On Wed, Jan 20, 2021 at 01:18:12PM +0100, Borislav Petkov wrote:
> On Tue, Jan 19, 2021 at 03:57:59PM -0800, Luck, Tony wrote:
> > But the real validation folks took my patch and found that it has
> > destabilized cases 1 & 2 (and case 3 also chokes if you repeat a few
> > more times). System
> Yah, some printk sprinkling might be a good start. But debugging in that
> atomic context is always nasty. ;-\
Some very light printk sprinkling (one message in queue_task_work() in atomic
context, one each in kill_me_now() and kill_me_maybe() to check when task_work
actually called them.
On Tue, Jan 19, 2021 at 03:57:59PM -0800, Luck, Tony wrote:
> But the real validation folks took my patch and found that it has
> destabilized cases 1 & 2 (and case 3 also chokes if you repeat a few
> more times). System either hangs or panics. Generally before 100
> injection/conumption cycles.
On Tue, Jan 19, 2021 at 11:56:32AM +0100, Borislav Petkov wrote:
> On Fri, Jan 15, 2021 at 03:23:46PM -0800, Luck, Tony wrote:
> > On Fri, Jan 15, 2021 at 12:51:03PM -0800, Luck, Tony wrote:
> > > static void kill_me_now(struct callback_head *ch)
> > > {
> > > + p->mce_count = 0;
> > >
On Fri, Jan 15, 2021 at 03:23:46PM -0800, Luck, Tony wrote:
> On Fri, Jan 15, 2021 at 12:51:03PM -0800, Luck, Tony wrote:
> > static void kill_me_now(struct callback_head *ch)
> > {
> > + p->mce_count = 0;
> > force_sig(SIGBUS);
> > }
>
> Brown paper bag time ... I just pasted that line
On Fri, Jan 15, 2021 at 12:51:03PM -0800, Luck, Tony wrote:
> static void kill_me_now(struct callback_head *ch)
> {
> + p->mce_count = 0;
> force_sig(SIGBUS);
> }
Brown paper bag time ... I just pasted that line from kill_me_maybe()
and I thought I did a re-compile ... but obviously
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