From: Suren Baghdasaryan <surenb@google.com>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: Kent Overstreet <kent.overstreet@linux.dev>,
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Subject: Re: [PATCH v3 07/35] mm/slab: introduce SLAB_NO_OBJ_EXT to avoid obj_ext creation
Date: Thu, 15 Feb 2024 14:10:09 -0800 [thread overview]
Message-ID: <CAJuCfpH=tr1faWnn0CZ=V_Gg-0ysEsGPOje5U-DDy5x2V83pxA@mail.gmail.com> (raw)
In-Reply-To: <ab4b1789-910a-4cd6-802c-5012bf9d8984@suse.cz>
On Thu, Feb 15, 2024 at 1:50 PM Vlastimil Babka <vbabka@suse.cz> wrote:
>
> On 2/15/24 22:37, Kent Overstreet wrote:
> > On Thu, Feb 15, 2024 at 10:31:06PM +0100, Vlastimil Babka wrote:
> >> On 2/12/24 22:38, Suren Baghdasaryan wrote:
> >> > Slab extension objects can't be allocated before slab infrastructure is
> >> > initialized. Some caches, like kmem_cache and kmem_cache_node, are created
> >> > before slab infrastructure is initialized. Objects from these caches can't
> >> > have extension objects. Introduce SLAB_NO_OBJ_EXT slab flag to mark these
> >> > caches and avoid creating extensions for objects allocated from these
> >> > slabs.
> >> >
> >> > Signed-off-by: Suren Baghdasaryan <surenb@google.com>
> >> > ---
> >> > include/linux/slab.h | 7 +++++++
> >> > mm/slub.c | 5 +++--
> >> > 2 files changed, 10 insertions(+), 2 deletions(-)
> >> >
> >> > diff --git a/include/linux/slab.h b/include/linux/slab.h
> >> > index b5f5ee8308d0..3ac2fc830f0f 100644
> >> > --- a/include/linux/slab.h
> >> > +++ b/include/linux/slab.h
> >> > @@ -164,6 +164,13 @@
> >> > #endif
> >> > #define SLAB_TEMPORARY SLAB_RECLAIM_ACCOUNT /* Objects are short-lived */
> >> >
> >> > +#ifdef CONFIG_SLAB_OBJ_EXT
> >> > +/* Slab created using create_boot_cache */
> >> > +#define SLAB_NO_OBJ_EXT ((slab_flags_t __force)0x20000000U)
> >>
> >> There's
> >> #define SLAB_SKIP_KFENCE ((slab_flags_t __force)0x20000000U)
> >> already, so need some other one?
Indeed. I somehow missed it. Thanks for noticing, will fix this in the
next version.
> >
> > What's up with the order of flags in that file? They don't seem to
> > follow any particular ordering.
>
> Seems mostly in increasing order, except commit 4fd0b46e89879 broke it for
> SLAB_RECLAIM_ACCOUNT?
>
> > Seems like some cleanup is in order, but any history/context we should
> > know first?
>
> Yeah noted, but no need to sidetrack you.
next prev parent reply other threads:[~2024-02-15 22:10 UTC|newest]
Thread overview: 208+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-12 21:38 [PATCH v3 00/35] Memory allocation profiling Suren Baghdasaryan
2024-02-12 21:38 ` [PATCH v3 01/35] lib/string_helpers: Add flags param to string_get_size() Suren Baghdasaryan
2024-02-12 22:09 ` Kees Cook
2024-02-13 8:26 ` Andy Shevchenko
2024-02-13 8:29 ` Andy Shevchenko
2024-02-13 23:55 ` Kent Overstreet
2024-02-13 22:06 ` Kent Overstreet
2024-02-29 20:54 ` Andy Shevchenko
2024-02-14 20:11 ` Matthew Wilcox
2024-02-12 21:38 ` [PATCH v3 02/35] scripts/kallysms: Always include __start and __stop symbols Suren Baghdasaryan
2024-02-12 22:06 ` Kees Cook
2024-02-12 21:38 ` [PATCH v3 03/35] fs: Convert alloc_inode_sb() to a macro Suren Baghdasaryan
2024-02-12 22:07 ` Kees Cook
2024-02-12 21:38 ` [PATCH v3 04/35] mm: enumerate all gfp flags Suren Baghdasaryan
2024-02-12 22:10 ` Kees Cook
2024-02-12 21:38 ` [PATCH v3 05/35] mm: introduce slabobj_ext to support slab object extensions Suren Baghdasaryan
2024-02-12 22:14 ` Kees Cook
2024-02-13 2:20 ` Suren Baghdasaryan
2024-02-14 17:59 ` Vlastimil Babka
2024-02-14 19:19 ` Suren Baghdasaryan
2024-02-12 21:38 ` [PATCH v3 06/35] mm: introduce __GFP_NO_OBJ_EXT flag to selectively prevent slabobj_ext creation Suren Baghdasaryan
2024-02-12 22:14 ` Kees Cook
2024-02-12 21:38 ` [PATCH v3 07/35] mm/slab: introduce SLAB_NO_OBJ_EXT to avoid obj_ext creation Suren Baghdasaryan
2024-02-12 22:14 ` Kees Cook
2024-02-15 21:31 ` Vlastimil Babka
2024-02-15 21:37 ` Kent Overstreet
2024-02-15 21:50 ` Vlastimil Babka
2024-02-15 22:10 ` Suren Baghdasaryan [this message]
2024-02-16 18:41 ` Suren Baghdasaryan
2024-02-16 18:49 ` Vlastimil Babka
2024-02-12 21:38 ` [PATCH v3 08/35] mm: prevent slabobj_ext allocations for slabobj_ext and kmem_cache objects Suren Baghdasaryan
2024-02-12 22:15 ` Kees Cook
2024-02-15 21:44 ` Vlastimil Babka
2024-02-15 22:13 ` Suren Baghdasaryan
2024-02-12 21:38 ` [PATCH v3 09/35] slab: objext: introduce objext_flags as extension to page_memcg_data_flags Suren Baghdasaryan
2024-02-12 22:15 ` Kees Cook
2024-02-12 21:38 ` [PATCH v3 10/35] lib: code tagging framework Suren Baghdasaryan
2024-02-12 22:27 ` Kees Cook
2024-02-13 2:04 ` Suren Baghdasaryan
2024-02-16 7:22 ` Suren Baghdasaryan
2024-02-12 21:38 ` [PATCH v3 11/35] lib: code tagging module support Suren Baghdasaryan
2024-02-12 21:38 ` [PATCH v3 12/35] lib: prevent module unloading if memory is not freed Suren Baghdasaryan
2024-02-12 21:38 ` [PATCH v3 13/35] lib: add allocation tagging support for memory allocation profiling Suren Baghdasaryan
2024-02-12 22:40 ` Kees Cook
2024-02-13 1:01 ` Suren Baghdasaryan
2024-02-13 22:28 ` Darrick J. Wong
2024-02-13 22:35 ` Suren Baghdasaryan
2024-02-13 22:38 ` Kees Cook
2024-02-13 22:47 ` Steven Rostedt
2024-02-16 8:50 ` Vlastimil Babka
2024-02-16 8:55 ` Suren Baghdasaryan
2024-02-16 23:26 ` Kent Overstreet
2024-02-17 0:08 ` Kees Cook
2024-02-16 0:54 ` Andrew Morton
2024-02-16 1:00 ` Kent Overstreet
2024-02-16 1:22 ` Pasha Tatashin
2024-02-16 1:27 ` Kent Overstreet
2024-02-16 9:02 ` Suren Baghdasaryan
2024-02-16 9:03 ` Suren Baghdasaryan
2024-02-16 17:18 ` Pasha Tatashin
2024-02-17 20:10 ` Kent Overstreet
2024-02-16 8:57 ` Vlastimil Babka
2024-02-18 2:21 ` Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 14/35] lib: introduce support for page allocation tagging Suren Baghdasaryan
2024-02-16 9:45 ` Vlastimil Babka
2024-02-16 16:44 ` Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 15/35] mm: percpu: increase PERCPU_MODULE_RESERVE to accommodate allocation tags Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 16/35] change alloc_pages name in dma_map_ops to avoid name conflicts Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 17/35] mm: enable page allocation tagging Suren Baghdasaryan
2024-02-12 22:59 ` Kees Cook
2024-02-12 21:39 ` [PATCH v3 18/35] mm: create new codetag references during page splitting Suren Baghdasaryan
2024-02-16 14:33 ` Vlastimil Babka
2024-02-16 16:46 ` Suren Baghdasaryan
2024-02-18 0:44 ` Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 19/35] mm/page_ext: enable early_page_ext when CONFIG_MEM_ALLOC_PROFILING_DEBUG=y Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 20/35] lib: add codetag reference into slabobj_ext Suren Baghdasaryan
2024-02-16 15:36 ` Vlastimil Babka
2024-02-16 17:04 ` Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 21/35] mm/slab: add allocation accounting into slab allocation and free paths Suren Baghdasaryan
2024-02-12 22:59 ` Kees Cook
2024-02-16 16:31 ` Vlastimil Babka
2024-02-16 16:38 ` Kent Overstreet
2024-02-16 17:11 ` Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 22/35] mm/slab: enable slab allocation tagging for kmalloc and friends Suren Baghdasaryan
2024-02-12 23:01 ` Kees Cook
2024-02-16 16:52 ` Vlastimil Babka
2024-02-16 17:03 ` Kent Overstreet
2024-02-12 21:39 ` [PATCH v3 23/35] mm/slub: Mark slab_free_freelist_hook() __always_inline Suren Baghdasaryan
2024-02-13 0:31 ` Kees Cook
2024-02-13 0:34 ` Suren Baghdasaryan
2024-02-13 2:08 ` Kent Overstreet
2024-02-14 15:13 ` Vlastimil Babka
2024-02-15 4:04 ` Liam R. Howlett
2024-02-12 21:39 ` [PATCH v3 24/35] mempool: Hook up to memory allocation profiling Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 25/35] xfs: Memory allocation profiling fixups Suren Baghdasaryan
2024-02-14 22:22 ` Dave Chinner
2024-02-14 22:36 ` Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 26/35] mm: percpu: Introduce pcpuobj_ext Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 27/35] mm: percpu: Add codetag reference into pcpuobj_ext Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 28/35] mm: percpu: enable per-cpu allocation tagging Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 29/35] mm: vmalloc: Enable memory allocation profiling Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 30/35] rhashtable: Plumb through alloc tag Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 31/35] lib: add memory allocations report in show_mem() Suren Baghdasaryan
2024-02-13 0:10 ` Kees Cook
2024-02-13 0:22 ` Steven Rostedt
2024-02-13 4:33 ` Kent Overstreet
2024-02-13 8:17 ` Suren Baghdasaryan
2024-02-15 9:22 ` Michal Hocko
2024-02-15 14:58 ` Suren Baghdasaryan
2024-02-15 16:44 ` Michal Hocko
2024-02-15 16:47 ` Suren Baghdasaryan
2024-02-15 18:29 ` Kent Overstreet
2024-02-15 18:33 ` Suren Baghdasaryan
2024-02-15 18:38 ` Kent Overstreet
2024-02-15 18:41 ` Michal Hocko
2024-02-15 18:49 ` Suren Baghdasaryan
2024-02-15 20:22 ` Vlastimil Babka
2024-02-15 20:33 ` Kent Overstreet
2024-02-15 21:54 ` Michal Hocko
2024-02-15 22:54 ` Kent Overstreet
2024-02-15 23:07 ` Steven Rostedt
2024-02-15 23:16 ` Steven Rostedt
2024-02-15 23:27 ` Steven Rostedt
2024-02-15 23:56 ` Kent Overstreet
2024-02-19 17:17 ` Suren Baghdasaryan
2024-02-20 16:23 ` Michal Hocko
2024-02-20 17:18 ` Kent Overstreet
2024-02-20 17:24 ` Michal Hocko
2024-02-20 17:32 ` Kent Overstreet
2024-02-20 18:27 ` Vlastimil Babka
2024-02-20 20:59 ` Suren Baghdasaryan
2024-02-21 13:21 ` Tetsuo Handa
2024-02-21 18:26 ` Suren Baghdasaryan
2024-02-15 23:19 ` Dave Hansen
2024-02-15 23:54 ` Kent Overstreet
2024-02-15 23:51 ` Kent Overstreet
2024-02-16 0:21 ` Steven Rostedt
2024-02-16 0:32 ` Kent Overstreet
2024-02-16 0:39 ` Steven Rostedt
2024-02-16 0:50 ` Kent Overstreet
2024-02-16 1:12 ` Steven Rostedt
2024-02-16 1:18 ` Kent Overstreet
2024-02-16 1:31 ` Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 32/35] codetag: debug: skip objext checking when it's for objext itself Suren Baghdasaryan
2024-02-16 18:39 ` Vlastimil Babka
2024-02-19 1:04 ` Suren Baghdasaryan
2024-02-19 9:17 ` Vlastimil Babka
2024-02-19 16:55 ` Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 33/35] codetag: debug: mark codetags for reserved pages as empty Suren Baghdasaryan
2024-02-12 22:45 ` Kees Cook
2024-02-13 0:15 ` Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 34/35] codetag: debug: introduce OBJEXTS_ALLOC_FAIL to mark failed slab_ext allocations Suren Baghdasaryan
2024-02-12 22:49 ` Kees Cook
2024-02-13 0:09 ` Suren Baghdasaryan
2024-02-12 21:39 ` [PATCH v3 35/35] MAINTAINERS: Add entries for code tagging and memory allocation profiling Suren Baghdasaryan
2024-02-12 22:43 ` Kees Cook
2024-02-13 0:33 ` Suren Baghdasaryan
2024-02-13 0:14 ` [PATCH v3 00/35] Memory " Pasha Tatashin
2024-02-13 0:29 ` Kees Cook
2024-02-13 0:47 ` Suren Baghdasaryan
2024-02-13 12:24 ` Michal Hocko
2024-02-13 21:58 ` Suren Baghdasaryan
2024-02-13 22:04 ` David Hildenbrand
2024-02-13 22:09 ` Kent Overstreet
2024-02-13 22:17 ` David Hildenbrand
2024-02-13 22:29 ` Kent Overstreet
2024-02-13 23:11 ` Darrick J. Wong
2024-02-13 23:24 ` Kent Overstreet
2024-02-13 22:30 ` Suren Baghdasaryan
2024-02-13 22:48 ` David Hildenbrand
2024-02-13 22:50 ` Kent Overstreet
2024-02-13 22:57 ` David Hildenbrand
2024-02-13 22:59 ` Suren Baghdasaryan
2024-02-13 23:02 ` David Hildenbrand
2024-02-13 23:12 ` Kent Overstreet
2024-02-13 23:22 ` David Hildenbrand
2024-02-13 23:28 ` Suren Baghdasaryan
2024-02-13 23:54 ` Pasha Tatashin
2024-02-14 0:04 ` Kent Overstreet
2024-02-14 10:01 ` David Hildenbrand
2024-02-13 23:08 ` Kent Overstreet
2024-02-14 10:20 ` Vlastimil Babka
2024-02-14 16:38 ` Kent Overstreet
2024-02-14 15:00 ` Matthew Wilcox
2024-02-14 15:13 ` Kent Overstreet
2024-02-14 13:23 ` Michal Hocko
2024-02-14 16:55 ` Andrew Morton
2024-02-14 17:14 ` Suren Baghdasaryan
2024-02-14 17:52 ` Kent Overstreet
2024-02-14 19:24 ` Suren Baghdasaryan
2024-02-14 20:00 ` Kent Overstreet
2024-02-14 6:20 ` Johannes Weiner
2024-02-14 14:46 ` Michal Hocko
2024-02-14 15:01 ` Kent Overstreet
2024-02-14 16:02 ` Michal Hocko
2024-02-14 16:17 ` Kent Overstreet
2024-02-14 16:31 ` Michal Hocko
2024-02-14 17:14 ` Suren Baghdasaryan
2024-02-14 18:44 ` Andy Shevchenko
2024-02-14 18:51 ` Suren Baghdasaryan
2024-02-14 18:53 ` Tim Chen
2024-02-14 19:09 ` Suren Baghdasaryan
2024-02-14 20:17 ` Yosry Ahmed
2024-02-14 20:30 ` Suren Baghdasaryan
2024-02-14 22:59 ` Tim Chen
2024-02-16 8:38 ` Jani Nikula
2024-02-16 8:42 ` Kent Overstreet
2024-02-16 9:07 ` Jani Nikula
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