Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map... | linux-arm-kernel

[PATCH v16 00/11] mm: introduce memfd_secret system call to create "secret" memory areas · Mike Rapoport <rppt@kernel.org> · 2021-01-21
[PATCH v16 01/11] mm: add definition of PMD_PAGE_ORDER · Mike Rapoport <rppt@kernel.org> · 2021-01-21
[PATCH v16 02/11] mmap: make mlock_future_check() global · Mike Rapoport <rppt@kernel.org> · 2021-01-21
[PATCH v16 08/11] secretmem: add memcg accounting · Mike Rapoport <rppt@kernel.org> · 2021-01-21
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Michal Hocko <mhocko@suse.com> · 2021-01-25
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Mike Rapoport <rppt@kernel.org> · 2021-01-25
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Matthew Wilcox <willy@infradead.org> · 2021-01-26
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Michal Hocko <mhocko@suse.com> · 2021-01-26
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Roman Gushchin <hidden> · 2021-01-27
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Michal Hocko <mhocko@suse.com> · 2021-01-28
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Shakeel Butt <hidden> · 2021-01-28
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Michal Hocko <mhocko@suse.com> · 2021-01-28
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Shakeel Butt <hidden> · 2021-01-28
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Michal Hocko <mhocko@suse.com> · 2021-01-26
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Mike Rapoport <rppt@kernel.org> · 2021-01-26
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Michal Hocko <mhocko@suse.com> · 2021-01-26
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Matthew Wilcox <willy@infradead.org> · 2021-01-26
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Shakeel Butt <hidden> · 2021-01-25
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Mike Rapoport <rppt@kernel.org> · 2021-01-25
Re: [PATCH v16 08/11] secretmem: add memcg accounting · Shakeel Butt <hidden> · 2021-01-28
[PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Mike Rapoport <rppt@kernel.org> · 2021-01-21
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-01-26
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · David Hildenbrand <hidden> · 2021-01-26
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-01-26
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Mike Rapoport <rppt@kernel.org> · 2021-01-28
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-01-28
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Christoph Lameter <hidden> · 2021-01-28
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-01-28
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Christoph Lameter <hidden> · 2021-01-28
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-01-28
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · James Bottomley <hidden> · 2021-01-28
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Mike Rapoport <rppt@kernel.org> · 2021-01-29
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · James Bottomley <hidden> · 2021-01-28
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-01-29
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-01-29
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · James Bottomley <hidden> · 2021-02-01
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-02-02
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Mike Rapoport <rppt@kernel.org> · 2021-02-02
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · David Hildenbrand <hidden> · 2021-02-02
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-02-02
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · David Hildenbrand <hidden> · 2021-02-02
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-02-02
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · David Hildenbrand <hidden> · 2021-02-02
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-02-02
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · David Hildenbrand <hidden> · 2021-02-02
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Mike Rapoport <rppt@kernel.org> · 2021-02-02
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · James Bottomley <hidden> · 2021-02-02
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-02-03
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Mike Rapoport <rppt@kernel.org> · 2021-02-04
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-02-02
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Mike Rapoport <rppt@kernel.org> · 2021-02-02
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-02-03
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Mike Rapoport <rppt@kernel.org> · 2021-02-04
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-02-04
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Mike Rapoport <rppt@kernel.org> · 2021-01-29
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · Michal Hocko <mhocko@suse.com> · 2021-01-29
Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation · David Hildenbrand <hidden> · 2021-02-02
[PATCH v16 11/11] secretmem: test: add basic selftest for memfd_secret(2) · Mike Rapoport <rppt@kernel.org> · 2021-01-21
[PATCH v16 10/11] arch, mm: wire up memfd_secret system call where relevant · Mike Rapoport <rppt@kernel.org> · 2021-01-21
Re: [PATCH v16 10/11] arch, mm: wire up memfd_secret system call where relevant · Catalin Marinas <catalin.marinas@arm.com> · 2021-01-25
[PATCH v16 09/11] PM: hibernate: disable when there are active secretmem users · Mike Rapoport <rppt@kernel.org> · 2021-01-21
[PATCH v16 05/11] set_memory: allow querying whether set_direct_map_*() is actually enabled · Mike Rapoport <rppt@kernel.org> · 2021-01-21
[PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas · Mike Rapoport <rppt@kernel.org> · 2021-01-21
Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas · Michal Hocko <mhocko@suse.com> · 2021-01-25
Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas · Mike Rapoport <rppt@kernel.org> · 2021-01-25
Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas · Michal Hocko <mhocko@suse.com> · 2021-01-26
Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas · Mike Rapoport <rppt@kernel.org> · 2021-01-26
Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas · Michal Hocko <mhocko@suse.com> · 2021-01-26
Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas · Mike Rapoport <rppt@kernel.org> · 2021-01-26
Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas · Michal Hocko <mhocko@suse.com> · 2021-01-26
Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas · David Hildenbrand <hidden> · 2021-01-26
Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas · Michal Hocko <mhocko@suse.com> · 2021-01-26
Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas · Michal Hocko <mhocko@suse.com> · 2021-01-26
Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas · Michal Hocko <mhocko@suse.com> · 2021-02-03
Re: [PATCH v16 06/11] mm: introduce memfd_secret system call to create "secret" memory areas · Mike Rapoport <rppt@kernel.org> · 2021-02-04
[PATCH v16 03/11] riscv/Kconfig: make direct map manipulation options depend on MMU · Mike Rapoport <rppt@kernel.org> · 2021-01-21
[PATCH v16 04/11] set_memory: allow set_direct_map_*_noflush() for multiple pages · Mike Rapoport <rppt@kernel.org> · 2021-01-21
Re: [PATCH v16 00/11] mm: introduce memfd_secret system call to create "secret" memory areas · Andrew Morton <akpm@linux-foundation.org> · 2021-01-21

Re: [PATCH v16 07/11] secretmem: use PMD-size pages to amortize direct map fragmentation

From: Michal Hocko <mhocko@suse.com>
Date: 2021-02-02 14:25:53
Also in: linux-api, linux-arch, linux-fsdevel, linux-kselftest, linux-mm, linux-riscv, lkml, nvdimm

On Tue 02-02-21 15:12:21, David Hildenbrand wrote:
[...]

I think secretmem behaves much more like longterm GUP right now
("unmigratable", "lifetime controlled by user space", "cannot go on
CMA/ZONE_MOVABLE"). I'd either want to reasonably well control/limit it or
make it behave more like mlocked pages.

I thought I have already asked but I must have forgotten. Is there any
actual reason why the memory is not movable? Timing attacks?
-- 
Michal Hocko
SUSE Labs

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