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perf: use VMA iterator

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The VMA iterator is faster than the linked list and removing the linked
list will shrink the vm_area_struct.

Link: https://lkml.kernel.org/r/20220906194824.2110408-48-Liam.Howlett@oracle.com
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Tested-by: Yu Zhao <yuzhao@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-09-06 19:48:58 +00:00 committed by Andrew Morton
parent 160c820023
commit fcb72a585a
2 changed files with 8 additions and 4 deletions
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3
kernel/events/core.c
View File

@ -10229,8 +10229,9 @@ static void perf_addr_filter_apply(struct perf_addr_filter *filter,
struct perf_addr_filter_range *fr)
{
struct vm_area_struct *vma;
VMA_ITERATOR(vmi, mm, 0);
for (vma = mm->mmap; vma; vma = vma->vm_next) {
for_each_vma(vmi, vma) {
if (!vma->vm_file)
continue;

9
kernel/events/uprobes.c
View File

@ -349,9 +349,10 @@ static bool valid_ref_ctr_vma(struct uprobe *uprobe,
static struct vm_area_struct *
find_ref_ctr_vma(struct uprobe *uprobe, struct mm_struct *mm)
{
VMA_ITERATOR(vmi, mm, 0);
struct vm_area_struct *tmp;
for (tmp = mm->mmap; tmp; tmp = tmp->vm_next)
for_each_vma(vmi, tmp)
if (valid_ref_ctr_vma(uprobe, tmp))
return tmp;
@ -1231,11 +1232,12 @@ int uprobe_apply(struct inode *inode, loff_t offset,
static int unapply_uprobe(struct uprobe *uprobe, struct mm_struct *mm)
{
VMA_ITERATOR(vmi, mm, 0);
struct vm_area_struct *vma;
int err = 0;
mmap_read_lock(mm);
for (vma = mm->mmap; vma; vma = vma->vm_next) {
for_each_vma(vmi, vma) {
unsigned long vaddr;
loff_t offset;
@ -1983,9 +1985,10 @@ bool uprobe_deny_signal(void)
static void mmf_recalc_uprobes(struct mm_struct *mm)
{
VMA_ITERATOR(vmi, mm, 0);
struct vm_area_struct *vma;
for (vma = mm->mmap; vma; vma = vma->vm_next) {
for_each_vma(vmi, vma) {
if (!valid_vma(vma, false))
continue;
/*