fellow_cache: Fix seglist strategy

this wrong line counteracted fdb260e2 :(

src/fellow_cache.c

@@ -2860,7 +2860,7 @@ fellow_disk_seglist_alloc(struct fellow_busy *fbo,
 		return (FCR_ALLOCFAIL("seglist disk region"));
 	ofdsl->next = *fdr;
 
-	ldsegs = fellow_disk_seglist_fit(fdr->size);
+	assert(fellow_disk_seglist_fit(fdr->size) >= ldsegs);
 
 	reqs = BUDDY_REQS_STK(fbo->fc->membuddy, 2);
 	BUDDY_REQS_PRI(reqs, FEP_META);
@@ -7063,7 +7063,7 @@ t_cache(const char *fn, unsigned chksum)
 	VSHA256_CTX sha256ctx;
 	unsigned char h1[SHA256_LEN];
 	struct stvfe_tune tune[1];
-	const size_t memsz = 10 * 1024 * 1024;
+	const size_t memsz = 20 * 1024 * 1024;
 	const size_t dsksz = 100 * 1024 * 1024;
 	const size_t objsize_hint = 4 * 1024;
 	struct fellow_cache_res fcr;
@@ -7161,7 +7161,8 @@ t_cache(const char *fn, unsigned chksum)
 			break;
 
 		fcsl = fbo->body_seglist;
-		fcr = fellow_disk_seglist_alloc(fbo, fcsl, 1, FH_SHA256);
+		fcr = fellow_disk_seglist_alloc(fbo, fcsl,
+		    fellow_busy_body_seglist_size_strategy(1, 12), FH_SHA256);
 		assert(fcr.status == fcr_ok);
 		CAST_OBJ_NOTNULL(fcsl, fcr.r.ptr, FELLOW_CACHE_SEGLIST_MAGIC);
 		u++;