On Tuesday 28 March 2017 04:47 PM, Michael Ellerman wrote:
"Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx> writes:
As we start supporting larger address space (>128TB), we want to give
architecture a control on max task size of an application which is different
from the TASK_SIZE. For ex: ppc64 needs to track the base page size of a segment
and it is copied from mm_context_t to PACA on each context switch. If we know that
application has not used an address range above 128TB we only need to copy
details about 128TB range to PACA. This will help in improving context switch
performance by avoiding larger copy operation.
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
---
fs/exec.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
I'll need an ACK at least on this from someone in mm land.
I assume there's no way I can merge patch 17 without this?
That is correct.
I didn't add linux-mm to cc for rest of the patches. They are all ppc64
specific and can be found at
https://lists.ozlabs.org/pipermail/linuxppc-dev/2017-March/155726.html
-aneesh
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