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Restore the correct value when disabling probes. Otherwise the instrumented

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tracepoints would continue to generate traps, which would be ignored but
could consume noticeable amounts of CPU if, say, all functions in the kernel
were instrumented.

X-MFC-With:	r270067
This commit is contained in:
markj 2014-08-24 17:10:47 +00:00
parent bf5f21dde4
commit 46bd89ef4c
1 changed files with 3 additions and 3 deletions
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6
sys/cddl/dev/fbt/fbt.c
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@ -121,7 +121,7 @@ fbt_doubletrap(void)
fbt = fbt_probetab[i];
for (; fbt != NULL; fbt = fbt->fbtp_next)
*fbt->fbtp_patchpoint = fbt->fbtp_savedval;
fbt_patch_tracepoint(fbt, fbt->fbtp_savedval);
}
}
@ -253,7 +253,7 @@ fbt_disable(void *arg, dtrace_id_t id, void *parg)
return;
for (; fbt != NULL; fbt = fbt->fbtp_next)
fbt_patch_tracepoint(fbt, fbt->fbtp_patchval);
fbt_patch_tracepoint(fbt, fbt->fbtp_savedval);
}
static void
@ -268,7 +268,7 @@ fbt_suspend(void *arg, dtrace_id_t id, void *parg)
return;
for (; fbt != NULL; fbt = fbt->fbtp_next)
fbt_patch_tracepoint(fbt, fbt->fbtp_patchval);
fbt_patch_tracepoint(fbt, fbt->fbtp_savedval);
}
static void