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Move scan work buffers off the stack into reusable scanner workspace

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This commit is contained in:
Roman Tarasov committed 2026-03-23 23:35:49 +03:00
1 parent 7759b83293
commit 43d61dce37
2 files changed
+15 -11
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src/sm_scan.c
+12 -7
View File
@@ -18,6 +18,14 @@
#include "sm_image_cache.h"
#include "sm_image.h"
typedef struct {
char discovered_param_roots[MAX_PENDING][MAX_PATH];
} scan_workspace_t;
// Reuse the largest transient scan buffer instead of placing ~512 KiB of path
// state on the stack each cycle.
static scan_workspace_t g_scan_workspace;
static bool is_under_discovered_param_root(
const char *path, char discovered_param_roots[][MAX_PATH],
int discovered_count) {
@@ -449,9 +457,7 @@ int collect_scan_candidates_for_scan_root(const char *scan_root,
int candidate_count = 0;
const struct AppDbTitleList *app_db_titles = NULL;
bool app_db_titles_ready = get_app_db_title_list_cached(&app_db_titles);
char discovered_param_roots[MAX_PENDING][MAX_PATH];
int discovered_param_root_count = 0;
memset(discovered_param_roots, 0, sizeof(discovered_param_roots));
if (!app_db_titles_ready)
log_debug(" [DB] app.db title list unavailable for this scan cycle");
@@ -459,7 +465,7 @@ int collect_scan_candidates_for_scan_root(const char *scan_root,
collect_scan_candidates_from_root(scan_root, candidates, max_candidates,
&candidate_count, app_db_titles,
app_db_titles_ready,
discovered_param_roots,
g_scan_workspace.discovered_param_roots,
&discovered_param_root_count,
unstable_found_out);
@@ -474,9 +480,7 @@ int collect_scan_candidates(scan_candidate_t *candidates, int max_candidates,
int candidate_count = 0;
const struct AppDbTitleList *app_db_titles = NULL;
bool app_db_titles_ready = get_app_db_title_list_cached(&app_db_titles);
char discovered_param_roots[MAX_PENDING][MAX_PATH];
int discovered_param_root_count = 0;
memset(discovered_param_roots, 0, sizeof(discovered_param_roots));
if (!app_db_titles_ready)
log_debug(" [DB] app.db title list unavailable for this scan cycle");
@@ -485,9 +489,10 @@ int collect_scan_candidates(scan_candidate_t *candidates, int max_candidates,
if (should_stop_requested())
break;
collect_scan_candidates_from_root(get_scan_path(i), candidates,
max_candidates, &candidate_count,
max_candidates,
&candidate_count,
app_db_titles, app_db_titles_ready,
discovered_param_roots,
g_scan_workspace.discovered_param_roots,
&discovered_param_root_count,
unstable_found_out);
}
src/sm_scanner.c
+3 -4
View File
@@ -59,6 +59,7 @@ static int g_scanner_wake_pipe[2] = {-1, -1};
static int g_scanner_control_dir_fd = -1;
static int g_scanner_config_fd = -1;
static volatile sig_atomic_t g_scanner_wake_write_fd = -1;
static scan_candidate_t g_scanner_scan_candidates[MAX_PENDING];
static scanner_watch_entry_t *g_scanner_watch_entries = NULL;
static size_t g_scanner_watch_count = 0;
static size_t g_scanner_watch_capacity = 0;
@@ -782,8 +783,7 @@ static void apply_runtime_config_reload_effects(const runtime_config_t *old_cfg,
static bool run_full_scan_cycle(bool startup_sync, const char *reason,
bool *unstable_found_out) {
scan_candidate_t candidates[MAX_PENDING];
memset(candidates, 0, sizeof(candidates));
scan_candidate_t *candidates = g_scanner_scan_candidates;
log_immediate_scan_reason(reason);
@@ -825,8 +825,7 @@ static bool run_full_scan_cycle(bool startup_sync, const char *reason,
static bool run_targeted_scan_cycle(int scan_root_index,
bool *unstable_found_out) {
const char *scan_root = get_scan_path(scan_root_index);
scan_candidate_t candidates[MAX_PENDING];
memset(candidates, 0, sizeof(candidates));
scan_candidate_t *candidates = g_scanner_scan_candidates;
log_debug("[SCAN] running targeted scan for %s", scan_root);