From: Kees Cook <keescook@chromium.org>
To: Suren Baghdasaryan <surenb@google.com>
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Subject: Re: [PATCH v6 00/37] Memory allocation profiling
Date: Wed, 24 Apr 2024 18:59:01 -0700 [thread overview]
Message-ID: <202404241852.DC4067B7@keescook> (raw)
In-Reply-To: <20240321163705.3067592-1-surenb@google.com>
On Thu, Mar 21, 2024 at 09:36:22AM -0700, Suren Baghdasaryan wrote:
> Low overhead [1] per-callsite memory allocation profiling. Not just for
> debug kernels, overhead low enough to be deployed in production.
Okay, I think I'm holding it wrong. With next-20240424 if I set:
CONFIG_CODE_TAGGING=y
CONFIG_MEM_ALLOC_PROFILING=y
CONFIG_MEM_ALLOC_PROFILING_ENABLED_BY_DEFAULT=y
My test system totally freaks out:
...
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
Oops: general protection fault, probably for non-canonical address 0xc388d881e4808550: 0000 [#1] PREEMPT SMP NOPTI
CPU: 0 PID: 0 Comm: swapper Not tainted 6.9.0-rc5-next-20240424 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015
RIP: 0010:__kmalloc_node_noprof+0xcd/0x560
Which is:
__kmalloc_node_noprof+0xcd/0x560:
__slab_alloc_node at mm/slub.c:3780 (discriminator 2)
(inlined by) slab_alloc_node at mm/slub.c:3982 (discriminator 2)
(inlined by) __do_kmalloc_node at mm/slub.c:4114 (discriminator 2)
(inlined by) __kmalloc_node_noprof at mm/slub.c:4122 (discriminator 2)
Which is:
tid = READ_ONCE(c->tid);
I haven't gotten any further than that; I'm EOD. Anyone seen anything
like this with this series?
-Kees
--
Kees Cook
next prev parent reply other threads:[~2024-04-25 1:59 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-21 16:36 [PATCH v6 00/37] Memory allocation profiling Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 01/37] fix missing vmalloc.h includes Suren Baghdasaryan
2024-04-03 21:12 ` Nathan Chancellor
2024-04-03 21:41 ` Kent Overstreet
2024-04-03 21:48 ` David Hildenbrand
2024-04-03 22:57 ` Kent Overstreet
2024-04-04 2:55 ` Randy Dunlap
2024-03-21 16:36 ` [PATCH v6 02/37] asm-generic/io.h: Kill vmalloc.h dependency Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 03/37] mm/slub: Mark slab_free_freelist_hook() __always_inline Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 04/37] scripts/kallysms: Always include __start and __stop symbols Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 05/37] fs: Convert alloc_inode_sb() to a macro Suren Baghdasaryan
2024-03-21 20:31 ` Andrew Morton
2024-03-21 21:13 ` Suren Baghdasaryan
2024-03-21 21:15 ` Kent Overstreet
2024-03-21 22:09 ` Andrew Morton
2024-03-21 22:17 ` Kent Overstreet
2024-03-21 22:47 ` Suren Baghdasaryan
2024-04-04 16:57 ` Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 06/37] mm: introduce slabobj_ext to support slab object extensions Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 07/37] mm: introduce __GFP_NO_OBJ_EXT flag to selectively prevent slabobj_ext creation Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 08/37] mm/slab: introduce SLAB_NO_OBJ_EXT to avoid obj_ext creation Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 09/37] slab: objext: introduce objext_flags as extension to page_memcg_data_flags Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 10/37] lib: code tagging framework Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 11/37] lib: code tagging module support Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 12/37] lib: prevent module unloading if memory is not freed Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 13/37] lib: add allocation tagging support for memory allocation profiling Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 14/37] lib: introduce support for page allocation tagging Suren Baghdasaryan
2024-03-26 3:12 ` Matthew Wilcox
2024-03-26 6:23 ` Suren Baghdasaryan
2024-03-27 3:24 ` Matthew Wilcox
2024-03-27 5:30 ` Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 15/37] lib: introduce early boot parameter to avoid page_ext memory overhead Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 16/37] mm: percpu: increase PERCPU_MODULE_RESERVE to accommodate allocation tags Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 17/37] change alloc_pages name in dma_map_ops to avoid name conflicts Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 18/37] mm: enable page allocation tagging Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 19/37] mm: create new codetag references during page splitting Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 20/37] mm: fix non-compound multi-order memory accounting in __free_pages Suren Baghdasaryan
2024-03-21 16:48 ` Matthew Wilcox
2024-03-21 17:04 ` Matthew Wilcox
2024-03-21 17:19 ` Suren Baghdasaryan
2024-03-21 17:22 ` Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 21/37] mm/page_ext: enable early_page_ext when CONFIG_MEM_ALLOC_PROFILING_DEBUG=y Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 22/37] lib: add codetag reference into slabobj_ext Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 23/37] mm/slab: add allocation accounting into slab allocation and free paths Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 24/37] rust: Add a rust helper for krealloc() Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 25/37] mm/slab: enable slab allocation tagging for kmalloc and friends Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 26/37] mempool: Hook up to memory allocation profiling Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 27/37] mm: percpu: Introduce pcpuobj_ext Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 28/37] mm: percpu: Add codetag reference into pcpuobj_ext Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 29/37] mm: percpu: enable per-cpu allocation tagging Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 30/37] mm: vmalloc: Enable memory allocation profiling Suren Baghdasaryan
2024-03-23 18:05 ` SeongJae Park
2024-03-25 14:56 ` Suren Baghdasaryan
2024-03-25 17:49 ` SeongJae Park
2024-03-25 17:59 ` Suren Baghdasaryan
2024-03-25 18:20 ` SeongJae Park
2024-03-26 7:51 ` Suren Baghdasaryan
2024-03-26 15:39 ` SeongJae Park
2024-04-16 19:27 ` Sourav Panda
2024-03-21 16:36 ` [PATCH v6 31/37] rhashtable: Plumb through alloc tag Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 32/37] lib: add memory allocations report in show_mem() Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 33/37] codetag: debug: skip objext checking when it's for objext itself Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 34/37] codetag: debug: mark codetags for reserved pages as empty Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 35/37] codetag: debug: introduce OBJEXTS_ALLOC_FAIL to mark failed slab_ext allocations Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 36/37] MAINTAINERS: Add entries for code tagging and memory allocation profiling Suren Baghdasaryan
2024-03-21 16:36 ` [PATCH v6 37/37] memprofiling: Documentation Suren Baghdasaryan
2024-03-21 20:41 ` [PATCH v6 00/37] Memory allocation profiling Andrew Morton
2024-03-21 21:08 ` Suren Baghdasaryan
2024-04-05 13:37 ` Klara Modin
2024-04-05 14:14 ` Suren Baghdasaryan
2024-04-05 14:30 ` Klara Modin
2024-04-05 15:20 ` Suren Baghdasaryan
2024-04-05 15:37 ` Klara Modin
2024-04-06 21:42 ` Suren Baghdasaryan
2024-04-25 1:59 ` Kees Cook [this message]
2024-04-25 3:25 ` Kent Overstreet
2024-04-25 15:39 ` Suren Baghdasaryan
2024-04-25 20:00 ` Kees Cook
2024-04-25 21:35 ` Suren Baghdasaryan
2024-04-25 20:08 ` Kees Cook
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