diff options
| author | Zeng Chi <zengchi@kylinos.cn> | 2026-09-21 18:24:42 +0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-09-22 08:36:16 -0700 |
| commit | 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d (patch) | |
| tree | 660d50d4139cb750fbde1ae3432452c20726c99d /include/trace/events/mmap.h | |
| download | linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.tar.gz linux-stable-119e9db233ad0f4cbd4cfb9f9385a7bca378b37d.zip | |
KVM: Don't pre-reserve xarray entries when storing empty/NULL attributesgrafted
Skip the xarray reservation loop when clearing all memory attributes, as
storing NULL only erases the entry and never needs to allocate, so no
reservation (and no cleanup of a failed one) is required in that case.
Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'include/trace/events/mmap.h')
| -rw-r--r-- | include/trace/events/mmap.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/include/trace/events/mmap.h b/include/trace/events/mmap.h new file mode 100644 index 000000000..ee2843a5d --- /dev/null +++ b/include/trace/events/mmap.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM mmap + +#if !defined(_TRACE_MMAP_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_MMAP_H + +#include <linux/tracepoint.h> + +TRACE_EVENT(vm_unmapped_area, + + TP_PROTO(unsigned long addr, struct vm_unmapped_area_info *info), + + TP_ARGS(addr, info), + + TP_STRUCT__entry( + __field(unsigned long, addr) + __field(unsigned long, total_vm) + __field(unsigned long, flags) + __field(unsigned long, length) + __field(unsigned long, low_limit) + __field(unsigned long, high_limit) + __field(unsigned long, align_mask) + __field(unsigned long, align_offset) + ), + + TP_fast_assign( + __entry->addr = addr; + __entry->total_vm = current->mm->total_vm; + __entry->flags = info->flags; + __entry->length = info->length; + __entry->low_limit = info->low_limit; + __entry->high_limit = info->high_limit; + __entry->align_mask = info->align_mask; + __entry->align_offset = info->align_offset; + ), + + TP_printk("addr=0x%lx err=%ld total_vm=0x%lx flags=0x%lx len=0x%lx lo=0x%lx hi=0x%lx mask=0x%lx ofs=0x%lx", + IS_ERR_VALUE(__entry->addr) ? 0 : __entry->addr, + IS_ERR_VALUE(__entry->addr) ? __entry->addr : 0, + __entry->total_vm, __entry->flags, __entry->length, + __entry->low_limit, __entry->high_limit, __entry->align_mask, + __entry->align_offset) +); + +TRACE_EVENT(exit_mmap, + TP_PROTO(struct mm_struct *mm), + + TP_ARGS(mm), + + TP_STRUCT__entry( + __field(struct mm_struct *, mm) + __field(struct maple_tree *, mt) + ), + + TP_fast_assign( + __entry->mm = mm; + __entry->mt = &mm->mm_mt; + ), + + TP_printk("mt_mod %p, DESTROY", + __entry->mt + ) +); + +#endif + +/* This part must be outside protection */ +#include <trace/define_trace.h> |