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Wed, 3 Sep 2025 16:10:10 +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 qxcdLWJouGjtdQAAD6G6ig (envelope-from ); Wed, 03 Sep 2025 16:10:10 +0000 Message-ID: Date: Wed, 3 Sep 2025 18:10:10 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/2] mm/show_mem: Dump the status of the mem alloc profiling before printing Content-Language: en-US To: Yueyang Pan , Suren Baghdasaryan , Andrew Morton , Michal Hocko , Brendan Jackman , Johannes Weiner , Zi Yan , Vishal Moola , Shakeel Butt , Usama Arif Cc: linux-mm@kvack.org, kernel-team@meta.com, linux-kernel@vger.kernel.org References: 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: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 65D2040005 X-Stat-Signature: 5dxe4rfq15rbnkseootjkjz54igk6mqp X-Rspam-User: X-HE-Tag: 1756915813-845276 X-HE-Meta: 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 keXanADO lq84B/TKAHTNkGo+UgLJuuMbbA+NGtULNm2JyHu+2IWvIq1L6kCnmHSi+I8JXYmibS/drCAO6ircU8uU0HLPMbTkSubFvvjmVg3ZjHjFOnEbvaoqFRSDo7VICF+FYqtaGXIW52yRnniaOK6nXSI0PRvbJjqEb4voXr2o47dGa/YolRc6kI044/xD/1X5RNpwRGK1R98duoNTz+TXjtxcH6HIXTiFSKuVU1NVyeQIQQLy5lA1w/YgG73dWWd3kPvgcBMJmFuO6TsRge+BtLeTfqgIZX+6b5dy1C1N3cl1YaaBbmrvMTSLa1GDcEQ3KDObitWlrRkltk+QTlEBW9/m+iIxv1ky+oKvbK0u75gJ4hYg3v818gMbzeY6xGwMhH+pbdZTcYmop5/IzuImcMFd/CNq/+H+Vnr2a3lYMzR/CHqKOEyc= 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 9/3/25 13:16, Yueyang Pan wrote: > This patch prints the status of the memory allocation profiling > before __show_mem actually prints the detailed allocation info. > This way will let us know the `0B` we saw in allocation info is > because the profiling is disabled or the allocation is actually > 0B. > > Signed-off-by: Yueyang Pan Acked-by: Vlastimil Babka > --- > mm/show_mem.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/mm/show_mem.c b/mm/show_mem.c > index ecf20a93ea54..fd85a028a926 100644 > --- a/mm/show_mem.c > +++ b/mm/show_mem.c > @@ -427,7 +427,8 @@ void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx) > > nr = alloc_tag_top_users(tags, ARRAY_SIZE(tags), false); > if (nr) { > - pr_notice("Memory allocations:\n"); > + pr_notice("Memory allocations (profiling is currently turned %s):\n", > + mem_alloc_profiling_enabled() ? "on" : "off"); > for (i = 0; i < nr; i++) { > struct codetag *ct = tags[i].ct; > struct alloc_tag *tag = ct_to_alloc_tag(ct);