From 5de52e34f09d64d93a2c22af23f09b58cc214c6e Mon Sep 17 00:00:00 2001 From: Zdenek Kabelac Date: Tue, 30 Mar 2010 14:41:58 +0000 Subject: [PATCH] Count only readable size for memlock stats. As we mlock() only readable pages, makes statistics only for readable bytes. --- lib/mm/memlock.c | 37 ++++++++++++------------------------- 1 file changed, 12 insertions(+), 25 deletions(-) diff --git a/lib/mm/memlock.c b/lib/mm/memlock.c index f857bc2ef..1c6bda470 100644 --- a/lib/mm/memlock.c +++ b/lib/mm/memlock.c @@ -80,12 +80,7 @@ static FILE *_mapsh; static char _procselfmaps[PATH_MAX] = ""; #define SELF_MAPS "/self/maps" -struct maps_stats { - size_t r_size; - size_t w_size; - size_t x_size; -}; -static struct maps_stats _mstats; /* statistic for maps locking */ +static size_t _mstats; /* statistic for maps locking */ static void _touch_memory(void *mem, size_t size) { @@ -125,7 +120,7 @@ static void _release_memory(void) * format described in kernel/Documentation/filesystem/proc.txt */ static int _maps_line(struct cmd_context *cmd, lvmlock_t lock, - const char* line, struct maps_stats* mstats) + const char* line, size_t* mstats) { const struct config_node *cn; struct config_value *cv; @@ -175,13 +170,7 @@ static int _maps_line(struct cmd_context *cmd, lvmlock_t lock, } } - if (fr == 'r') - mstats->r_size += sz; - if (fw == 'w') - mstats->w_size += sz; - if (fx == 'x') - mstats->x_size += sz; - + *mstats += sz; log_debug("%s %10ldKiB %12lx - %12lx %c%c%c%c %s", (lock == LVM_MLOCK) ? "mlock" : "munlock", ((long)sz + 1023) / 1024, from, to, fr, fw, fx, fp, line + pos); @@ -201,7 +190,7 @@ static int _maps_line(struct cmd_context *cmd, lvmlock_t lock, return 1; } -static int _memlock_maps(struct cmd_context *cmd, lvmlock_t lock, struct maps_stats *mstats) +static int _memlock_maps(struct cmd_context *cmd, lvmlock_t lock, size_t *mstats) { char *line = NULL; size_t len; @@ -228,19 +217,18 @@ static int _memlock_maps(struct cmd_context *cmd, lvmlock_t lock, struct maps_st } /* Reset statistic counters */ - memset(mstats, 0, sizeof(*mstats)); + *mstats = 0; rewind(_mapsh); while ((n = getline(&line, &len, _mapsh)) != -1) { line[n > 0 ? n - 1 : 0] = '\0'; /* remove \n */ - if (!(ret = _maps_line(cmd, lock, line, mstats))) - break; + if (!_maps_line(cmd, lock, line, mstats)) + ret = 0; } free(line); - log_debug("Mapped sizes: r=%ld, w=%ld, x=%ld", - (long)mstats->r_size, (long)mstats->w_size, (long)mstats->x_size); + log_debug("Mapped size: %ld", (long)*mstats); return ret; } @@ -288,7 +276,7 @@ static void _lock_mem(struct cmd_context *cmd) static void _unlock_mem(struct cmd_context *cmd) { - struct maps_stats unlock_mstats; + size_t unlock_mstats; log_very_verbose("Unlocking memory"); @@ -299,10 +287,9 @@ static void _unlock_mem(struct cmd_context *cmd) if (fclose(_mapsh)) log_sys_error("fclose", _procselfmaps); - if (_mstats.r_size < unlock_mstats.r_size) - log_error(INTERNAL_ERROR "Maps lock(%ld,%ld,%ld) < unlock(%ld,%ld,%ld)", - (long)_mstats.r_size, (long)_mstats.w_size, (long)_mstats.x_size, - (long)unlock_mstats.r_size, (long)unlock_mstats.w_size, (long)unlock_mstats.x_size); + if (_mstats < unlock_mstats) + log_error(INTERNAL_ERROR "Maps lock %ld < unlock %ld", + (long)_mstats, (long)unlock_mstats); } if (setpriority(PRIO_PROCESS, 0, _priority)) -- 2.43.5