Author: pluknet
Date: Wed Dec 25 17:11:49 2013
New Revision: 259878
URL: http://svnweb.freebsd.org/changeset/base/259878
Log:
For vmcore, calculate time relative to device creation upon time_uptime.
Previously it used a clock from live kernel.
MFC after: 2 weeks
Modified:
head/lib/libdevstat/devstat.c
Modified: head/lib/libdevstat/devstat.c
==============================================================================
--- head/lib/libdevstat/devstat.c Wed Dec 25 16:58:42 2013
(r259877)
+++ head/lib/libdevstat/devstat.c Wed Dec 25 17:11:49 2013
(r259878)
@@ -150,7 +150,9 @@ static const char *namelist[] = {
"_devstat_version",
#define X_DEVICE_STATQ 3
"_device_statq",
-#define X_END 4
+#define X_TIME_UPTIME 4
+ "_time_uptime",
+#define X_END 5
};
/*
@@ -349,10 +351,10 @@ devstat_getdevs(kvm_t *kd, struct statin
oldnumdevs = dinfo->numdevs;
oldgeneration = dinfo->generation;
- clock_gettime(CLOCK_MONOTONIC, &ts);
- stats->snap_time = ts.tv_sec + ts.tv_nsec * 1e-9;
-
if (kd == NULL) {
+ clock_gettime(CLOCK_MONOTONIC, &ts);
+ stats->snap_time = ts.tv_sec + ts.tv_nsec * 1e-9;
+
/* If this is our first time through, mem_ptr will be null. */
if (dinfo->mem_ptr == NULL) {
/*
@@ -433,6 +435,11 @@ devstat_getdevs(kvm_t *kd, struct statin
}
} else {
+ if (KREADNL(kd, X_TIME_UPTIME, ts.tv_sec) == -1)
+ return(-1);
+ else
+ stats->snap_time = ts.tv_sec;
+
/*
* This is of course non-atomic, but since we are working
* on a core dump, the generation is unlikely to change
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