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From: "Ananiev, Leonid I" <leonid.i.ananiev@intel.com>
To: "Ken Chen" <kenchen@google.com>
Cc: <suparna@in.ibm.com>, "Andrew Morton" <akpm@linux-foundation.org>,
	<linux-kernel@vger.kernel.org>, "linux-aio" <linux-aio@kvack.org>,
	"Zach Brown" <zach.brown@oracle.com>,
	"Chris Mason" <chris.mason@oracle.com>,
	"Badari Pulavarty" <pbadari@us.ibm.com>
Subject: RE: [PATCH] aio: fix kernel bug when page is temporally busy
Date: Sun, 11 Feb 2007 00:57:18 +0300	[thread overview]
Message-ID: <B41635854730A14CA71C92B36EC22AAC804B02@mssmsx411> (raw)
In-Reply-To: <b040c32a0702101005q7ff4a679xd3586531aa8a99cc@mail.gmail.com>

Ken Chen writes:
> So any error value returned from invalidate_inode_pages2_range() has
> to be taken seriously in the direct IO submit path instead of dropping
> it to the floor.

If invalidate_inode_pages2_range() will return EIOCBRETRY as the patch 
"aio: fix kernel bug when page is temporally busy"
serts then do_sync_read/write() will not drop IO submit but will retry
it:
        for (;;) {
                ret = filp->f_op->aio_read(&kiocb, &iov, 1,
kiocb.ki_pos);
                if (ret != -EIOCBRETRY)
                        break;
                wait_on_retry_sync_kiocb(&kiocb);
        }

And do_sync_read/write() will not return EIO if page is busy as it does
now, befor patching.
Curretly do_sync_read/write() tests for EIOCBRETRY. But EIOCBRETRY is
not set ever.

Leonid

  parent reply	other threads:[~2007-02-10 21:57 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-09  4:29 Ananiev, Leonid I
2007-02-09  4:35 ` Andrew Morton
2007-02-09  5:41   ` Ananiev, Leonid I
2007-02-09  5:52     ` Andrew Morton
2007-02-12 22:52       ` Ananiev, Leonid I
2007-02-12 23:21       ` Ananiev, Leonid I
2007-02-09  7:16     ` Suparna Bhattacharya
2007-02-09  9:52       ` Ananiev, Leonid I
2007-02-09 10:11         ` Jiri Kosina
2007-02-10 18:05         ` Ken Chen
2007-02-10 18:17           ` Ananiev, Leonid I
2007-02-10 18:27           ` Ananiev, Leonid I
2007-02-10 21:57           ` Ananiev, Leonid I [this message]
2007-02-15  9:16           ` Ananiev, Leonid I
2007-02-15 18:25             ` Zach Brown
2007-02-15 19:11               ` Ananiev, Leonid I
2007-02-15 19:22                 ` Zach Brown
2007-02-15 21:06                   ` Ananiev, Leonid I
2007-02-15 23:32                   ` Ananiev, Leonid I
2007-02-16  0:01                     ` Zach Brown
2007-02-16 12:18                       ` Ananiev, Leonid I
2007-02-09  9:54 ` Jiri Kosina
2007-02-09 10:14   ` Andrew Morton
2007-02-09 10:40     ` Jiri Kosina
2007-02-09 11:05       ` Suparna Bhattacharya
2007-02-09 11:18         ` Ananiev, Leonid I
2007-02-09 17:02         ` Zach Brown
2007-02-10 19:36 Ananiev, Leonid I
2007-02-14 17:51 Ananiev, Leonid I
2007-02-15  3:30 ` Andrew Morton
2007-02-15  5:26   ` Ananiev, Leonid I

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