From: Earle F. Philhower, III <earlephilhower@yahoo.com>
Date: Tue, 8 Oct 2019 23:13:02 +0000 (-0700)
Subject: Increase MAX_FILELOCKS for highly parallel IO test
X-Git-Tag: fio-3.17~36^2
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=43661a66a8c3b9fb5ff28b463c9ab0aac91a0355;p=fio.git

Increase MAX_FILELOCKS for highly parallel IO test

When running hundreds of threads and collecting CLAT, SLAT, IOS on a
per-thread basis, FIO can need a lot of file locks to complete.  When
it can't get them, it gives the cryptic error message:
> fio: filelock.c:182: __fio_lock_file: Assertion `!trylock' failed.

Bump the maximum from 128 to 1024 to give headroom for high core count,
high thread count testing.
---

diff --git a/filelock.c b/filelock.c
index cc98aafc..7e92f63d 100644
--- a/filelock.c
+++ b/filelock.c
@@ -22,7 +22,7 @@ struct fio_filelock {
 	unsigned int references;
 };
 
-#define MAX_FILELOCKS	128
+#define MAX_FILELOCKS	1024
 	
 static struct filelock_data {
 	struct flist_head list;