perf record: Reduce memory for recording PERF_RECORD_LOST_SAMPLES event

Reduce from PERF_SAMPLE_MAX_SIZE to "sizeof(*lost) +
session->machines.host.id_hdr_size".

Suggested-by: Namhyung Kim <[email protected]>
Signed-off-by: Ian Rogers <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

tools/perf/builtin-record.c

@@ -1954,7 +1954,8 @@ static void record__read_lost_samples(struct record *rec)
 
 				if (count.lost) {
 					if (!lost) {
-						lost = zalloc(PERF_SAMPLE_MAX_SIZE);
+						lost = zalloc(sizeof(*lost) +
+							      session->machines.host.id_hdr_size);
 						if (!lost) {
 							pr_debug("Memory allocation failed\n");
 							return;
@@ -1970,7 +1971,8 @@ static void record__read_lost_samples(struct record *rec)
 		lost_count = perf_bpf_filter__lost_count(evsel);
 		if (lost_count) {
 			if (!lost) {
-				lost = zalloc(PERF_SAMPLE_MAX_SIZE);
+				lost = zalloc(sizeof(*lost) +
+					      session->machines.host.id_hdr_size);
 				if (!lost) {
 					pr_debug("Memory allocation failed\n");
 					return;