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Wed, 28 Oct 2026 19:42:04 +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 bhvRBAxQ4mokPQAAD6G6ig (envelope-from ); Wed, 28 Oct 2026 19:42:04 +0000 Date: Wed, 28 Oct 2026 19:42:02 +0000 From: Pedro Falcato To: Suren Baghdasaryan Cc: akpm@linux-foundation.org, david@kernel.org, ljs@kernel.org, jannh@google.com, liam@infradead.org, willy@infradead.org, paulmck@kernel.org, usama.arif@linux.dev, vbabka@kernel.org, linux-fsdevel@vger.kernel.org, yi1.lai@intel.com, oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH 1/1] selftests/proc: use RSS in /proc/pid/smaps_rollup tearing tests Message-ID: References: <20261028051312.1505295-1-surenb@google.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Spamd-Result: default: False [-13.30 / 50.00]; SUSE_INTERNAL_BYPASS(-9.00)[]; 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]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; MISSING_XM_UA(0.00)[]; RCPT_COUNT_TWELVE(0.00)[15]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,intel.com:email,suse.de:email] X-Spam-Score: -13.30 X-Spam-Level: X-Spam-Flag: NO On Wed, Oct 28, 2026 at 10:14:19AM +0000, Pedro Falcato wrote: > On Tue, Oct 27, 2026 at 10:13:12PM -0700, Suren Baghdasaryan wrote: > > Pss metrics can be affected by map count even if VMA tree stays unchanged, > > therefore test checking VMA tree integrity can't use them. Use Rss instead > > and pre-populate the VMAs so that Rss changes if a VMA gets skipped or > > double-counted. > > > > Fixes: ca5480fb53fa ("selftests/proc: add /proc/pid/smaps_rollup tearing tests") > > Reported-by: kernel test robot > > Closes: https://lore.kernel.org/oe-lkp/202610271934.fd287c3f-lkp@intel.com > > Signed-off-by: Suren Baghdasaryan > > Reviewed-by: Pedro Falcato Actually, now I'm wondering: isn't Rss also flaky if memory pressure occurs? -- Pedro