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libbb: shrink recursive_action() by reducing memory pressure

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function                                             old     new   delta
recursive_action1                                      -     316    +316
file_action_grep                                     161     164      +3
add_to_prg_cache_if_socket                           202     205      +3
depmod_main                                          509     511      +2
writeFileToTarball                                   488     489      +1
parse_module                                         281     282      +1
fileAction                                           207     208      +1
act                                                  189     190      +1
add_to_dirlist                                        65      64      -1
writeTarFile                                         196     194      -2
uuidcache_init                                        47      45      -2
uuidcache_check_device                               109     107      -2
true_action                                            8       6      -2
run_parts_main                                       310     308      -2
netstat_main                                         534     532      -2
lsusb_main                                            29      27      -2
lspci_main                                            45      43      -2
initial_scan                                         138     136      -2
grep_main                                            845     843      -2
find_main                                            482     480      -2
config_file_action                                   437     435      -2
chmod_main                                           142     140      -2
dirAction                                             14      10      -4
diff_main                                           1544    1540      -4
chown_main                                           154     148      -6
skip_dir                                             136     129      -7
dir_act                                              191     184      -7
recursive_action                                     453      69    -384
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 7/20 up/down: 328/-439)        Total: -111 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2020-10-01 21:52:16 +02:00
parent 3c3928fc65
commit 689d0650ab
19 changed files with 159 additions and 150 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
util-linux/volume_id/get_devname.c
View File

@@ -102,10 +102,9 @@ uuidcache_addentry(char *device, /*int major, int minor,*/ char *label, char *uu
* add a cache entry for this device.
* If device node does not exist, it will be temporarily created. */
static int FAST_FUNC
uuidcache_check_device(const char *device,
struct stat *statbuf,
void *userData UNUSED_PARAM,
int depth UNUSED_PARAM)
uuidcache_check_device(struct recursive_state *state UNUSED_PARAM,
const char *device,
struct stat *statbuf)
{
/* note: this check rejects links to devices, among other nodes */
if (!S_ISBLK(statbuf->st_mode)
@@ -145,12 +144,13 @@ uuidcache_init(int scan_devices)
* This is unacceptably complex. Let's just scan /dev.
* (Maybe add scanning of /sys/block/XXX/dev for devices
* somehow not having their /dev/XXX entries created?) */
if (scan_devices)
if (scan_devices) {
recursive_action("/dev", ACTION_RECURSE,
uuidcache_check_device, /* file_action */
NULL, /* dir_action */
NULL, /* userData */
0 /* depth */);
NULL /* userData */
);
}
return uuidCache;
}