Re: [Xen-devel] Unstableness in grant table block drivers

[Steven Hand <Steven.Hand@xxxxxxxxxxxx>]

>We've experienced a lot of problems in the new grant table-based block
>drivers.  It's exposing itself in a number of ways.  I've seen it stop
>working after working for a bit, sometimes XenU stops half-way through
>boot, and on one system init panics because it can't find a root
>filesystem.

Have you made any progress in further identifying or narrowing down 
these bugs? Detailed bug reports or, better, patches, are always more
useful than general reports of issues. 

>Grant table block drivers are now the default config option in
>xen-unstable even though it's marked as experimental.  Perhaps it should
>not be default until it gets a bit more stable?

We've not seen any bugs ourselves but obviously if it's biting you 
regularly then may be worth while disabling in your config. I'm 
loathe to disable it by default in the general config since this 
won't help us uncover and fix whatever bugs are present. 

>I know the last week's been really busy, but in the future, it would be
>nice if a big destabilizing change like this could get announced on
>xen-devel so we could be on the look out for these sort of bugs.

Sure, good point (though as mentioned above, we hadn't seen any 
problems ourselves -- we strongly appreciate the community effort
in helping us ensure new changes work on a broad range of configs 
and usage scenarios). 

cheers,

S.


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