On Thu, 2019-09-05 at 13:43 +0200, Joerg Roedel wrote:
> Hi Qian,
>
> On Wed, Sep 04, 2019 at 05:24:22PM -0400, Qian Cai wrote:
> > if (domain->mode == PAGE_MODE_6_LEVEL)
> > /* address space already 64 bit large */
> > return false;
> >
> > This gives a clue that ther
Hi Qian,
On Wed, Sep 04, 2019 at 05:24:22PM -0400, Qian Cai wrote:
> if (domain->mode == PAGE_MODE_6_LEVEL)
> /* address space already 64 bit large */
> return false;
>
> This gives a clue that there must be a race between multiple concurrent
> threads in increas
When the system is under some memory pressure, it could cause disks on
the "smartpqi" driver going offline below. From the UBSAN report, it
indicates that "domain->mode" becomes 7. Further investigation indicates
that the only place that would increase "domain->mode" is
increase_address_space() but
