From: "Jürg Billeter" <j@bitron.ch>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: Matthew Wilcox <willy@infradead.org>,
linux-fsdevel@vger.kernel.org, regressions@lists.linux.dev
Subject: Re: [REGRESSION] fuse: copy_file_range() fails with EIO
Date: Thu, 22 Aug 2024 16:14:45 +0200 [thread overview]
Message-ID: <dbe300f06380729372c42c0cb198c721d9d9b083.camel@bitron.ch> (raw)
In-Reply-To: <CAJfpegtNF4yCH_00xzBB1OnPBHk+EP0ojxDPp=qCFVKC=c14ag@mail.gmail.com>
On Thu, 2024-08-22 at 15:32 +0200, Miklos Szeredi wrote:
> On Thu, 22 Aug 2024 at 15:14, Miklos Szeredi <miklos@szeredi.hu>
> wrote:
>
> > > > What I don't understand is how this results in the -EIO that Jürg
> > > > reported.
> > >
> > > I'm not really familiar with this code but it seems `folio_end_read()`
> > > uses xor to update the `PG_uptodate` flag. So if it was already set, it
> > > will incorrectly clear the `PG_uptodate` set, which I guess triggers
> > > the issue.
>
> Untested patch attached. Could you please try this?
I can no longer reproduce the issue with this patch. So at least with
regards to my test case, it looks good to me.
Cheers,
Jürg
next prev parent reply other threads:[~2024-08-22 14:15 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-09 15:53 [REGRESSION] fuse: copy_file_range() fails with EIO Jürg Billeter
2024-08-09 16:03 ` Matthew Wilcox
2024-08-09 16:22 ` [PATCH 1/3] fuse: remove call to SetPageError Matthew Wilcox (Oracle)
2024-08-09 16:22 ` [PATCH 2/3] fuse: Use a folio instead of a page Matthew Wilcox (Oracle)
2024-08-09 16:22 ` [PATCH 3/3] fuse: use folio_end_read Matthew Wilcox (Oracle)
2024-08-10 12:24 ` Jürg Billeter
2024-08-20 12:57 ` Jürg Billeter
2024-08-20 13:50 ` Matthew Wilcox
2024-08-22 11:58 ` Miklos Szeredi
2024-08-22 12:25 ` Matthew Wilcox
2024-08-10 5:56 ` [REGRESSION] fuse: copy_file_range() fails with EIO Jürg Billeter
2024-08-10 15:12 ` Matthew Wilcox
2024-08-22 13:04 ` Miklos Szeredi
2024-08-22 13:12 ` Jürg Billeter
2024-08-22 13:14 ` Miklos Szeredi
2024-08-22 13:32 ` Miklos Szeredi
2024-08-22 14:14 ` Jürg Billeter [this message]
2024-08-29 9:27 ` Marcel Ziswiler
2024-08-29 9:30 ` Miklos Szeredi
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