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Diffstat (limited to 'tools/guest-diag/semfix_watch.py')
| -rw-r--r-- | tools/guest-diag/semfix_watch.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/guest-diag/semfix_watch.py b/tools/guest-diag/semfix_watch.py index 400fafe..347da5e 100644 --- a/tools/guest-diag/semfix_watch.py +++ b/tools/guest-diag/semfix_watch.py @@ -145,7 +145,8 @@ def guest_trace(): Read *before* clearing: the create-time probes fire once per client and would be wiped by a clear that races them. """ - inner = ("grep -E \"uvmt|uvch|uvbp|uvpbf\" /sys/kernel/tracing/trace " + inner = ("tail -c 131072 /sys/kernel/tracing/trace " + "| grep -E \"uvmt|uvch|uvbp|uvpbf\" " "| tail -400") if not os.environ.get("KEEP_TRACE"): inner += "; echo > /sys/kernel/tracing/trace" |