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-rw-r--r--tools/xentrace/xentrace.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/xentrace/xentrace.c b/tools/xentrace/xentrace.c
index db652a2283..dd5471a3e9 100644
--- a/tools/xentrace/xentrace.c
+++ b/tools/xentrace/xentrace.c
@@ -804,6 +804,9 @@ static void usage(void)
" -V, --version Print program version\n" \
" -M, --memory-buffer=b Copy trace records to a circular memory buffer.\n" \
" Dump to file on exit.\n" \
+" -r --reserve-disk-space=n Before writing trace records to disk, check to see\n" \
+" that after the write there will be at least n space\n" \
+" left on the disk.\n" \
"\n" \
"This tool is used to capture trace buffer data from Xen. The\n" \
"data is output in a binary format, in the following order:\n" \