED, /* This page is charged to a memcg */
> > - PCG_MEM, /* This page holds a memory charge */
> > - PCG_MEMSW, /* This page holds a memory+swap charge */
> > -};
> > +/* flags for mem_cgroup */
> > +#define PCG_USED 0x01 /* This page is charged to a memcg */
> > +#define PCG_MEM 0x02 /* This page holds a memory charge */
> > +#define PCG_MEMSW 0x04 /* This page holds a memory+swap charge */
> >
> > struct pglist_data;
> >
> > @@ -44,7 +42,7 @@ struct page *lookup_cgroup_page(struct page_cgroup *pc);
> >
> > static inline int PageCgroupUsed(struct page_cgroup *pc)
> > {
> > - return test_bit(PCG_USED, &pc->flags);
> > + return !!(pc->flags & PCG_USED);
> > }
> > #else /* !CONFIG_MEMCG */
> > struct page_cgroup;
>
> hm, yes, whoops. I think I'll redo this as a fix against
> mm-memcontrol-rewrite-uncharge-api.patch:
Ouch, yes please. Thanks for catching this, Vladimir.
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
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^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH -mm 3/3] page-cgroup: fix flags definition
2014-06-24 16:33 ` [PATCH -mm 3/3] page-cgroup: fix flags definition Vladimir Davydov
2014-06-24 23:20 ` Andrew Morton
@ 2014-06-25 6:58 ` Michal Hocko
1 sibling, 0 replies; 10+ messages in thread
From: Michal Hocko @ 2014-06-25 6:58 UTC (permalink / raw)
To: Vladimir Davydov; +Cc: akpm, hannes, linux-kernel, linux-mm
On Tue 24-06-14 20:33:06, Vladimir Davydov wrote:
> Since commit a9ce315aaec1f ("mm: memcontrol: rewrite uncharge API"),
I guess the sha comes from linux-next. Andrew will probably just fold
this into mm-memcontrol-rewrite-uncharge-api.patch but the sha should be
removed otherwise.
> PCG_* flags are used as bit masks, but they are still defined in a enum
> as bit numbers. Fix it.
>
> Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
> ---
> include/linux/page_cgroup.h | 12 +++++-------
> 1 file changed, 5 insertions(+), 7 deletions(-)
>
> diff --git a/include/linux/page_cgroup.h b/include/linux/page_cgroup.h
> index fb60e4a466c0..9065a61345a1 100644
> --- a/include/linux/page_cgroup.h
> +++ b/include/linux/page_cgroup.h
> @@ -1,12 +1,10 @@
> #ifndef __LINUX_PAGE_CGROUP_H
> #define __LINUX_PAGE_CGROUP_H
>
> -enum {
> - /* flags for mem_cgroup */
> - PCG_USED, /* This page is charged to a memcg */
> - PCG_MEM, /* This page holds a memory charge */
> - PCG_MEMSW, /* This page holds a memory+swap charge */
> -};
> +/* flags for mem_cgroup */
> +#define PCG_USED 0x01 /* This page is charged to a memcg */
> +#define PCG_MEM 0x02 /* This page holds a memory charge */
> +#define PCG_MEMSW 0x04 /* This page holds a memory+swap charge */
>
> struct pglist_data;
>
> @@ -44,7 +42,7 @@ struct page *lookup_cgroup_page(struct page_cgroup *pc);
>
> static inline int PageCgroupUsed(struct page_cgroup *pc)
> {
> - return test_bit(PCG_USED, &pc->flags);
> + return !!(pc->flags & PCG_USED);
> }
> #else /* !CONFIG_MEMCG */
> struct page_cgroup;
> --
> 1.7.10.4
>
--
Michal Hocko
SUSE Labs
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^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH -mm 1/3] page-cgroup: trivial cleanup
2014-06-24 16:33 [PATCH -mm 1/3] page-cgroup: trivial cleanup Vladimir Davydov
2014-06-24 16:33 ` [PATCH -mm 2/3] page-cgroup: get rid of NR_PCG_FLAGS Vladimir Davydov
2014-06-24 16:33 ` [PATCH -mm 3/3] page-cgroup: fix flags definition Vladimir Davydov
@ 2014-06-25 4:01 ` Johannes Weiner
2014-06-25 6:52 ` Michal Hocko
3 siblings, 0 replies; 10+ messages in thread
From: Johannes Weiner @ 2014-06-25 4:01 UTC (permalink / raw)
To: Vladimir Davydov; +Cc: akpm, mhocko, linux-kernel, linux-mm
On Tue, Jun 24, 2014 at 08:33:04PM +0400, Vladimir Davydov wrote:
> Add forward declarations for struct pglist_data, mem_cgroup.
>
> Remove __init, __meminit from function prototypes and inline functions.
>
> Remove redundant inclusion of bit_spinlock.h.
>
> Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
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^ permalink raw reply [flat|nested] 10+ messages in thread
* Re: [PATCH -mm 1/3] page-cgroup: trivial cleanup
2014-06-24 16:33 [PATCH -mm 1/3] page-cgroup: trivial cleanup Vladimir Davydov
` (2 preceding siblings ...)
2014-06-25 4:01 ` [PATCH -mm 1/3] page-cgroup: trivial cleanup Johannes Weiner
@ 2014-06-25 6:52 ` Michal Hocko
3 siblings, 0 replies; 10+ messages in thread
From: Michal Hocko @ 2014-06-25 6:52 UTC (permalink / raw)
To: Vladimir Davydov; +Cc: akpm, hannes, linux-kernel, linux-mm
On Tue 24-06-14 20:33:04, Vladimir Davydov wrote:
> Add forward declarations for struct pglist_data, mem_cgroup.
>
> Remove __init, __meminit from function prototypes and inline functions.
>
> Remove redundant inclusion of bit_spinlock.h.
>
> Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
> ---
> include/linux/page_cgroup.h | 22 +++++++++++-----------
> 1 file changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/include/linux/page_cgroup.h b/include/linux/page_cgroup.h
> index 97b5c39a31c8..23863edb95ff 100644
> --- a/include/linux/page_cgroup.h
> +++ b/include/linux/page_cgroup.h
> @@ -12,8 +12,10 @@ enum {
> #ifndef __GENERATING_BOUNDS_H
> #include <generated/bounds.h>
>
> +struct pglist_data;
> +
> #ifdef CONFIG_MEMCG
> -#include <linux/bit_spinlock.h>
> +struct mem_cgroup;
>
> /*
> * Page Cgroup can be considered as an extended mem_map.
> @@ -27,16 +29,16 @@ struct page_cgroup {
> struct mem_cgroup *mem_cgroup;
> };
>
> -void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat);
> +extern void pgdat_page_cgroup_init(struct pglist_data *pgdat);
>
> #ifdef CONFIG_SPARSEMEM
> -static inline void __init page_cgroup_init_flatmem(void)
> +static inline void page_cgroup_init_flatmem(void)
> {
> }
> -extern void __init page_cgroup_init(void);
> +extern void page_cgroup_init(void);
> #else
> -void __init page_cgroup_init_flatmem(void);
> -static inline void __init page_cgroup_init(void)
> +extern void page_cgroup_init_flatmem(void);
> +static inline void page_cgroup_init(void)
> {
> }
> #endif
> @@ -48,11 +50,10 @@ static inline int PageCgroupUsed(struct page_cgroup *pc)
> {
> return test_bit(PCG_USED, &pc->flags);
> }
> -
> -#else /* CONFIG_MEMCG */
> +#else /* !CONFIG_MEMCG */
> struct page_cgroup;
>
> -static inline void __meminit pgdat_page_cgroup_init(struct pglist_data *pgdat)
> +static inline void pgdat_page_cgroup_init(struct pglist_data *pgdat)
> {
> }
>
> @@ -65,10 +66,9 @@ static inline void page_cgroup_init(void)
> {
> }
>
> -static inline void __init page_cgroup_init_flatmem(void)
> +static inline void page_cgroup_init_flatmem(void)
> {
> }
> -
> #endif /* CONFIG_MEMCG */
>
> #include <linux/swap.h>
> --
> 1.7.10.4
>
--
Michal Hocko
SUSE Labs
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^ permalink raw reply [flat|nested] 10+ messages in thread