From: Bruce Cran <bruce@cran.org.uk>
Date: Wed, 10 Oct 2012 15:24:16 +0000 (+0100)
Subject: Windows: avoid large writes during file layout.
X-Git-Tag: fio-2.0.10~2
X-Git-Url: https://git.kernel.dk/?p=fio.git;a=commitdiff_plain;h=eedd9d0fe637517fd655c4cacdd335ce4959abf2

Windows: avoid large writes during file layout.

Avoid large buffered writes during file layout by flushing changes to disk by
calling _commit() after each write.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/os/windows/posix.c b/os/windows/posix.c
index 24517729..11500e48 100755
--- a/os/windows/posix.c
+++ b/os/windows/posix.c
@@ -411,6 +411,9 @@ int posix_fallocate(int fd, off_t offset, off_t len)
 			break;
 		}
 
+		/* Don't allow Windows to cache the write: flush it to disk */
+		_commit(fd);
+
 		bytes_remaining -= bytes_written;
 	}