| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20211218212014.1315894-12-yury.norov@gmail.com>
Date: Sat, 18 Dec 2021 13:20:07 -0800
From: Yury Norov <yury.norov@...il.com>
To: linux-kernel@...r.kernel.org, Yury Norov <yury.norov@...il.com>,
"James E.J. Bottomley" <jejb@...ux.ibm.com>,
"Martin K. Petersen" <martin.petersen@...cle.com>,
Michał Mirosław <mirq-linux@...e.qmqm.pl>,
"Paul E. McKenney" <paulmck@...nel.org>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Alexey Klimov <aklimov@...hat.com>,
Amitkumar Karwar <amitkarwar@...il.com>,
Andi Kleen <ak@...ux.intel.com>, Andrew Lunn <andrew@...n.ch>,
Andrew Morton <akpm@...ux-foundation.org>,
Andy Gross <agross@...nel.org>,
Andy Lutomirski <luto@...nel.org>,
Andy Shevchenko <andy@...radead.org>,
Anup Patel <anup.patel@....com>,
Ard Biesheuvel <ardb@...nel.org>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...en8.de>,
Catalin Marinas <catalin.marinas@....com>,
Christoph Hellwig <hch@....de>,
Christoph Lameter <cl@...ux.com>,
Daniel Vetter <daniel@...ll.ch>,
Dave Hansen <dave.hansen@...ux.intel.com>,
David Airlie <airlied@...ux.ie>,
David Laight <David.Laight@...LAB.COM>,
Dennis Zhou <dennis@...nel.org>,
Emil Renner Berthing <kernel@...il.dk>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Geetha sowjanya <gakula@...vell.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Guo Ren <guoren@...nel.org>,
Hans de Goede <hdegoede@...hat.com>,
Heiko Carstens <hca@...ux.ibm.com>,
Ian Rogers <irogers@...gle.com>,
Ingo Molnar <mingo@...hat.com>,
Jakub Kicinski <kuba@...nel.org>,
Jason Wessel <jason.wessel@...driver.com>,
Jens Axboe <axboe@...com>, Jiri Olsa <jolsa@...hat.com>,
Joe Perches <joe@...ches.com>,
Jonathan Cameron <jic23@...nel.org>,
Juri Lelli <juri.lelli@...hat.com>,
Kees Cook <keescook@...omium.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
Lee Jones <lee.jones@...aro.org>,
Marc Zyngier <maz@...nel.org>, Marcin Wojtas <mw@...ihalf.com>,
Mark Gross <markgross@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Matti Vaittinen <mazziesaccount@...il.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Mel Gorman <mgorman@...e.de>,
Michael Ellerman <mpe@...erman.id.au>,
Mike Marciniszyn <mike.marciniszyn@...nelisnetworks.com>,
Nicholas Piggin <npiggin@...il.com>,
Palmer Dabbelt <palmer@...belt.com>,
Peter Zijlstra <peterz@...radead.org>,
Petr Mladek <pmladek@...e.com>,
Randy Dunlap <rdunlap@...radead.org>,
Rasmus Villemoes <linux@...musvillemoes.dk>,
Russell King <linux@...linux.org.uk>,
Saeed Mahameed <saeedm@...dia.com>,
Sagi Grimberg <sagi@...mberg.me>,
Sergey Senozhatsky <senozhatsky@...omium.org>,
Solomon Peachy <pizza@...ftnet.org>,
Stephen Boyd <sboyd@...nel.org>,
Stephen Rothwell <sfr@...b.auug.org.au>,
Steven Rostedt <rostedt@...dmis.org>,
Subbaraya Sundeep <sbhatta@...vell.com>,
Sudeep Holla <sudeep.holla@....com>,
Sunil Goutham <sgoutham@...vell.com>,
Tariq Toukan <tariqt@...dia.com>, Tejun Heo <tj@...nel.org>,
Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
Thomas Gleixner <tglx@...utronix.de>,
Ulf Hansson <ulf.hansson@...aro.org>,
Vincent Guittot <vincent.guittot@...aro.org>,
Vineet Gupta <vgupta@...nel.org>,
Viresh Kumar <viresh.kumar@...aro.org>,
Vivien Didelot <vivien.didelot@...il.com>,
Vlastimil Babka <vbabka@...e.cz>,
Will Deacon <will@...nel.org>,
bcm-kernel-feedback-list@...adcom.com, kvm@...r.kernel.org,
linux-alpha@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-crypto@...r.kernel.org, linux-csky@...r.kernel.org,
linux-ia64@...r.kernel.org, linux-mips@...r.kernel.org,
linux-mm@...ck.org, linux-perf-users@...r.kernel.org,
linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
linux-snps-arc@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH 11/17] lib/nodemask: add num_node_state_eq()
Kernel code calls num_node_state() to compare number of nodes with a given
number. The underlying code calls bitmap_weight(), and we can do it more
efficiently with num_node_state_eq because conditional nodes_weight may
stop traversing the nodemask earlier, as soon as condition is met.
Signed-off-by: Yury Norov <yury.norov@...il.com>
---
include/linux/nodemask.h | 5 +++++
mm/page_alloc.c | 2 +-
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h
index 197598e075e9..c5014dbf3cce 100644
--- a/include/linux/nodemask.h
+++ b/include/linux/nodemask.h
@@ -466,6 +466,11 @@ static inline int num_node_state(enum node_states state)
return nodes_weight(node_states[state]);
}
+static inline int num_node_state_eq(enum node_states state, int num)
+{
+ return nodes_weight_eq(node_states[state], num);
+}
+
#define for_each_node_state(__node, __state) \
for_each_node_mask((__node), node_states[__state])
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index edfd6c81af82..71f5652828b8 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -8323,7 +8323,7 @@ void __init page_alloc_init(void)
int ret;
#ifdef CONFIG_NUMA
- if (num_node_state(N_MEMORY) == 1)
+ if (num_node_state_eq(N_MEMORY, 1))
hashdist = 0;
#endif
--
2.30.2
Powered by blists - more mailing lists