On 09.09.21 11:46, Huang Shijie wrote:
On Mon, Sep 06, 2021 at 11:35:01AM +0200, David Hildenbrand wrote:
On 06.09.21 18:16, Huang Shijie wrote:
This patch adds AT_NUMA_REPLICATION for execveat().
If this flag is set, the kernel will trigger COW(copy on write)
on the mmapped ELF binary. So the program will have a copied-page
on its NUMA node, even if the original page in page cache is
on other NUMA nodes.
Am I missing something important or is this just absolutely not what we
want?
Please see the thread:
https://marc.info/?l=linux-kernel&m=163070220429222&w=2
Linus did not think it is a good choice to implement the "per-numa node page cache"
That doesn't make this approach any better.
I don't think we want this in the kernel. If user space wants to waste
memory, it can happily mmap() however it wants. The advisory is to not
do it.
--
Thanks,
David / dhildenb
