mirror of
https://github.com/torvalds/linux
synced 2024-07-09 04:38:56 +00:00
f58780a8e3
The macro PAGE_REPORTING_MIN_ORDER is defined as the page reporting threshold. It can't be adjusted at runtime. This introduces a variable (@page_reporting_order) to replace the marcro (PAGE_REPORTING_MIN_ORDER). MAX_ORDER is assigned to it initially, meaning the page reporting is disabled. It will be specified by driver if valid one is provided. Otherwise, it will fall back to @pageblock_order. It's also exported so that the page reporting order can be adjusted at runtime. Link: https://lkml.kernel.org/r/20210625014710.42954-3-gshan@redhat.com Signed-off-by: Gavin Shan <gshan@redhat.com> Suggested-by: David Hildenbrand <david@redhat.com> Reviewed-by: Alexander Duyck <alexanderduyck@fb.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _MM_PAGE_REPORTING_H
|
|
#define _MM_PAGE_REPORTING_H
|
|
|
|
#include <linux/mmzone.h>
|
|
#include <linux/pageblock-flags.h>
|
|
#include <linux/page-isolation.h>
|
|
#include <linux/jump_label.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/pgtable.h>
|
|
#include <linux/scatterlist.h>
|
|
|
|
#ifdef CONFIG_PAGE_REPORTING
|
|
DECLARE_STATIC_KEY_FALSE(page_reporting_enabled);
|
|
extern unsigned int page_reporting_order;
|
|
void __page_reporting_notify(void);
|
|
|
|
static inline bool page_reported(struct page *page)
|
|
{
|
|
return static_branch_unlikely(&page_reporting_enabled) &&
|
|
PageReported(page);
|
|
}
|
|
|
|
/**
|
|
* page_reporting_notify_free - Free page notification to start page processing
|
|
*
|
|
* This function is meant to act as a screener for __page_reporting_notify
|
|
* which will determine if a give zone has crossed over the high-water mark
|
|
* that will justify us beginning page treatment. If we have crossed that
|
|
* threshold then it will start the process of pulling some pages and
|
|
* placing them in the batch list for treatment.
|
|
*/
|
|
static inline void page_reporting_notify_free(unsigned int order)
|
|
{
|
|
/* Called from hot path in __free_one_page() */
|
|
if (!static_branch_unlikely(&page_reporting_enabled))
|
|
return;
|
|
|
|
/* Determine if we have crossed reporting threshold */
|
|
if (order < page_reporting_order)
|
|
return;
|
|
|
|
/* This will add a few cycles, but should be called infrequently */
|
|
__page_reporting_notify();
|
|
}
|
|
#else /* CONFIG_PAGE_REPORTING */
|
|
#define page_reported(_page) false
|
|
|
|
static inline void page_reporting_notify_free(unsigned int order)
|
|
{
|
|
}
|
|
#endif /* CONFIG_PAGE_REPORTING */
|
|
#endif /*_MM_PAGE_REPORTING_H */
|