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alloc_tag: add accuracy based filtering to ioctl

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Extend the allocinfo filtering mechanism to allow users to filter tags
based on their accuracy.

[abhishekbapat@google.com: move `inaccurate` filtering criteria from `struct allocinfo_tag` to `struct allocinfo_filter`]
  Link: https://lore.kernel.org/e4e49ec4a5960292aeeb9e196526c18dc95228a2.1785867739.git.abhishekbapat@google.com
Link: https://lore.kernel.org/396a5e4bc3b2990223ab355f2cd3ceb6aa15499e.1783532853.git.abhishekbapat@google.com
Signed-off-by: Abhishek Bapat <abhishekbapat@google.com>
Acked-by: Hao Ge <hao.ge@linux.dev>
Acked-by: Suren Baghdasaryan <surenb@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Sourav Panda <souravpanda@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Abhishek Bapat
2026-08-24 18:43:13 -07:00
committed by Andrew Morton
parent 6f6769ea88
commit 33588e0b81
2 changed files with 12 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/uapi/linux/alloc_tag.h
+4
View File
@@ -50,6 +50,7 @@ enum {
ALLOCINFO_FILTER_FUNCTION,
ALLOCINFO_FILTER_FILENAME,
ALLOCINFO_FILTER_LINENO,
ALLOCINFO_FILTER_INACCURATE,
ALLOCINFO_FILTER_MIN_SIZE,
ALLOCINFO_FILTER_MAX_SIZE,
__ALLOCINFO_FILTER_LAST = ALLOCINFO_FILTER_MAX_SIZE
@@ -59,6 +60,7 @@ enum {
#define ALLOCINFO_FILTER_MASK_FUNCTION (1 << ALLOCINFO_FILTER_FUNCTION)
#define ALLOCINFO_FILTER_MASK_FILENAME (1 << ALLOCINFO_FILTER_FILENAME)
#define ALLOCINFO_FILTER_MASK_LINENO (1 << ALLOCINFO_FILTER_LINENO)
#define ALLOCINFO_FILTER_MASK_INACCURATE (1 << ALLOCINFO_FILTER_INACCURATE)
#define ALLOCINFO_FILTER_MASK_MIN_SIZE (1 << ALLOCINFO_FILTER_MIN_SIZE)
#define ALLOCINFO_FILTER_MASK_MAX_SIZE (1 << ALLOCINFO_FILTER_MAX_SIZE)
@@ -70,6 +72,8 @@ struct allocinfo_filter {
struct allocinfo_tag fields;
__u64 min_size;
__u64 max_size;
/* filter criteria only; see allocinfo_counter.accurate for actual accuracy */
__u64 inaccurate;
};
struct allocinfo_get_at {
mm/alloc_tag.c
+8
View File
@@ -262,6 +262,8 @@ static bool matches_filter(struct codetag *ct, struct allocinfo_filter *filter,
struct alloc_tag_counters *counters,
bool *fetched_counters)
{
bool inaccurate;
if (!filter || !filter->mask)
return true;
@@ -287,6 +289,12 @@ static bool matches_filter(struct codetag *ct, struct allocinfo_filter *filter,
ct->lineno != filter->fields.lineno)
return false;
if (filter->mask & ALLOCINFO_FILTER_MASK_INACCURATE) {
inaccurate = !!(ct->flags & CODETAG_FLAG_INACCURATE);
if (inaccurate != !!(filter->inaccurate))
return false;
}
if (filter->mask & (ALLOCINFO_FILTER_MASK_MIN_SIZE | ALLOCINFO_FILTER_MASK_MAX_SIZE)) {
if (!*fetched_counters) {
*counters = allocinfo_prefetch_counters(ct);