Re: Debian 10, xen 4.11 reliability

[Casper <kl@xxxxx>]

Hello,

I can report I have root and rest fs ext3 too, but is it correct Debian 
uses ext4 for mounting ext3?
[    8.314622] EXT4-fs (md0): mounting ext3 file system using the ext4 
subsystem
[   10.192765] EXT4-fs (md0): mounted filesystem with ordered data mode. 
Opts: (null)
All domU use ext3, even new debian machines.

Casper

On 16.07.20 06:57, Sarah Newman wrote:
> On 7/14/20 2:00 AM, Hans van Kranenburg wrote:
> > On 7/14/20 1:16 AM, Adam Goryachev wrote:
> > > On 14/7/20 03:02, Hans van Kranenburg wrote:
> > > > Hi Casper,
> > > >
> > > > On 7/9/20 10:45 AM, Casper wrote:
> > > > > [...]
> > > > > Or problem with Debian Xen package as it not so popular anymore?
> > > > > Any suggestion what to test to figure out problem?
> > > BTW, I don't think is a general rule that Debian 10.4 with packages Xen
> > > 4.11 doesn't work.
> > True. It just works (tm), until you have some edge case hardware that
> > misbehaves, or you run into an edge case bug with a very specific
> > combination of non-default configuration here and there (or when you try
> > to use EFI, cough).
> >
> > So, to add to the list:
> > * Run latest BIOS / cpu microcode that is available.
> > * Other firmware, e.g. for raid controller or whatever?
> > * Is the box using ECC memory? I mean, even a memory module that flips a
> > bit now and then can crash a server every few weeks... Run a memtest or
> > 7zip benchmark or what was the thing that's very good at exposing memory
> > errors...
> >
> > Also, feel free to open a bug report in the Debian bug tracker, we're
> > willing to help, but expect that you have to do the work to gather all
> > info. I don't have a similar piece of hardware lying around here... What
> > distro package maintainers can do is help users to gather enough info to
> > have a good report that doesn't waste too much time of the upstream
> > developers.
> Here is a bug I opened a week ago against Debian Buster:
>
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=964494
>
> It looks like only newer versions of the kernel are a problem. We think 
> the trigger is either ext3 or Xen.
> The problem may not show up for weeks, and we do not know what triggers it.
>
> If anyone has more data points to add that would help isolate the issue 
> to one or the other, it would be appreciated.
> --Sarah