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mm/vmacache, sched/headers: Introduce 'struct vmacache' and move it from <linux/sched.h> to <linux/mm_types>

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The <linux/sched.h> header includes various vmacache related defines,
which are arguably misplaced.

Move them to mm_types.h and minimize the sched.h impact by putting
all task vmacache state into a new 'struct vmacache' structure.

No change in functionality.

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
2017-02-03 11:03:31 +01:00
parent 780de9dd27
commit 314ff7851f
6 changed files with 25 additions and 16 deletions
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11
include/linux/sched.h
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@@ -134,10 +134,6 @@ struct blk_plug;
struct filename;
struct nameidata;
#define VMACACHE_BITS 2
#define VMACACHE_SIZE (1U << VMACACHE_BITS)
#define VMACACHE_MASK (VMACACHE_SIZE - 1)
/*
* These are the constant used to fake the fixed-point load-average
* counting. Some notes:
@@ -1550,9 +1546,10 @@ struct task_struct {
#endif
struct mm_struct *mm, *active_mm;
/* per-thread vma caching */
u32 vmacache_seqnum;
struct vm_area_struct *vmacache[VMACACHE_SIZE];
/* Per-thread vma caching: */
struct vmacache vmacache;
#if defined(SPLIT_RSS_COUNTING)
struct task_rss_stat rss_stat;
#endif