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[2003:f6:af46:5a00:bfa0:a096:5e5e:d85]) by smtp.gmail.com with ESMTPSA id u9-20020a05600c4d0900b003e1f2e43a1csm5393618wmp.48.2023.02.17.11.31.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Feb 2023 11:31:20 -0800 (PST) From: Mathias Krause To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Sean Christopherson , Paolo Bonzini , Mathias Krause Subject: [PATCH v2 2/2] KVM: Shrink struct kvm_mmu_memory_cache Date: Fri, 17 Feb 2023 20:33:36 +0100 Message-Id: <20230217193336.15278-3-minipli@grsecurity.net> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230217193336.15278-1-minipli@grsecurity.net> References: <20230217193336.15278-1-minipli@grsecurity.net> MIME-Version: 1.0 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=no 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?1758108155873226042?= X-GMAIL-MSGID: =?utf-8?q?1758108155873226042?= Move the 'capacity' member around to make use of the padding hole on 64 bit systems instead of introducing yet another one. This allows us to save 8 bytes per instance for 64 bit builds of which, e.g., x86's struct kvm_vcpu_arch has a few. Signed-off-by: Mathias Krause --- v2: use order as suggested by Sean include/linux/kvm_types.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/kvm_types.h b/include/linux/kvm_types.h index 76de36e56cdf..0b2ddce47f11 100644 --- a/include/linux/kvm_types.h +++ b/include/linux/kvm_types.h @@ -91,11 +91,11 @@ struct gfn_to_pfn_cache { * is topped up (__kvm_mmu_topup_memory_cache()). */ struct kvm_mmu_memory_cache { - int nobjs; gfp_t gfp_zero; gfp_t gfp_custom; struct kmem_cache *kmem_cache; int capacity; + int nobjs; void **objects; }; #endif