generic_file_aio_write on nfs

generic_file_aio_write on nfs

[Michal Simek]

Hi Benjamin,

I am doing LTP tests on Microblaze cpu and I am getting some faults.
I found that the problem is caused by generic_file_aio_write function.
I did quick patch with disable usage of generic_file_aio_write function and
use only write function which works. I haven't debug
generic_file_aio_write function.

I am running Linux with initramfs and LTP programs are run from nfs.

Have you ever met with this problem?

Thanks,
Michal

[monstr@monstr linux-monstr.eu-commit]$ git diff fs/read_write.c
diff --git a/fs/read_write.c b/fs/read_write.c
index 400fe81..e639098 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -642,7 +642,8 @@ static ssize_t do_readv_writev(int type, struct file
*file,
                fnv = file->f_op->aio_read;
        } else {
                fn = (io_fn_t)file->f_op->write;
-               fnv = file->f_op->aio_write;
+               //fnv = file->f_op->aio_write;
+               fnv = 0;
        }
 
        if (fnv)

-- 
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854

Re: generic_file_aio_write on nfs

[Michal Simek]

Hi All,

can someone met with problem writev01, writev03, writev04?
Kernel patch below solve my issue but I have no idea why I couldn't use
generic aio write function.

Thanks,
Michal
> Hi Benjamin,
>
> I am doing LTP tests on Microblaze cpu and I am getting some faults.
> I found that the problem is caused by generic_file_aio_write function.
> I did quick patch with disable usage of generic_file_aio_write function and
> use only write function which works. I haven't debug
> generic_file_aio_write function.
>
> I am running Linux with initramfs and LTP programs are run from nfs.
>
> Have you ever met with this problem?
>
> Thanks,
> Michal
>
> [monstr@monstr linux-monstr.eu-commit]$ git diff fs/read_write.c
> diff --git a/fs/read_write.c b/fs/read_write.c
> index 400fe81..e639098 100644
> --- a/fs/read_write.c
> +++ b/fs/read_write.c
> @@ -642,7 +642,8 @@ static ssize_t do_readv_writev(int type, struct file
> *file,
>                 fnv = file->f_op->aio_read;
>         } else {
>                 fn = (io_fn_t)file->f_op->write;
> -               fnv = file->f_op->aio_write;
> +               //fnv = file->f_op->aio_write;
> +               fnv = 0;
>         }
>  
>         if (fnv)
>
>   


-- 
Michal Simek, Ing. (M.Eng)
PetaLogix - Linux Solutions for a Reconfigurable World
w: www.petalogix.com p: +61-7-30090663,+42-0-721842854 f: +61-7-30090663