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From:   Jeff Chua <jeff.chua.linux@gmail.com>
Date:   Sat, 31 Dec 2022 20:41:34 +0800
Message-ID: <CAAJw_ZvFvKx+mVd+pWMPVvEnOPkmBBETMqrA_P-3wRGW5HRkDw@mail.gmail.com>
Subject: Re: Fwd: f2fs write error Linux v6.2
To:     Chao Yu <chao@kernel.org>, Yangtao Li <frank.li@vivo.com>
Cc:     Thorsten Leemhuis <regressions@leemhuis.info>,
        Eric Biggers <ebiggers@kernel.org>,
        lkml <linux-kernel@vger.kernel.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Bagas Sanjaya <bagasdotme@gmail.com>,
        Jaegeuk Kim <jaegeuk@kernel.org>,
        F2FS Development <linux-f2fs-devel@lists.sourceforge.net>,
        Linux Regressions <regressions@lists.linux.dev>
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On Sat, Dec 31, 2022 at 7:57 PM Jeff Chua <jeff.chua.linux@gmail.com> wrote:
>
> On Sat, Dec 31, 2022 at 10:51 AM Chao Yu <chao@kernel.org> wrote:
> >
> > Hi Jeff,
> >
> > On 2022/12/30 14:39, Eric Biggers wrote:
> > > If you could provide the mkfs and mount options you are using, and any other
> > > relevant details, that would be helpful.  Bisection would also be very helpful,
> > > as Thorsten mentioned.
>
> I was just preparing my environment so I could hit the same issue
> before I go for the bisect, so I don't need to reboot every time. Got
> to a point where I could just qemu kvm + initrd ramdisk with / (f2fs)
> and I could hit the problem almost every 8/10 runs just by doing
> "mount -o remount /" and the system would freeze. That's good. I've a
> good test case! ... and then I see Chao Yu's patch ...
>
> > Other than that, I found some cases which can cause similar issue, so I figure
> > out a patch for possible fixing, if you can have a try with it to check whether
> > it can fix your issue, that would be helpful as well.
> >
> > https://lore.kernel.org/linux-f2fs-devel/20221230154332.5082-1-chao@kernel.org/T/#u
>
> Ok, the patch seems to fix the problem. I'll run my qemu kvm
> environment a few more times before I switch the real system. Because
> it's not a that I could cause a real "mount -o remount /" freeze or
> "vi /etc/passwd" fault all the time,
>
> Will feedback soon. This would a very nice year end celebration so I
> could move to 6.2.0-rc1.

Ok, no more freeze, no more errors! All good. I'm finally on the
latest linux-6.2.0-rc1 with the patch.

Happy new year!

My best,
Jeff