On Fri, 26 Mar 2021 19:17:20 +, Dmitry Safonov wrote:
> Since commit 511157ab641e ("powerpc/vdso: Move vdso datapage up front")
> VVAR page is in front of the VDSO area. In result it breaks CRIU
> (Checkpoint Restore In Userspace) [1], where CRIU expects that "[vdso]"
> from /proc/../maps point
On 3/31/21 10:59 AM, Michael Ellerman wrote:
> Christophe Leroy writes:
[..]
>>
>>> @@ -133,7 +135,13 @@ static int __arch_setup_additional_pages(struct
>>> linux_binprm *bprm, int uses_int
>>> * install_special_mapping or the perf counter mmap tracking code
>>> * will fail to recognise
On 3/30/21 11:17 AM, Christophe Leroy wrote:
>
>
> Le 26/03/2021 à 20:17, Dmitry Safonov a écrit :
[..]
>> --- a/arch/powerpc/kernel/vdso.c
>> +++ b/arch/powerpc/kernel/vdso.c
>> @@ -55,10 +55,10 @@ static int vdso_mremap(const struct
>> vm_special_mapping *sm, struct vm_area_struc
>> {
>>
Christophe Leroy writes:
> Le 26/03/2021 à 20:17, Dmitry Safonov a écrit :
>> Since commit 511157ab641e ("powerpc/vdso: Move vdso datapage up front")
>> VVAR page is in front of the VDSO area. In result it breaks CRIU
>> (Checkpoint Restore In Userspace) [1], where CRIU expects that "[vdso]"
>> fr
Le 26/03/2021 à 20:17, Dmitry Safonov a écrit :
Since commit 511157ab641e ("powerpc/vdso: Move vdso datapage up front")
VVAR page is in front of the VDSO area. In result it breaks CRIU
(Checkpoint Restore In Userspace) [1], where CRIU expects that "[vdso]"
from /proc/../maps points at ELF/vdso
Le 26/03/2021 à 20:17, Dmitry Safonov a écrit :
Since commit 511157ab641e ("powerpc/vdso: Move vdso datapage up front")
VVAR page is in front of the VDSO area. In result it breaks CRIU
(Checkpoint Restore In Userspace) [1], where CRIU expects that "[vdso]"
from /proc/../maps points at ELF/vdso
On 3/29/21 4:14 PM, Laurent Dufour wrote:
> Le 26/03/2021 à 20:17, Dmitry Safonov a écrit :
>> Since commit 511157ab641e ("powerpc/vdso: Move vdso datapage up front")
>> VVAR page is in front of the VDSO area. In result it breaks CRIU
>> (Checkpoint Restore In Userspace) [1], where CRIU expects tha
Le 26/03/2021 à 20:17, Dmitry Safonov a écrit :
Since commit 511157ab641e ("powerpc/vdso: Move vdso datapage up front")
VVAR page is in front of the VDSO area. In result it breaks CRIU
(Checkpoint Restore In Userspace) [1], where CRIU expects that "[vdso]"
from /proc/../maps points at ELF/vdso im
Hi Christophe and Dimitry,
Le 27/03/2021 à 18:43, Dmitry Safonov a écrit :
Hi Christophe,
On 3/27/21 5:19 PM, Christophe Leroy wrote:
[..]
I opportunistically Cc stable on it: I understand that usually such
stuff isn't a stable material, but that will allow us in CRIU have
one workaround less
Hi Christophe,
On 3/27/21 5:19 PM, Christophe Leroy wrote:
[..]
>> I opportunistically Cc stable on it: I understand that usually such
>> stuff isn't a stable material, but that will allow us in CRIU have
>> one workaround less that is needed just for one release (v5.11) on
>> one platform (ppc64)
Le 26/03/2021 à 20:17, Dmitry Safonov a écrit :
Since commit 511157ab641e ("powerpc/vdso: Move vdso datapage up front")
VVAR page is in front of the VDSO area. In result it breaks CRIU
(Checkpoint Restore In Userspace) [1], where CRIU expects that "[vdso]"
from /proc/../maps points at ELF/vdso
Since commit 511157ab641e ("powerpc/vdso: Move vdso datapage up front")
VVAR page is in front of the VDSO area. In result it breaks CRIU
(Checkpoint Restore In Userspace) [1], where CRIU expects that "[vdso]"
from /proc/../maps points at ELF/vdso image, rather than at VVAR data page.
Laurent made a
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