Re: [Xen-devel] [OSSTEST PATCH 2/2] Executive DB: Reduce strength of DB locks

2015-12-11 Thread Ian Jackson
Ian Campbell writes ("Re: [OSSTEST PATCH 2/2] Executive DB: Reduce strength of DB locks"): > On Fri, 2015-12-11 at 16:23 +, Ian Jackson wrote: > >   SET TRANSACTION ISOLATION LEVEL SERIALIZABLE; > > not mean that the transactions are necessarily serialisable! > >  ^does not? Yes, thanks. >

Re: [Xen-devel] [OSSTEST PATCH 2/2] Executive DB: Reduce strength of DB locks

2015-12-11 Thread Ian Campbell
On Fri, 2015-12-11 at 16:23 +, Ian Jackson wrote: > The purpose of these locks is partly to prevent transactions being > aborted (which I'm not sure the existing code would in practice cope > with, although this is a bug) and also to avoid bugs due to the fact > that >   SET TRANSACTION ISOLATI

[Xen-devel] [OSSTEST PATCH 2/2] Executive DB: Reduce strength of DB locks

2015-12-11 Thread Ian Jackson
The purpose of these locks is partly to prevent transactions being aborted (which I'm not sure the existing code would in practice cope with, although this is a bug) and also to avoid bugs due to the fact that SET TRANSACTION ISOLATION LEVEL SERIALIZABLE; not mean that the transactions are necess