Re: [PATCH v3 31/40] mm/vma: introduce vma[_flags]_is_persistent()
From: "David Hildenbrand (Arm)" <david@kernel.org>
Date: 2026-10-02 07:03:08
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bpf, fuse-devel, kvm, kvm-riscv, kvmarm, linux-arch, linux-doc, linux-fbdev, linux-fsdevel, linux-mm, linux-perf-users, linux-rdma, linux-s390, linux-scsi, linux-sound, linux-trace-kernel, linux-usb, lkml, selinux, sparclinux
On 10/2/26 08:59, David Hildenbrand (Arm) wrote:
On 9/17/26 18:22, Lorenzo Stoakes (ARM) wrote:quoted
Introduce vma[_flags]_is_persistent() for the purposes of identifying mappings that are persistent in the sense that bytes to the mapping stay there, and bytes read from the mapping are the same unless changed by actions taken by userland.That's extremely confusing, sorry. We have to find a better name for that. Is this really all about user pages (pagecache, anon) that we would find through the rmap?
It's also about droppable mappings AFAIKs. How many more users will we have for that function? If it's "no others" then please don't add a helper function with misleading names for it and just keep the special "dumpable" check in the new form in madvise_vma_behavior(). -- Cheers, David