252 строки
5.3 KiB
C
252 строки
5.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#undef TRACE_SYSTEM
|
|
#define TRACE_SYSTEM ksm
|
|
|
|
#if !defined(_TRACE_KSM_H) || defined(TRACE_HEADER_MULTI_READ)
|
|
#define _TRACE_KSM_H
|
|
|
|
#include <linux/tracepoint.h>
|
|
|
|
/**
|
|
* ksm_scan_template - called for start / stop scan
|
|
*
|
|
* @seq: sequence number of scan
|
|
* @rmap_entries: actual number of rmap entries
|
|
*
|
|
* Allows to trace the start / stop of a ksm scan.
|
|
*/
|
|
DECLARE_EVENT_CLASS(ksm_scan_template,
|
|
|
|
TP_PROTO(int seq, u32 rmap_entries),
|
|
|
|
TP_ARGS(seq, rmap_entries),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(int, seq)
|
|
__field(u32, rmap_entries)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->seq = seq;
|
|
__entry->rmap_entries = rmap_entries;
|
|
),
|
|
|
|
TP_printk("seq %d rmap size %d",
|
|
__entry->seq, __entry->rmap_entries)
|
|
);
|
|
|
|
/**
|
|
* ksm_start_scan - called after a new ksm scan is started
|
|
*
|
|
* @seq: sequence number of scan
|
|
* @rmap_entries: actual number of rmap entries
|
|
*
|
|
* Allows to trace the start of a ksm scan.
|
|
*/
|
|
DEFINE_EVENT(ksm_scan_template, ksm_start_scan,
|
|
|
|
TP_PROTO(int seq, u32 rmap_entries),
|
|
|
|
TP_ARGS(seq, rmap_entries)
|
|
);
|
|
|
|
/**
|
|
* ksm_stop_scan - called after a new ksm scan has completed
|
|
*
|
|
* @seq: sequence number of scan
|
|
* @rmap_entries: actual number of rmap entries
|
|
*
|
|
* Allows to trace the completion of a ksm scan.
|
|
*/
|
|
DEFINE_EVENT(ksm_scan_template, ksm_stop_scan,
|
|
|
|
TP_PROTO(int seq, u32 rmap_entries),
|
|
|
|
TP_ARGS(seq, rmap_entries)
|
|
);
|
|
|
|
/**
|
|
* ksm_enter - called after a new process has been added / removed from ksm
|
|
*
|
|
* @mm: address of the mm object of the process
|
|
*
|
|
* Allows to trace the when a process has been added or removed from ksm.
|
|
*/
|
|
DECLARE_EVENT_CLASS(ksm_enter_exit_template,
|
|
|
|
TP_PROTO(void *mm),
|
|
|
|
TP_ARGS(mm),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(void *, mm)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->mm = mm;
|
|
),
|
|
|
|
TP_printk("mm %p", __entry->mm)
|
|
);
|
|
|
|
/**
|
|
* ksm_enter - called after a new process has been added to ksm
|
|
*
|
|
* @mm: address of the mm object of the process
|
|
*
|
|
* Allows to trace the when a process has been added to ksm.
|
|
*/
|
|
DEFINE_EVENT(ksm_enter_exit_template, ksm_enter,
|
|
|
|
TP_PROTO(void *mm),
|
|
|
|
TP_ARGS(mm)
|
|
);
|
|
|
|
/**
|
|
* ksm_exit - called after a new process has been removed from ksm
|
|
*
|
|
* @mm: address of the mm object of the process
|
|
*
|
|
* Allows to trace the when a process has been removed from ksm.
|
|
*/
|
|
DEFINE_EVENT(ksm_enter_exit_template, ksm_exit,
|
|
|
|
TP_PROTO(void *mm),
|
|
|
|
TP_ARGS(mm)
|
|
);
|
|
|
|
/**
|
|
* ksm_merge_one_page - called after a page has been merged
|
|
*
|
|
* @pfn: page frame number of ksm page
|
|
* @rmap_item: address of rmap_item object
|
|
* @mm: address of the process mm struct
|
|
* @err: success
|
|
*
|
|
* Allows to trace the ksm merging of individual pages.
|
|
*/
|
|
TRACE_EVENT(ksm_merge_one_page,
|
|
|
|
TP_PROTO(unsigned long pfn, void *rmap_item, void *mm, int err),
|
|
|
|
TP_ARGS(pfn, rmap_item, mm, err),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(unsigned long, pfn)
|
|
__field(void *, rmap_item)
|
|
__field(void *, mm)
|
|
__field(int, err)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pfn = pfn;
|
|
__entry->rmap_item = rmap_item;
|
|
__entry->mm = mm;
|
|
__entry->err = err;
|
|
),
|
|
|
|
TP_printk("ksm pfn %lu rmap_item %p mm %p error %d",
|
|
__entry->pfn, __entry->rmap_item, __entry->mm, __entry->err)
|
|
);
|
|
|
|
/**
|
|
* ksm_merge_with_ksm_page - called after a page has been merged with a ksm page
|
|
*
|
|
* @ksm_page: address ksm page
|
|
* @pfn: page frame number of ksm page
|
|
* @rmap_item: address of rmap_item object
|
|
* @mm: address of the mm object of the process
|
|
* @err: success
|
|
*
|
|
* Allows to trace the merging of a page with a ksm page.
|
|
*/
|
|
TRACE_EVENT(ksm_merge_with_ksm_page,
|
|
|
|
TP_PROTO(void *ksm_page, unsigned long pfn, void *rmap_item, void *mm, int err),
|
|
|
|
TP_ARGS(ksm_page, pfn, rmap_item, mm, err),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(void *, ksm_page)
|
|
__field(unsigned long, pfn)
|
|
__field(void *, rmap_item)
|
|
__field(void *, mm)
|
|
__field(int, err)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->ksm_page = ksm_page;
|
|
__entry->pfn = pfn;
|
|
__entry->rmap_item = rmap_item;
|
|
__entry->mm = mm;
|
|
__entry->err = err;
|
|
),
|
|
|
|
TP_printk("%spfn %lu rmap_item %p mm %p error %d",
|
|
(__entry->ksm_page ? "ksm " : ""),
|
|
__entry->pfn, __entry->rmap_item, __entry->mm, __entry->err)
|
|
);
|
|
|
|
/**
|
|
* ksm_remove_ksm_page - called after a ksm page has been removed
|
|
*
|
|
* @pfn: page frame number of ksm page
|
|
*
|
|
* Allows to trace the removing of stable ksm pages.
|
|
*/
|
|
TRACE_EVENT(ksm_remove_ksm_page,
|
|
|
|
TP_PROTO(unsigned long pfn),
|
|
|
|
TP_ARGS(pfn),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(unsigned long, pfn)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pfn = pfn;
|
|
),
|
|
|
|
TP_printk("pfn %lu", __entry->pfn)
|
|
);
|
|
|
|
/**
|
|
* ksm_remove_rmap_item - called after a rmap_item has been removed from the
|
|
* stable tree
|
|
*
|
|
* @pfn: page frame number of ksm page
|
|
* @rmap_item: address of rmap_item object
|
|
* @mm: address of the process mm struct
|
|
*
|
|
* Allows to trace the removal of pages from the stable tree list.
|
|
*/
|
|
TRACE_EVENT(ksm_remove_rmap_item,
|
|
|
|
TP_PROTO(unsigned long pfn, void *rmap_item, void *mm),
|
|
|
|
TP_ARGS(pfn, rmap_item, mm),
|
|
|
|
TP_STRUCT__entry(
|
|
__field(unsigned long, pfn)
|
|
__field(void *, rmap_item)
|
|
__field(void *, mm)
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->pfn = pfn;
|
|
__entry->rmap_item = rmap_item;
|
|
__entry->mm = mm;
|
|
),
|
|
|
|
TP_printk("pfn %lu rmap_item %p mm %p",
|
|
__entry->pfn, __entry->rmap_item, __entry->mm)
|
|
);
|
|
|
|
#endif /* _TRACE_KSM_H */
|
|
|
|
/* This part must be outside protection */
|
|
#include <trace/define_trace.h>
|