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Miller" , Bjorn Helgaas , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Valentin Schneider , Tejun Heo , Lai Jiangshan , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Leonardo Bras , Frederic Weisbecker , Phil Auld , Antoine Tenart , Christophe JAILLET , Wang Yufen , mtosatti@redhat.com Cc: linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH v2 4/4] crypto/pcrypt: Do not use isolated CPUs for callback Date: Thu, 13 Oct 2022 15:40:29 -0300 Message-Id: <20221013184028.129486-5-leobras@redhat.com> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221013184028.129486-1-leobras@redhat.com> References: <20221013184028.129486-1-leobras@redhat.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1746599950997961517?= X-GMAIL-MSGID: =?utf-8?q?1746599950997961517?= Currently pcrypt_aead_init_tfm() will pick callback cpus (ctx->cb_cpu) from any online cpus. Later padata_reorder() will queue_work_on() the chosen cb_cpu. This is undesired if the chosen cb_cpu is listed as isolated (i.e. using isolcpus=... or nohz_full=... kernel parameters), since the work queued will interfere with the workload on the isolated cpu. Make sure isolated cpus are not used for pcrypt. Signed-off-by: Leonardo Bras --- crypto/pcrypt.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/crypto/pcrypt.c b/crypto/pcrypt.c index 9d10b846ccf73..0162629a03957 100644 --- a/crypto/pcrypt.c +++ b/crypto/pcrypt.c @@ -16,6 +16,7 @@ #include #include #include +#include static struct padata_instance *pencrypt; static struct padata_instance *pdecrypt; @@ -175,13 +176,15 @@ static int pcrypt_aead_init_tfm(struct crypto_aead *tfm) struct pcrypt_instance_ctx *ictx = aead_instance_ctx(inst); struct pcrypt_aead_ctx *ctx = crypto_aead_ctx(tfm); struct crypto_aead *cipher; + const cpumask_t *hk_wq = housekeeping_cpumask(HK_TYPE_WQ); cpu_index = (unsigned int)atomic_inc_return(&ictx->tfm_count) % - cpumask_weight(cpu_online_mask); + cpumask_weight_and(hk_wq, cpu_online_mask); - ctx->cb_cpu = cpumask_first(cpu_online_mask); + ctx->cb_cpu = cpumask_first_and(hk_wq, cpu_online_mask); for (cpu = 0; cpu < cpu_index; cpu++) - ctx->cb_cpu = cpumask_next(ctx->cb_cpu, cpu_online_mask); + ctx->cb_cpu = cpumask_next_and(ctx->cb_cpu, hk_wq, + cpu_online_mask); cipher = crypto_spawn_aead(&ictx->spawn);