Staging
v0.5.2
v0.5.2
https://github.com/torvalds/linux
Tip revision: a71c9a1c779f2499fb2afc0553e543f18aff6edf authored by Linus Torvalds on 03 April 2017, 00:23:54 UTC
Linux 4.11-rc5
Linux 4.11-rc5
Tip revision: a71c9a1
mm_types_task.h
#ifndef _LINUX_MM_TYPES_TASK_H
#define _LINUX_MM_TYPES_TASK_H
/*
* Here are the definitions of the MM data types that are embedded in 'struct task_struct'.
*
* (These are defined separately to decouple sched.h from mm_types.h as much as possible.)
*/
#include <linux/types.h>
#include <linux/threads.h>
#include <linux/atomic.h>
#include <linux/cpumask.h>
#include <asm/page.h>
#define USE_SPLIT_PTE_PTLOCKS (NR_CPUS >= CONFIG_SPLIT_PTLOCK_CPUS)
#define USE_SPLIT_PMD_PTLOCKS (USE_SPLIT_PTE_PTLOCKS && \
IS_ENABLED(CONFIG_ARCH_ENABLE_SPLIT_PMD_PTLOCK))
#define ALLOC_SPLIT_PTLOCKS (SPINLOCK_SIZE > BITS_PER_LONG/8)
/*
* The per task VMA cache array:
*/
#define VMACACHE_BITS 2
#define VMACACHE_SIZE (1U << VMACACHE_BITS)
#define VMACACHE_MASK (VMACACHE_SIZE - 1)
struct vmacache {
u32 seqnum;
struct vm_area_struct *vmas[VMACACHE_SIZE];
};
enum {
MM_FILEPAGES, /* Resident file mapping pages */
MM_ANONPAGES, /* Resident anonymous pages */
MM_SWAPENTS, /* Anonymous swap entries */
MM_SHMEMPAGES, /* Resident shared memory pages */
NR_MM_COUNTERS
};
#if USE_SPLIT_PTE_PTLOCKS && defined(CONFIG_MMU)
#define SPLIT_RSS_COUNTING
/* per-thread cached information, */
struct task_rss_stat {
int events; /* for synchronization threshold */
int count[NR_MM_COUNTERS];
};
#endif /* USE_SPLIT_PTE_PTLOCKS */
struct mm_rss_stat {
atomic_long_t count[NR_MM_COUNTERS];
};
struct page_frag {
struct page *page;
#if (BITS_PER_LONG > 32) || (PAGE_SIZE >= 65536)
__u32 offset;
__u32 size;
#else
__u16 offset;
__u16 size;
#endif
};
/* Track pages that require TLB flushes */
struct tlbflush_unmap_batch {
#ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH
/*
* Each bit set is a CPU that potentially has a TLB entry for one of
* the PFNs being flushed. See set_tlb_ubc_flush_pending().
*/
struct cpumask cpumask;
/* True if any bit in cpumask is set */
bool flush_required;
/*
* If true then the PTE was dirty when unmapped. The entry must be
* flushed before IO is initiated or a stale TLB entry potentially
* allows an update without redirtying the page.
*/
bool writable;
#endif
};
#endif /* _LINUX_MM_TYPES_TASK_H */