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From: Zach Brown <zach.brown@oracle.com>
To: Benjamin LaHaise <bcrl@kvack.org>
Cc: Chris Mason <chris.mason@oracle.com>,
	"Ananiev, Leonid I" <leonid.i.ananiev@intel.com>,
	linux-aio@kvack.org, linux-kernel@vger.kernel.org,
	Suparna bhattacharya <suparna@in.ibm.com>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH] aio: propogate post-EIOCBQUEUED errors to completion event
Date: Mon, 19 Feb 2007 16:26:18 -0800	[thread overview]
Message-ID: <998821DA-955A-4F4E-A3C5-4BEAE6FFF90B@oracle.com> (raw)
In-Reply-To: <20070220002109.GG31205@kvack.org>

>> I would argue that one common cause of the EIO is userland
>> error (mmap concurrent with O_DIRECT), and EIO is the correct answer.
>
> I disagree.  That means that using the pagecache to synchronize  
> things like
> the proposed online defragmentation will occasionally make O_DIRECT  
> users
> fail.

Well, only if the pages couldn't be invalidated.  Arguably ext3  
should be trying a lot harder to invalidate before giving up and  
returning failure from invalidate_page().

Hopefully this all goes away in the long term with Chris'  
"placeholder" work that stops insertions into the radix tree while  
dio ops are in flight.

- z

  reply	other threads:[~2007-02-20  0:27 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-19 20:35 Zach Brown
2007-02-19 20:47 ` Benjamin LaHaise
2007-02-19 21:07   ` Zach Brown
2007-02-19 20:58 ` Ananiev, Leonid I
2007-02-19 21:50   ` Chris Mason
2007-02-20  0:21     ` Benjamin LaHaise
2007-02-20  0:26       ` Zach Brown [this message]
2007-02-20  0:28       ` Chris Mason
2007-02-20 16:01       ` Trond Myklebust
2007-02-20 16:06         ` Benjamin LaHaise
2007-02-20 16:06         ` Arjan van de Ven
2007-02-20 16:19           ` Chris Mason
2007-02-20 16:08         ` Chris Mason
2007-02-20 16:29           ` Trond Myklebust
2007-02-20 16:38             ` Trond Myklebust
2007-02-20 18:40             ` Zach Brown
2007-02-21  0:05               ` Trond Myklebust
2007-02-20 14:08 ` Ananiev, Leonid I

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