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From: greg@kroah.com (Greg KH)
To: kernelnewbies@lists.kernelnewbies.org
Subject: Wait for an IO to complete
Date: Fri, 28 Mar 2014 11:01:38 -0700	[thread overview]
Message-ID: <20140328180138.GA29170@kroah.com> (raw)
In-Reply-To: <CADDndfOTsiuJV4-TQH8op4mfyvib-RtXeU4PFOy5AD=icAnS6Q@mail.gmail.com>

On Fri, Mar 28, 2014 at 11:16:30PM +0530, Rishi Agrawal wrote:
> Hi All,
> 
> I want to wait in my code till the IO actually goes to the disk.

That's an issue, as you really don't know what a "disk" is from within
the kernel :)

Back up, what exactly are you trying to do?

> For example
> 
> struct buffer_head *bh=sb_bread(sb, 20)
> 
> strcpy(bh->b_data, "Some Data");
> 
> /* mark and sync */
> mark_buffer_dirty(bh);
> sync_dirty_buffer(bh);
> 
> The above code only adds the bh to the request queue and returns.

And that's all you should need.  Why do you feel you need more?

thanks,

greg k-h

  reply	other threads:[~2014-03-28 18:01 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-28 17:46 Wait for an IO to complete Rishi Agrawal
2014-03-28 18:01 ` Greg KH [this message]
2014-03-29 10:07   ` Rishi Agrawal
2014-03-29 12:47 ` Sankar P
2014-03-30 16:29   ` Valdis.Kletnieks at vt.edu
2014-04-01 17:04     ` Rishi Agrawal

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