Re: Known and unfixed active data loss bug in MM + XFS with large folios since Dec 2021 (any kernel from 6.1 upwards)

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To: David Howells <dhowells@xxxxxxxxxx>
Subject: Re: Known and unfixed active data loss bug in MM + XFS with large folios since Dec 2021 (any kernel from 6.1 upwards)
From: Chris Mason <clm@xxxxxxxx>
Date: Fri, 13 Sep 2024 12:37:49 -0400
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Christian Theune <ct@xxxxxxxxxxxxxxx>, linux-mm@xxxxxxxxx, "linux-xfs@xxxxxxxxxxxxxxx" <linux-xfs@xxxxxxxxxxxxxxx>, linux-fsdevel@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Daniel Dao <dqminh@xxxxxxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, regressions@xxxxxxxxxxxxxxx, regressions@xxxxxxxxxxxxx
In-reply-to: <1368975.1726243446@warthog.procyon.org.uk>
User-agent: Mozilla Thunderbird

On 9/13/24 12:04 PM, David Howells wrote:
> Chris Mason <clm@xxxxxxxx> wrote:
> 
>> I've mentioned this in the past to both Willy and Dave Chinner, but so
>> far all of my attempts to reproduce it on purpose have failed.
> 
> Could it be a splice bug?

I really wanted it to be a splice bug, but I believe the 6.9 workload I
mentioned isn't using splice.  I didn't 100% verify though.

-chris

References:
- Re: Known and unfixed active data loss bug in MM + XFS with large folios since Dec 2021 (any kernel from 6.1 upwards)
  - From: Chris Mason
- Known and unfixed active data loss bug in MM + XFS with large folios since Dec 2021 (any kernel from 6.1 upwards)
  - From: Christian Theune
- Re: Known and unfixed active data loss bug in MM + XFS with large folios since Dec 2021 (any kernel from 6.1 upwards)
  - From: Matthew Wilcox
- Re: Known and unfixed active data loss bug in MM + XFS with large folios since Dec 2021 (any kernel from 6.1 upwards)
  - From: Jens Axboe
- Re: Known and unfixed active data loss bug in MM + XFS with large folios since Dec 2021 (any kernel from 6.1 upwards)
  - From: Linus Torvalds
- Re: Known and unfixed active data loss bug in MM + XFS with large folios since Dec 2021 (any kernel from 6.1 upwards)
  - From: David Howells

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