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xen/trace: add ptpage alloc/release tracepoints

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Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
This commit is contained in:
Jeremy Fitzhardinge 2010-12-17 14:21:17 -08:00
parent 8470880791
commit c2ba050d2e
2 changed files with 41 additions and 2 deletions
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10
arch/x86/xen/mmu.c
View File

@ -1478,8 +1478,11 @@ static void __init xen_release_pmd_init(unsigned long pfn)
static void xen_alloc_ptpage(struct mm_struct *mm, unsigned long pfn, unsigned level) static void xen_alloc_ptpage(struct mm_struct *mm, unsigned long pfn, unsigned level)
{ {
struct page *page = pfn_to_page(pfn); struct page *page = pfn_to_page(pfn);
int pinned = PagePinned(virt_to_page(mm->pgd));
if (PagePinned(virt_to_page(mm->pgd))) { trace_xen_mmu_alloc_ptpage(mm, pfn, level, pinned);
if (pinned) {
SetPagePinned(page); SetPagePinned(page);
if (!PageHighMem(page)) { if (!PageHighMem(page)) {
@ -1508,8 +1511,11 @@ static void xen_alloc_pmd(struct mm_struct *mm, unsigned long pfn)
static void xen_release_ptpage(unsigned long pfn, unsigned level) static void xen_release_ptpage(unsigned long pfn, unsigned level)
{ {
struct page *page = pfn_to_page(pfn); struct page *page = pfn_to_page(pfn);
bool pinned = PagePinned(page);
if (PagePinned(page)) { trace_xen_mmu_release_ptpage(pfn, level, pinned);
if (pinned) {
if (!PageHighMem(page)) { if (!PageHighMem(page)) {
if (level == PT_PTE && USE_SPLIT_PTLOCKS) if (level == PT_PTE && USE_SPLIT_PTLOCKS)
pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, pfn); pin_pagetable_pfn(MMUEXT_UNPIN_TABLE, pfn);

33
include/trace/events/xen.h
View File

@ -347,6 +347,39 @@ TRACE_EVENT(xen_mmu_ptep_modify_prot_commit,
(int)sizeof(pteval_t) * 2, (unsigned long long)__entry->pteval) (int)sizeof(pteval_t) * 2, (unsigned long long)__entry->pteval)
); );
TRACE_EVENT(xen_mmu_alloc_ptpage,
TP_PROTO(struct mm_struct *mm, unsigned long pfn, unsigned level, bool pinned),
TP_ARGS(mm, pfn, level, pinned),
TP_STRUCT__entry(
__field(struct mm_struct *, mm)
__field(unsigned long, pfn)
__field(unsigned, level)
__field(bool, pinned)
),
TP_fast_assign(__entry->mm = mm;
__entry->pfn = pfn;
__entry->level = level;
__entry->pinned = pinned),
TP_printk("mm %p pfn %lx level %d %spinned",
__entry->mm, __entry->pfn, __entry->level,
__entry->pinned ? "" : "un")
);
TRACE_EVENT(xen_mmu_release_ptpage,
TP_PROTO(unsigned long pfn, unsigned level, bool pinned),
TP_ARGS(pfn, level, pinned),
TP_STRUCT__entry(
__field(unsigned long, pfn)
__field(unsigned, level)
__field(bool, pinned)
),
TP_fast_assign(__entry->pfn = pfn;
__entry->level = level;
__entry->pinned = pinned),
TP_printk("pfn %lx level %d %spinned",
__entry->pfn, __entry->level,
__entry->pinned ? "" : "un")
);
#endif /* _TRACE_XEN_H */ #endif /* _TRACE_XEN_H */