fellow_cache_test: extend t_budyobj for varying ldsegs

src/fellow_cache.c

@@ -7012,7 +7012,7 @@ t_lcb(struct fellow_cache *fc)
 #define PP(x) (void *)(uintptr_t)(x)
 // test concurrent iter while filling object
 static void
-t_busyobj(unsigned chksum, struct fellow_cache *fc)
+t_busyobj(unsigned chksum, struct fellow_cache *fc, uint16_t limit_ldsegs)
 {
 	unsigned char h1[SHA256_LEN], h2[SHA256_LEN];
 	struct fellow_cache_obj *fco;
@@ -7049,7 +7049,7 @@ t_busyobj(unsigned chksum, struct fellow_cache *fc)
 	DBG("concurrent test_iter thread %p", PP(iter_thr->thr));
 
 	u = fco->fcsl->fdsl->lsegs + 72 * 2;
-	XXX_LIMIT_LDSEGS = 1;
+	XXX_LIMIT_LDSEGS = limit_ldsegs;
 	while (u-- > 0) {
 		void *p;
 		sz = 1234;
@@ -7361,7 +7361,7 @@ t_cache(const char *fn, unsigned chksum)
 	test_fellow_cache_unbusy_inject(fc);
 
 	for (u = 0; u < 100; u++)
-		t_busyobj(chksum, fc);
+		t_busyobj(chksum, fc, u);
 
 	// === alloc, then evict
 	VSHA256_Init(&sha256ctx);