Hello,
fio with fallocate fails with ENOSYS, but I'm unable to reproduce this
failure outside of fio. The following command:
fio --rw=write --fallocate=keep --filename=hello --size=1G
--runtime=10 --time_based --name=test
reports an error (if there is no file named 'hello' in my current
working directory).
Within the output I see: err=38 (file:filesetup.c:98, func=fallocate,
error=Function not implemented)
The following C program prints 0 (if there is no file named testing in
my current working directory):
#include <linux/falloc.h>
#include <stdio.h>
#include <errno.h>
int main() {
int f = open("testing", "O_CREAT", "0644");
int r = fallocate(f, 01, 0, 1073741824);
printf("%d\n", r);
}
Why is the fio command above failing with ENOSYS when this test
program runs without errors?
Also,
$ strace fallocate -n -l 1G test
...
fallocate(3, 01, 0, 1073741824) = 0
...
the fallocate system call seems to work.
I'm using Fedora 16 , fio 2.07, and an ext4 filesystem
$ fio --version
fio 2.0.7
$ uname -r
3.1.0-7.fc16.x86_64
$ mount
...
/dev/mapper/vg_kcastiglia-lv_home on /home type ext4
(rw,relatime,seclabel,user_xattr,acl,barrier=1,data=ordered)
...
$ ldd --version
ldd (GNU libc) 2.14.90
...
$ gcc --version
gcc (GCC) 4.6.3 20120306 (Red Hat 4.6.3-2)
...
Thanks for your help,
Kevin Castiglia
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