* [PATCH 1/2] rmap: Staticize page_referenced_file and page_referenced_anon
@ 2012-02-17 14:27 Kautuk Consul
2012-02-17 15:15 ` Peter Zijlstra
0 siblings, 1 reply; 5+ messages in thread
From: Kautuk Consul @ 2012-02-17 14:27 UTC (permalink / raw)
To: Andrew Morton, Peter Zijlstra, Hugh Dickins, KAMEZAWA Hiroyuki,
Mel Gorman
Cc: linux-mm, linux-kernel, Kautuk Consul
Staticize the page_referenced_anon and page_referenced_file
functions.
These functions are called only from page_referenced.
Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com>
---
mm/rmap.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/mm/rmap.c b/mm/rmap.c
index c8454e0..74aff97 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -772,7 +772,7 @@ out:
return referenced;
}
-static int page_referenced_anon(struct page *page,
+static inline int page_referenced_anon(struct page *page,
struct mem_cgroup *memcg,
unsigned long *vm_flags)
{
@@ -821,7 +821,7 @@ static int page_referenced_anon(struct page *page,
*
* This function is only called from page_referenced for object-based pages.
*/
-static int page_referenced_file(struct page *page,
+static inline int page_referenced_file(struct page *page,
struct mem_cgroup *memcg,
unsigned long *vm_flags)
{
--
1.7.5.4
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^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] rmap: Staticize page_referenced_file and page_referenced_anon
2012-02-17 14:27 [PATCH 1/2] rmap: Staticize page_referenced_file and page_referenced_anon Kautuk Consul
@ 2012-02-17 15:15 ` Peter Zijlstra
2012-02-17 15:19 ` Kautuk Consul
0 siblings, 1 reply; 5+ messages in thread
From: Peter Zijlstra @ 2012-02-17 15:15 UTC (permalink / raw)
To: Kautuk Consul
Cc: Andrew Morton, Hugh Dickins, KAMEZAWA Hiroyuki, Mel Gorman,
linux-mm, linux-kernel
On Fri, 2012-02-17 at 09:27 -0500, Kautuk Consul wrote:
> Staticize the page_referenced_anon and page_referenced_file
> functions.
> These functions are called only from page_referenced.
Subject and changelog say: staticize, which I read to mean: make static.
Yet what the patch does is make them inline ?!?
Also, if they're static and there's only a single callsite, gcc will
already inline them, does this patch really make a difference?
> -static int page_referenced_anon(struct page *page,
> +static inline int page_referenced_anon(struct page *page,
--
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] rmap: Staticize page_referenced_file and page_referenced_anon
2012-02-17 15:15 ` Peter Zijlstra
@ 2012-02-17 15:19 ` Kautuk Consul
2012-02-17 15:27 ` Kautuk Consul
2012-02-17 18:07 ` Peter Zijlstra
0 siblings, 2 replies; 5+ messages in thread
From: Kautuk Consul @ 2012-02-17 15:19 UTC (permalink / raw)
To: Peter Zijlstra
Cc: Andrew Morton, Hugh Dickins, KAMEZAWA Hiroyuki, Mel Gorman,
linux-mm, linux-kernel
On Fri, Feb 17, 2012 at 10:15 AM, Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> On Fri, 2012-02-17 at 09:27 -0500, Kautuk Consul wrote:
>> Staticize the page_referenced_anon and page_referenced_file
>> functions.
>> These functions are called only from page_referenced.
>
> Subject and changelog say: staticize, which I read to mean: make static.
> Yet what the patch does is make them inline ?!?
Yes, sorry my mistake. :)
>
> Also, if they're static and there's only a single callsite, gcc will
> already inline them, does this patch really make a difference?
I just sent this patch for what I thought was "correctness", but I guess
we can let this be if you are absolutely sure that all GCC cross compilers
for all platforms will guarantee inlining.
>
>> -static int page_referenced_anon(struct page *page,
>> +static inline int page_referenced_anon(struct page *page,
>
>
Please reply back if you feel I should resend this patch with modified
description.
Else, I'll just forget about this one. :)
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] rmap: Staticize page_referenced_file and page_referenced_anon
2012-02-17 15:19 ` Kautuk Consul
@ 2012-02-17 15:27 ` Kautuk Consul
2012-02-17 18:07 ` Peter Zijlstra
1 sibling, 0 replies; 5+ messages in thread
From: Kautuk Consul @ 2012-02-17 15:27 UTC (permalink / raw)
To: Peter Zijlstra
Cc: Andrew Morton, Hugh Dickins, KAMEZAWA Hiroyuki, Mel Gorman,
linux-mm, linux-kernel
Okay, I sent v2 of this anyway with the correct description.
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] rmap: Staticize page_referenced_file and page_referenced_anon
2012-02-17 15:19 ` Kautuk Consul
2012-02-17 15:27 ` Kautuk Consul
@ 2012-02-17 18:07 ` Peter Zijlstra
1 sibling, 0 replies; 5+ messages in thread
From: Peter Zijlstra @ 2012-02-17 18:07 UTC (permalink / raw)
To: Kautuk Consul
Cc: Andrew Morton, Hugh Dickins, KAMEZAWA Hiroyuki, Mel Gorman,
linux-mm, linux-kernel
On Fri, 2012-02-17 at 10:19 -0500, Kautuk Consul wrote:
> > Also, if they're static and there's only a single callsite, gcc will
> > already inline them, does this patch really make a difference?
>
> I just sent this patch for what I thought was "correctness", but I guess
> we can let this be if you are absolutely sure that all GCC cross compilers
> for all platforms will guarantee inlining.
Typically we don't explicitly inline such large functions, unless we
need it for performance.
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^ permalink raw reply [flat|nested] 5+ messages in thread
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2012-02-17 14:27 [PATCH 1/2] rmap: Staticize page_referenced_file and page_referenced_anon Kautuk Consul
2012-02-17 15:15 ` Peter Zijlstra
2012-02-17 15:19 ` Kautuk Consul
2012-02-17 15:27 ` Kautuk Consul
2012-02-17 18:07 ` Peter Zijlstra
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