linux-kernel - Re: generic_file_aio

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Message-ID: <4A5B549E.4040003@petalogix.com>
Date:	Mon, 13 Jul 2009 17:37:02 +0200
From:	Michal Simek <michal.simek@...alogix.com>
To:	monstr@...str.eu
CC:	linux-aio@...ck.org,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: generic_file_aio_write on nfs

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@...str 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

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