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Thu, 16 Oct 2025 17:26:25 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id BYuUCsEq8WgoLwAAD6G6ig (envelope-from ); Thu, 16 Oct 2025 17:26:25 +0000 Message-ID: <1ff90274-bc74-458a-8c73-7ac8d45e6198@suse.cz> Date: Thu, 16 Oct 2025 19:26:24 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [vbabka:b4/sheaves-for-all] [slab] de840681a1: BUG:using_smp_processor_id()in_preemptible Content-Language: en-US To: kernel test robot Cc: oe-lkp@lists.linux.dev, lkp@intel.com, linux-mm@kvack.org References: <202510161416.b7adda58-lkp@intel.com> From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSBWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmN6PsLBlAQTAQoAPgIbAwULCQgHAwUVCgkICwUWAgMBAAIe AQIXgBYhBKlA1DSZLC6OmRA9UCJPp+fMgqZkBQJnyBr8BQka0IFQAAoJECJPp+fMgqZkqmMQ AIbGN95ptUMUvo6aAdhxaOCHXp1DfIBuIOK/zpx8ylY4pOwu3GRe4dQ8u4XS9gaZ96Gj4bC+ jwWcSmn+TjtKW3rH1dRKopvC07tSJIGGVyw7ieV/5cbFffA8NL0ILowzVg8w1ipnz1VTkWDr 2zcfslxJsJ6vhXw5/npcY0ldeC1E8f6UUoa4eyoskd70vO0wOAoGd02ZkJoox3F5ODM0kjHu Y97VLOa3GG66lh+ZEelVZEujHfKceCw9G3PMvEzyLFbXvSOigZQMdKzQ8D/OChwqig8wFBmV QCPS4yDdmZP3oeDHRjJ9jvMUKoYODiNKsl2F+xXwyRM2qoKRqFlhCn4usVd1+wmv9iLV8nPs 2Db1ZIa49fJet3Sk3PN4bV1rAPuWvtbuTBN39Q/6MgkLTYHb84HyFKw14Rqe5YorrBLbF3rl M51Dpf6Egu1yTJDHCTEwePWug4XI11FT8lK0LNnHNpbhTCYRjX73iWOnFraJNcURld1jL1nV r/LRD+/e2gNtSTPK0Qkon6HcOBZnxRoqtazTU6YQRmGlT0v+rukj/cn5sToYibWLn+RoV1CE Qj6tApOiHBkpEsCzHGu+iDQ1WT0Idtdynst738f/uCeCMkdRu4WMZjteQaqvARFwCy3P/jpK uvzMtves5HvZw33ZwOtMCgbpce00DaET4y/UzsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZ8gcVAUJFhTonwAKCRAiT6fnzIKmZLY8D/9uo3Ut9yi2YCuASWxr7QQZ lJCViArjymbxYB5NdOeC50/0gnhK4pgdHlE2MdwF6o34x7TPFGpjNFvycZqccSQPJ/gibwNA zx3q9vJT4Vw+YbiyS53iSBLXMweeVV1Jd9IjAoL+EqB0cbxoFXvnjkvP1foiiF5r73jCd4PR rD+GoX5BZ7AZmFYmuJYBm28STM2NA6LhT0X+2su16f/HtummENKcMwom0hNu3MBNPUOrujtW khQrWcJNAAsy4yMoJ2Lw51T/5X5Hc7jQ9da9fyqu+phqlVtn70qpPvgWy4HRhr25fCAEXZDp xG4RNmTm+pqorHOqhBkI7wA7P/nyPo7ZEc3L+ZkQ37u0nlOyrjbNUniPGxPxv1imVq8IyycG AN5FaFxtiELK22gvudghLJaDiRBhn8/AhXc642/Z/yIpizE2xG4KU4AXzb6C+o7LX/WmmsWP Ly6jamSg6tvrdo4/e87lUedEqCtrp2o1xpn5zongf6cQkaLZKQcBQnPmgHO5OG8+50u88D9I rywqgzTUhHFKKF6/9L/lYtrNcHU8Z6Y4Ju/MLUiNYkmtrGIMnkjKCiRqlRrZE/v5YFHbayRD dJKXobXTtCBYpLJM4ZYRpGZXne/FAtWNe4KbNJJqxMvrTOrnIatPj8NhBVI0RSJRsbilh6TE m6M14QORSWTLRg== In-Reply-To: <202510161416.b7adda58-lkp@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: D3A9F10000C X-Stat-Signature: 6ch69177c4npjs57et6m4u3go96145p9 X-HE-Tag: 1760635586-77584 X-HE-Meta: U2FsdGVkX1/wEIosEvwfJ3/5bHb8xruXF3VAha7bnCBR5lScuzvKBDJeXA4zWqwTvugdfSg93N53yDYHzkBoM9YvLwFRQaiFhRhiSL2bNg+KqKlxYVVzCyxa8aMSwUsofNkaCT5Dk7nqng3Wq89/sr40nFVMro4MjqWBuxVusoAhk8cLUIg+JTJ+yhMMpbDbrSdPQLAvHyqQ9ipeMImjKoGjlxPY2PYVlyQqcmV51S6+wqhoV3K8s7mPr/Z8H0mzyaXQv6RDqINzu/Zz1RYmPfbKT42fwpBrwAq9sa5XbSt8k3tjL+dTrYpQnXBENIyzgvte/4v6VI/nxKpyZaRCgH4kG+Xoo1mJNDqCY2mzoQz/Fzp6RBBzNeImn57yDPD5AA+ZNSLNlPstyZ8ZDom/sFPGdoW0oH+CK961JgvUXTKJf3SPoA17eW55LZHIzMgqUWDugEGKJxBgmvz0D1v5TUh+mj3/eKERrXjB9IpRE2IgNqnUJpEjQYX5qbtGcVcCIsElXxyYHX6QbghTQp5fMIGkpUP4K3+h5R11gRWNzkbWW+ga/J3B6hxw8JjMNF6HuLWiPrPtc44A5RiV5r6zzLrJmL2/mrXQ9NZUELvBLM7dXEy4ImCaTbtp2LHVzEXL8vucEYKJKPPt+I6FfBvFWu4CCX7iR9DwqEUmKy4KbJCoQwaFWe0gVdcvskOT9pwi5p6AcD9CN5LqWblFI694UyGYE2epyNF1pbPeHkvLnCv54HdxkQftoF6wUATyJPvhM2dp+7fiX1O3FGCCrbD7PRBEymNnKMSKBXjyzT3xHG5j9DuB+fWIgLKDLtJTU4kWYaI0QxFZaswfb4UdbxEvBwd8VZtEIj/cV0yCg/mtPsIoh/+7g4ciKNlY923+CP1SLLlHVzJRNNex7xu9euCk0azyVyNtZdo6Y8avY8VZo4mRxwawqD/F5ZC1b1Ou4f5WFIc86aJcCig3RIBnwov Z7oVrfnR a0Q206/EsdaU0XZ3/3OFvTyu9AZUBJuqs3HlFj0wE2urCTPCe5iAM2AsWfwvywmOKyrR3Ove37M25EdAIpBVohV8v5sBGvd1fa0gcN5W7u5CdThn3I+KuoAQovFCujuM0pyNms6N5AaRMcp1DVFZtxKpr6B5BAS7NKCNSQwNaq552u4GSquMEvUa1iEZUjfAhLcvY1Q1TolvN2U8KG0K0JX5nWFwcwAcRMNADzae8eU6WPyzr5LjS10Cb1mJi6z1kulryp7AZzQYjCU6RgUQC9AKJm0PBPsXg9sB2IVfiYD+YCChyMJzIdbCdlyFeSeQP5LxlxJpR15rY3UxXnWZP3pLpkw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 10/16/25 08:08, kernel test robot wrote: > > > Hello, > > kernel test robot noticed "BUG:using_smp_processor_id()in_preemptible" on: > > commit: de840681a162e0a5a0862e7a0b495fb34deab7ef ("slab: remove cpu (partial) slabs usage from allocation paths") > https://git.kernel.org/cgit/linux/kernel/git/vbabka/linux.git b4/sheaves-for-all > > in testcase: boot > > config: i386-randconfig-002-20251015 > compiler: gcc-14 > test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G > > (please refer to attached dmesg/kmsg for entire log/backtrace) > > > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot > | Closes: https://lore.kernel.org/oe-lkp/202510161416.b7adda58-lkp@intel.com > Thanks, no more disabled preemption so use the raw version as we don't need it to be stable. Will fold this in: ----8<---- diff --git a/mm/slub.c b/mm/slub.c index 91e1db412018..cd4b0833fb4a 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -1032,7 +1032,7 @@ static void set_track_update(struct kmem_cache *s, void *object, p->handle = handle; #endif p->addr = addr; - p->cpu = smp_processor_id(); + p->cpu = raw_smp_processor_id(); p->pid = current->pid; p->when = jiffies; } @@ -4481,16 +4481,8 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node, pc.orig_size = orig_size; freelist = get_partial(s, node, &pc); if (freelist) { - /* - * TODO: check if still applicable - * - * Due to disabled preemption we need to disallow - * blocking. The flags are further adjusted by - * gfp_nested_mask() in stack_depot itself. - */ if (kmem_cache_debug_flags(s, SLAB_STORE_USER)) - set_track(s, freelist, TRACK_ALLOC, addr, - gfpflags & ~(__GFP_DIRECT_RECLAIM)); + set_track(s, freelist, TRACK_ALLOC, addr, gfpflags); return freelist; } @@ -4515,8 +4507,7 @@ static void *___slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node, goto new_objects; if (kmem_cache_debug_flags(s, SLAB_STORE_USER)) - set_track(s, freelist, TRACK_ALLOC, addr, - gfpflags & ~(__GFP_DIRECT_RECLAIM)); + set_track(s, freelist, TRACK_ALLOC, addr, gfpflags); return freelist; } lines 1-41/41 (END)