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From: Christoph Hellwig <>
To: Jonathan Nicklin <>
Subject: Re: BUG: aio/direct-io data corruption in 4.7
Date: Wed, 21 Sep 2016 07:15:39 -0700
Message-ID: <> (raw)
In-Reply-To: <>

Hi Jonathan,

please keep linux-fsdevel on the Cc list for something like, and if
you already track down a commit the author of that commit.

> Description: "fs: simplify the generic_write_sync prototype"
> Committed: Apr 7, 2016
> Hash: e259221763a40403d5bb232209998e8c45804ab8
> Affects: 4.7-rc1 - master
> I have confirmed a fix for the AIO/Direct-IO failure condition but
> have not reviewed the rest of the changes associated with that commit.
> If you would like a small patch for direct-io.c, let me know.

On travel right now, but I suspect you want something like this fix?

diff --git a/fs/direct-io.c b/fs/direct-io.c
index 7c3ce73..891f71f 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -276,7 +276,7 @@ static ssize_t dio_complete(struct dio *dio, ssize_t ret, bool is_async)
 		dio->iocb->ki_pos += transferred;
 		if (dio->op == REQ_OP_WRITE)
-			ret = generic_write_sync(dio->iocb,  transferred);
+			ret = generic_write_sync(dio->iocb, ret);
 		dio->iocb->ki_complete(dio->iocb, ret, 0);

  reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-12 18:38 Jonathan Nicklin
2016-09-21 14:15 ` Christoph Hellwig [this message]
2018-11-05 15:16 Gregory Shapiro
2018-11-06  7:28 ` Jack Wang
2018-11-06 11:31   ` Gregory Shapiro
2018-11-09 15:44     ` Jack Wang

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