Re: [Xen-devel] [Bug 198497] handle_mm_fault / xen_pmd_val / radix_tree_lookup_slot Null pointer

2018-09-04 Thread Jason Andryuk
On Mon, Apr 23, 2018 at 4:17 AM Juergen Gross wrote: > On 20/04/18 17:20, Jason Andryuk wrote: > > Adding xen-devel and the Linux Xen maintainers. > > > > Summary: Some Xen users (and maybe others) are hitting a BUG in > > __radix_tree_lookup() under do_swap_page() - example backtrace is > >

Re: [Xen-devel] [Bug 198497] handle_mm_fault / xen_pmd_val / radix_tree_lookup_slot Null pointer

2018-04-23 Thread Juergen Gross
On 20/04/18 17:20, Jason Andryuk wrote: > Adding xen-devel and the Linux Xen maintainers. > > Summary: Some Xen users (and maybe others) are hitting a BUG in > __radix_tree_lookup() under do_swap_page() - example backtrace is > provided at the end. Matthew Wilcox provided a band-aid patch that >

Re: [Xen-devel] [Bug 198497] handle_mm_fault / xen_pmd_val / radix_tree_lookup_slot Null pointer

2018-04-21 Thread Juergen Gross
On 21/04/18 16:35, Matthew Wilcox wrote: > On Fri, Apr 20, 2018 at 10:02:29AM -0600, Jan Beulich wrote: >> Skylake 32bit PAE Dom0: >> Bad swp_entry: 8000 >> mm/swap_state.c:683: bad pte d3a39f1c(8004) >> >> Ivy Bridge 32bit PAE Dom0: >> Bad swp_entry:

Re: [Xen-devel] [Bug 198497] handle_mm_fault / xen_pmd_val / radix_tree_lookup_slot Null pointer

2018-04-21 Thread Matthew Wilcox
On Fri, Apr 20, 2018 at 10:02:29AM -0600, Jan Beulich wrote: > Skylake 32bit PAE Dom0: > Bad swp_entry: 8000 > mm/swap_state.c:683: bad pte d3a39f1c(8004) > > Ivy Bridge 32bit PAE Dom0: > Bad swp_entry: 4000 > mm/swap_state.c:683: bad pte

Re: [Xen-devel] [Bug 198497] handle_mm_fault / xen_pmd_val / radix_tree_lookup_slot Null pointer

2018-04-21 Thread Juergen Gross
On 20/04/18 21:20, Boris Ostrovsky wrote: > On 04/20/2018 12:02 PM, Jan Beulich wrote: > On 20.04.18 at 17:52, wrote: >>> On Fri, Apr 20, 2018 at 11:42 AM, Jan Beulich wrote: >>> On 20.04.18 at 17:25, wrote: > On

Re: [Xen-devel] [Bug 198497] handle_mm_fault / xen_pmd_val / radix_tree_lookup_slot Null pointer

2018-04-20 Thread Boris Ostrovsky
On 04/20/2018 12:02 PM, Jan Beulich wrote: On 20.04.18 at 17:52, wrote: >> On Fri, Apr 20, 2018 at 11:42 AM, Jan Beulich wrote: >> On 20.04.18 at 17:25, wrote: On 20/04/18 16:20, Jason Andryuk wrote: > Adding

Re: [Xen-devel] [Bug 198497] handle_mm_fault / xen_pmd_val / radix_tree_lookup_slot Null pointer

2018-04-20 Thread Jan Beulich
>>> On 20.04.18 at 17:52, wrote: > On Fri, Apr 20, 2018 at 11:42 AM, Jan Beulich wrote: > On 20.04.18 at 17:25, wrote: >>> On 20/04/18 16:20, Jason Andryuk wrote: Adding xen-devel and the Linux Xen maintainers.

Re: [Xen-devel] [Bug 198497] handle_mm_fault / xen_pmd_val / radix_tree_lookup_slot Null pointer

2018-04-20 Thread Andrew Cooper
On 20/04/18 16:52, Jason Andryuk wrote: > On Fri, Apr 20, 2018 at 11:42 AM, Jan Beulich wrote: > On 20.04.18 at 17:25, wrote: >>> On 20/04/18 16:20, Jason Andryuk wrote: Adding xen-devel and the Linux Xen maintainers. Summary: Some

Re: [Xen-devel] [Bug 198497] handle_mm_fault / xen_pmd_val / radix_tree_lookup_slot Null pointer

2018-04-20 Thread Jason Andryuk
On Fri, Apr 20, 2018 at 11:42 AM, Jan Beulich wrote: On 20.04.18 at 17:25, wrote: >> On 20/04/18 16:20, Jason Andryuk wrote: >>> Adding xen-devel and the Linux Xen maintainers. >>> >>> Summary: Some Xen users (and maybe others) are hitting a BUG

Re: [Xen-devel] [Bug 198497] handle_mm_fault / xen_pmd_val / radix_tree_lookup_slot Null pointer

2018-04-20 Thread Jan Beulich
>>> On 20.04.18 at 17:25, wrote: > On 20/04/18 16:20, Jason Andryuk wrote: >> Adding xen-devel and the Linux Xen maintainers. >> >> Summary: Some Xen users (and maybe others) are hitting a BUG in >> __radix_tree_lookup() under do_swap_page() - example backtrace is >>

Re: [Xen-devel] [Bug 198497] handle_mm_fault / xen_pmd_val / radix_tree_lookup_slot Null pointer

2018-04-20 Thread Andrew Cooper
On 20/04/18 16:25, Andrew Cooper wrote: > On 20/04/18 16:20, Jason Andryuk wrote: >> Adding xen-devel and the Linux Xen maintainers. >> >> Summary: Some Xen users (and maybe others) are hitting a BUG in >> __radix_tree_lookup() under do_swap_page() - example backtrace is >> provided at the end.

Re: [Xen-devel] [Bug 198497] handle_mm_fault / xen_pmd_val / radix_tree_lookup_slot Null pointer

2018-04-20 Thread Jason Andryuk
Adding xen-devel and the Linux Xen maintainers. Summary: Some Xen users (and maybe others) are hitting a BUG in __radix_tree_lookup() under do_swap_page() - example backtrace is provided at the end. Matthew Wilcox provided a band-aid patch that prints errors like the following instead of