From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 0DCD931E82E for ; Fri, 17 Jul 2026 07:57:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784275048; cv=none; b=mITjQosGjw4NV+LL77FMS3InAS8C/KIRoCU6oHpy5EufATWG5kXOwCxNNtKCIrninwEIyUSeoGv+VpiWllmxJSddjqUD54UMcD99vtz9VfEZ88twVIFQXWCxOGEaro0MyYhyG2Usi2t/KMFayt8y+Sr5hPhX4M+rRIe4/Jo4Hsg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784275048; c=relaxed/simple; bh=ym+ZvLteeJXRkmKHdlqOSEVJpCko5cWQOCUxXgmJOko=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=JWyJpDwaDlWn3DRDtJy1YvoTOZ0HKde7tQVqw+WI1OzbOjvh0XPvDcsW/S5TJIOSD3U8EQXFIlsekCrz9H5cpUDnT8QQ/q/xK+GwrXZtwCvJqp21ejRyxXshpFSCDcXfVG6VuLTowpbaVLTj/aXeTiLCZdt7lvTy8+W5onLmWxo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [113.200.148.30]) by gateway (Coremail) with SMTP id _____8Axiutk4FlqG3sEAA--.17824S3; Fri, 17 Jul 2026 15:57:24 +0800 (CST) Received: from linux.localdomain (unknown [113.200.148.30]) by front1 (Coremail) with SMTP id qMiowJCxq8Rc4FlqDNUPAA--.25915S4; Fri, 17 Jul 2026 15:57:18 +0800 (CST) From: Tiezhu Yang To: Andrew Morton , Mike Rapoport , Huacai Chen Cc: linux-mm@kvack.org, loongarch@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH v1 2/2] LoongArch: mm: Expand modules virtual address space to 2GB Date: Fri, 17 Jul 2026 15:57:15 +0800 Message-ID: <20260717075715.25513-3-yangtiezhu@loongson.cn> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20260717075715.25513-1-yangtiezhu@loongson.cn> References: <20260717075715.25513-1-yangtiezhu@loongson.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:qMiowJCxq8Rc4FlqDNUPAA--.25915S4 X-CM-SenderInfo: p1dqw3xlh2x3gn0dqz5rrqw2lrqou0/ X-Coremail-Antispam: 1Uk129KBj93XoW7uryfuFWkuw1rJr1fZFyxZwc_yoW8Xr43pF WDAr9YyrW8Wr1SyaykXwnxWr1Yva93GrZIgw4rWr18AF9Iv3WDZr4kX3W3ZF18Xa93KFyx XFyI9w4ava4DJacCm3ZEXasCq-sJn29KB7ZKAUJUUUU7529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUBIb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r126r13M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AK xVW8Jr0_Cr1UM2kKe7AKxVWUXVWUAwAS0I0E0xvYzxvE52x082IY62kv0487Mc804VCY07 AIYIkI8VC2zVCFFI0UMc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2IY67AKxVWU tVWrXwAv7VC2z280aVAFwI0_Gr0_Cr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7V AKI48JMxkF7I0En4kS14v26r126r1DMxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY 6r1j6r4UMxCIbckI1I0E14v26r1Y6r17MI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7 xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUAVWUtwCIc40Y0x0EwIxGrwCI42IY6xII jxv20xvE14v26r4j6ryUMIIF0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw2 0EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr0_Cr1lIxAIcVC2z280aVCY1x02 67AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7IU8EoGPUUUUU== Frequent "execmem: unable to allocate memory" warnings are observed during kernel module loading when updating the latest kernel. This is because the modules virtual address region on LoongArch is tightly constrained to 256MB, while ARM64 and RISC-V are natively configured with a spacious 2GB region. Expand the modules virtual address space to 2GB for LoongArch to eliminate these allocation bottlenecks. This change only applies to 64-bit kernels (CONFIG_64BIT), 32-bit kernels (CONFIG_32BIT) are entirely unaffected since they do not define separate module address regions. With this patch, there are no "execmem: unable to allocate memory" warnings anymore for 64-bit kernels. Signed-off-by: Tiezhu Yang --- arch/loongarch/include/asm/pgtable.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/loongarch/include/asm/pgtable.h b/arch/loongarch/include/asm/pgtable.h index 223528c04d73..e5952ecd6a73 100644 --- a/arch/loongarch/include/asm/pgtable.h +++ b/arch/loongarch/include/asm/pgtable.h @@ -96,7 +96,7 @@ struct vm_area_struct; #ifdef CONFIG_64BIT #define MODULES_VADDR (vm_map_base + PCI_IOSIZE + (2 * PAGE_SIZE)) -#define MODULES_END (MODULES_VADDR + SZ_256M) +#define MODULES_END (MODULES_VADDR + SZ_2G) #ifdef CONFIG_KFENCE #define KFENCE_AREA_SIZE (((CONFIG_KFENCE_NUM_OBJECTS + 1) * 2 + 2) * PAGE_SIZE) -- 2.42.0