Re: [PATCH v2 2/2] powerpc/mm: Tracking vDSO remap

2015-03-25 Thread Laurent Dufour
On 25/03/2015 13:11, Ingo Molnar wrote: * Laurent Dufour lduf...@linux.vnet.ibm.com wrote: Some processes (CRIU) are moving the vDSO area using the mremap system call. As a consequence the kernel reference to the vDSO base address is no more valid and the signal return frame built once the

Re: [PATCH v2 2/2] powerpc/mm: Tracking vDSO remap

2015-03-25 Thread Ingo Molnar
* Laurent Dufour lduf...@linux.vnet.ibm.com wrote: Some processes (CRIU) are moving the vDSO area using the mremap system call. As a consequence the kernel reference to the vDSO base address is no more valid and the signal return frame built once the vDSO has been moved is not pointing to

[PATCH v2 2/2] powerpc/mm: Tracking vDSO remap

2015-03-25 Thread Laurent Dufour
Some processes (CRIU) are moving the vDSO area using the mremap system call. As a consequence the kernel reference to the vDSO base address is no more valid and the signal return frame built once the vDSO has been moved is not pointing to the new sigreturn address. This patch handles vDSO