From: Tomohiro Kusumi <tkusumi@xxxxxxxxxx>
pre_read_file() could ignore a chrdev due to its purpose of providing
unbuffered access to devices not limited to seekable disk devices,
while the purpose of this function (i.e. pre_read= option) is to
lseek(2) the given offset and page cache whatever read via read(2)
which is basically for filesystems and blkdevs.
(This commit directly goes on top of the one before previous one)
Signed-off-by: Tomohiro Kusumi <tkusumi@xxxxxxxxxx>
---
filesetup.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/filesetup.c b/filesetup.c
index cd486ea..612e794 100644
--- a/filesetup.c
+++ b/filesetup.c
@@ -239,6 +239,9 @@ static int pre_read_file(struct thread_data *td, struct fio_file *f)
td_ioengine_flagged(td, FIO_NOIO))
return 0;
+ if (f->filetype == FIO_TYPE_CHAR)
+ return 0;
+
if (!fio_file_open(f)) {
if (td->io_ops->open_file(td, f)) {
log_err("fio: cannot pre-read, failed to open file\n");
--
2.9.3
--
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