Hi Michal,
While working on a bug that was reported to me by "kernel test robot".
unable to handle kernel NULL pointer dereference at (null)
The issue was that page_to_pfn() on that configuration was looking for a
section inside flags fields in "struct page". So, reserved but
Hi Michal,
While working on a bug that was reported to me by "kernel test robot".
unable to handle kernel NULL pointer dereference at (null)
The issue was that page_to_pfn() on that configuration was looking for a
section inside flags fields in "struct page". So, reserved but
Let's CC Hpa on this one. I am still not sure it is correct. The full
series is here
http://lkml.kernel.org/r/1502138329-123460-1-git-send-email-pasha.tatas...@oracle.com
On Mon 07-08-17 16:38:35, Pavel Tatashin wrote:
> Struct pages are initialized by going through __init_single_page(). Since
>
Let's CC Hpa on this one. I am still not sure it is correct. The full
series is here
http://lkml.kernel.org/r/1502138329-123460-1-git-send-email-pasha.tatas...@oracle.com
On Mon 07-08-17 16:38:35, Pavel Tatashin wrote:
> Struct pages are initialized by going through __init_single_page(). Since
>
Correct, the pgflags asserts were triggered when we were setting reserved
flags to struct page for PFN 0 in which was never initialized through
__init_single_page(). The reason they were triggered is because we set all
uninitialized memory to ones in one of the debug patches.
And why don't we
Correct, the pgflags asserts were triggered when we were setting reserved
flags to struct page for PFN 0 in which was never initialized through
__init_single_page(). The reason they were triggered is because we set all
uninitialized memory to ones in one of the debug patches.
And why don't we
On Fri 11-08-17 11:24:55, Pasha Tatashin wrote:
[...]
> >>In this patchset we will stop zeroing struct page memory during allocation.
> >>Therefore, this bug must be fixed in order to avoid random assert failures
> >>caused by CONFIG_DEBUG_VM_PGFLAGS triggers.
> >>
> >>The fix is to reserve memory
On Fri 11-08-17 11:24:55, Pasha Tatashin wrote:
[...]
> >>In this patchset we will stop zeroing struct page memory during allocation.
> >>Therefore, this bug must be fixed in order to avoid random assert failures
> >>caused by CONFIG_DEBUG_VM_PGFLAGS triggers.
> >>
> >>The fix is to reserve memory
Struct pages are initialized by going through __init_single_page(). Since
the existing physical memory in memblock is represented in memblock.memory
list, struct page for every page from this list goes through
__init_single_page().
By a page _from_ this list you mean struct pages backing the
Struct pages are initialized by going through __init_single_page(). Since
the existing physical memory in memblock is represented in memblock.memory
list, struct page for every page from this list goes through
__init_single_page().
By a page _from_ this list you mean struct pages backing the
On Mon 07-08-17 16:38:35, Pavel Tatashin wrote:
> Struct pages are initialized by going through __init_single_page(). Since
> the existing physical memory in memblock is represented in memblock.memory
> list, struct page for every page from this list goes through
> __init_single_page().
By a page
On Mon 07-08-17 16:38:35, Pavel Tatashin wrote:
> Struct pages are initialized by going through __init_single_page(). Since
> the existing physical memory in memblock is represented in memblock.memory
> list, struct page for every page from this list goes through
> __init_single_page().
By a page
Struct pages are initialized by going through __init_single_page(). Since
the existing physical memory in memblock is represented in memblock.memory
list, struct page for every page from this list goes through
__init_single_page().
The second memblock list: memblock.reserved, manages the
Struct pages are initialized by going through __init_single_page(). Since
the existing physical memory in memblock is represented in memblock.memory
list, struct page for every page from this list goes through
__init_single_page().
The second memblock list: memblock.reserved, manages the
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