zio_get_compression_max_size: optimize for ZLE

ZLE compressor needs additional bytes to process d_len argument efficiently. Add some bytes for BPE_PAYLOAD_SIZE case before we rework zle compressor somehow. Signed-off-by: George Melikov <[email protected]>
openzfs · May 29, 2024 · 17efc68 · 17efc68
1 parent 4e64279
commit 17efc68
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/module/zfs/zio.c b/module/zfs/zio.c
@@ -1687,7 +1687,8 @@ zio_get_compression_max_size(uint64_t gcd_alloc, uint64_t min_alloc,
 
 	d_len = d_len - d_len % gcd_alloc;
 	if (d_len < min_alloc)
-		return (BPE_PAYLOAD_SIZE);
+		/* Add n bytes for ZLE or will fail fast earlier */
+		return (BPE_PAYLOAD_SIZE + 64);
 	return (d_len);
 }