On Wed, Oct 23, 2019 at 03:47:57PM +0200, Thomas Gleixner wrote:
>
> So the fix is trivial.
Works like a charm.
Tested-by: Cyrill Gorcunov
On Wed, Oct 23, 2019 at 03:47:57PM +0200, Thomas Gleixner wrote:
>
> And you are right this happens because cea_exception_stacks is not yet
> initialized which makes begin = 0 and therefore point into nirvana.
>
> So the fix is trivial.
Great! Thanks a lot for sych detailed analysis! I'll test
On Wed, 23 Oct 2019, Thomas Gleixner wrote:
> On Tue, 22 Oct 2019, Cyrill Gorcunov wrote:
> Ergo ep must be a valid pointer pointing to the statically allocated and
> statically initialized estack_pages array.
>
> /* Guard page? */
> if (!ep->size)
>
> How on earth can
On Wed, Oct 23, 2019 at 03:38:40PM +0200, Thomas Gleixner wrote:
> > >
> > > [0,2,4,5,6,8,10,12] are guard pages so 0 is not that crappy at all
> >
> > Wait, Thomas, I might be wrong, but per-cpu is initialized to the pointer,
> > the memory for this estack_pages has not yet been allocated, no?
On Wed, 23 Oct 2019, Cyrill Gorcunov wrote:
> On Wed, Oct 23, 2019 at 03:21:05PM +0200, Thomas Gleixner wrote:
> > Errm. estack_pages is statically initialized and it's an array of:.
> >
> > struct estack_pages {
> > u32 offs;
> > u16 size;
> > u16 type;
> > };
On Tue, 22 Oct 2019, Cyrill Gorcunov wrote:
> On Tue, Oct 22, 2019 at 05:23:25PM +0300, Cyrill Gorcunov wrote:
> >
> > I presume the kmemleak tries to save stack trace too early when
> > estack_pages are not
> > yet filled.
>
> Indeed, at this stage of boot the percpu_setup_exception_stacks has
On Wed, Oct 23, 2019 at 03:21:05PM +0200, Thomas Gleixner wrote:
> On Tue, 22 Oct 2019, Cyrill Gorcunov wrote:
> > On Tue, Oct 22, 2019 at 05:23:25PM +0300, Cyrill Gorcunov wrote:
> > >
> > > I presume the kmemleak tries to save stack trace too early when
> > > estack_pages are not
> > > yet
On Tue, Oct 22, 2019 at 05:23:25PM +0300, Cyrill Gorcunov wrote:
>
> I presume the kmemleak tries to save stack trace too early when estack_pages
> are not
> yet filled.
Indeed, at this stage of boot the percpu_setup_exception_stacks has not been
called
yet and estack_pages full of crap
[
On Sat, Oct 19, 2019 at 02:44:21PM +0300, Cyrill Gorcunov wrote:
...
>
> I nailed it down to the following kmemleak code
>
> create_object
> ...
> object->trace_len = __save_stack_trace(object->trace);
>
> if I drop this line out it boots fine. Just wanted to share the observation,
>
Hi! I'm not sure if I've CC'ed proper persons, so please sorry if I did.
Anyway, today's -tip (07b4dbf1d830) refused to boot
[0.024793] No NUMA configuration found
[0.025406] Faking a node at [mem 0x-0x7ffdefff]
[0.026462] NODE_DATA(0) allocated [mem
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