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Wed, 27 Aug 2025 09:55:47 +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 tdTGACPWrmhaIAAAD6G6ig (envelope-from ); Wed, 27 Aug 2025 09:55:47 +0000 Message-ID: <229010f4-a68c-400a-94bf-4532ee451ef5@suse.cz> Date: Wed, 27 Aug 2025 11:55:46 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 0/2] mm/slub: Fix debugfs stack trace sorting and simplify sort call Content-Language: en-US To: Kuan-Wei Chiu , akpm@linux-foundation.org Cc: cl@gentwo.org, rientjes@google.com, roman.gushchin@linux.dev, harry.yoo@oracle.com, glittao@gmail.com, jserv@ccns.ncku.edu.tw, chuang@cs.nycu.edu.tw, cfmc.cs13@nycu.edu.tw, jhcheng.cs13@nycu.edu.tw, c.yuanhaur@wustl.edu, linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20250826062315.644520-1-visitorckw@gmail.com> From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spamd-Result: default: False [-4.30 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCPT_COUNT_TWELVE(0.00)[14]; FUZZY_RATELIMITED(0.00)[rspamd.com]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_ALL(0.00)[]; FREEMAIL_TO(0.00)[gmail.com,linux-foundation.org]; ARC_NA(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; FROM_HAS_DN(0.00)[]; FREEMAIL_CC(0.00)[gentwo.org,google.com,linux.dev,oracle.com,gmail.com,ccns.ncku.edu.tw,cs.nycu.edu.tw,nycu.edu.tw,wustl.edu,kvack.org,vger.kernel.org]; TO_DN_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; URIBL_BLOCKED(0.00)[suse.cz:mid]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.cz:mid,imap1.dmz-prg2.suse.org:helo] X-Spam-Flag: NO X-Spam-Level: X-Spam-Score: -4.30 On 8/26/25 08:23, Kuan-Wei Chiu wrote: > Fix the comparison function used for sorting stack trace locations in > the slub debugfs interface. The original implementation violated the > antisymmetry property required by sort(), which could lead to > unreliable ordering of the output. The patches correct the comparison > function to return 0 when counts are equal and replace the unnecessary > use of sort_r() with the simpler sort(). > --- > Changes in v2: > * Use cmp_int(). > * Drop Cc stable. > > v1: https://lore.kernel.org/lkml/20250825013419.240278-1-visitorckw@gmail.com/ > > Kuan-Wei Chiu (2): > mm/slub: Fix cmp_loc_by_count() to return 0 when counts are equal > mm/slub: Replace sort_r() with sort() for debugfs stack trace sorting Applied to slab/for-next, thanks! > mm/slub.c | 11 ++++------- > 1 file changed, 4 insertions(+), 7 deletions(-) >