From 6c1bb4bcfce103b3ef95e43fa5376b7d611ccc79 Mon Sep 17 00:00:00 2001
From: Sverker Eriksson <sverker@erlang.org>
Date: Wed, 12 Apr 2017 17:34:46 +0200
Subject: erts: Increase number of check_io-fd-locks

and use correct cache alignment.
---
 erts/emulator/sys/common/erl_check_io.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/erts/emulator/sys/common/erl_check_io.c b/erts/emulator/sys/common/erl_check_io.c
index 834b77eb58..f0854e8730 100644
--- a/erts/emulator/sys/common/erl_check_io.c
+++ b/erts/emulator/sys/common/erl_check_io.c
@@ -148,10 +148,11 @@ struct removed_fd {
 #ifdef ERTS_SYS_CONTINOUS_FD_NUMBERS
 static int max_fds = -1;
 #endif
-#define DRV_EV_STATE_LOCK_CNT 16
+
+#define DRV_EV_STATE_LOCK_CNT 128
 static union {
     erts_mtx_t lck;
-    byte _cache_line_alignment[64];
+    byte _cache_line_alignment[ERTS_ALC_CACHE_LINE_ALIGN_SIZE(sizeof(erts_mtx_t))];
 }drv_ev_state_locks[DRV_EV_STATE_LOCK_CNT];
 
 static ERTS_INLINE erts_mtx_t* fd_mtx(ErtsSysFdType fd)
-- 
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