Received: by 2002:a05:7412:5112:b0:fa:6e18:a558 with SMTP id fm18csp1500528rdb; Wed, 24 Jan 2024 18:43:55 -0800 (PST) X-Google-Smtp-Source: AGHT+IF9i+UbKL3MyHYXDMkjCHa4x6w52sJ06lBCaKA7Er9Ebc0jqIdBjLH61TpBxqyzRQ6I0VhG X-Received: by 2002:a05:6871:2894:b0:214:b567:5a75 with SMTP id bq20-20020a056871289400b00214b5675a75mr257546oac.108.1706150635031; Wed, 24 Jan 2024 18:43:55 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1706150634; cv=pass; d=google.com; s=arc-20160816; b=HAMW/pXWC3uPNgW6amdM9Re0ukicWIWPQ8Wiwb5PPH2S4WZmLnsqxKYmTXJUaJbEsu qw+LCZUvFKdA5CXPvtVh7nZ+eGVyGTQOsQsLDfKd8GKrgXkaAQ0tnnwnFgg5kopfFGbq 7uAH097tbtWRhWAmFy4C0CIT/JQYdfCzZnNRvIUm7Ut+YNt9ZkXItbIjoeg02ev8g9ud sneUdUJSGFQajmoj8y05EMjr1B4evykDRNDIslJFKRDFwtERzOW66eH0WilHXsF5d0Ng t2KdLKUVfBRbQKXK+F0SSsjdSWZ35PIHJaJR+x/MMFo2htRdyzoczPWSrc0ftjbf/xfN 5StQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:in-reply-to:cc:from:references:to :content-language:subject:mime-version:list-unsubscribe :list-subscribe:list-id:precedence:date:dkim-signature:message-id; bh=vfgGA7zDp2YuL24bfZ9uV+PDegKQEBOnvlT1qNaUykw=; fh=YykZ3h4gaBWy5s/cniwZV8aVgts7Sdi0Vzs+gROI1Ro=; b=LdDUeJFPz5GYrroKCARKEeiu5LxAWiLj5boESWy+qFihuQCcmYWRF2oLLEfpuE/0tN poekgAojA2mYFignIahSVnaTOAOcr40gH3R0cLf9c/38COxKTg55sBMEA28f0I3K4Dir disVyMMTzXWvs+ihmptxySyQKdXdMXMI/bPH/fTJhwYTlGWk3xJaVfPpD3V0wKAuWNtE PV0+XP0Az3N6yttsTAimlUayemdYFWd5QauVelbeF4H4CJ4/SBLKDRFZAZFWKl8tKe/Z R5hpAKjvhTKeJ9KL9TF87XM7tgnl4yO0AWFGEAPwEt56V6QWOwgPuRX1UzlgPDUkzWHB LcPA== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@linux.dev header.s=key1 header.b=Dlu0FC8X; arc=pass (i=1 spf=pass spfdomain=linux.dev dkim=pass dkdomain=linux.dev dmarc=pass fromdomain=linux.dev); spf=pass (google.com: domain of linux-kernel+bounces-37894-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-37894-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linux.dev Return-Path: Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. [2604:1380:45e3:2400::1]) by mx.google.com with ESMTPS id bs64-20020a632843000000b005d44c945aebsi2776199pgb.82.2024.01.24.18.43.54 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Jan 2024 18:43:54 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel+bounces-37894-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1; Authentication-Results: mx.google.com; dkim=pass header.i=@linux.dev header.s=key1 header.b=Dlu0FC8X; arc=pass (i=1 spf=pass spfdomain=linux.dev dkim=pass dkdomain=linux.dev dmarc=pass fromdomain=linux.dev); spf=pass (google.com: domain of linux-kernel+bounces-37894-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) smtp.mailfrom="linux-kernel+bounces-37894-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linux.dev Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sv.mirrors.kernel.org (Postfix) with ESMTPS id 99A1C281EEC for ; Thu, 25 Jan 2024 02:43:54 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 5638763AE; Thu, 25 Jan 2024 02:43:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="Dlu0FC8X" Received: from out-179.mta0.migadu.com (out-179.mta0.migadu.com [91.218.175.179]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 815E97475 for ; Thu, 25 Jan 2024 02:43:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.179 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706150626; cv=none; b=Bo2+C3BnJzuHzt/iJnu3pD0X/XEWR5JTn82qnR8l0G4Ez7JM8oBzlaUYICVTtF4Irk4zLIFqwvNgt56Wyn/vVmeKxQ21B8FUrEKLPDEKgykDbebbZdUYm439+qrH8RCoUYRBMr/CXII3H0yBQ9Uyy5bXONjvmVbjTVq/f0PizXQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706150626; c=relaxed/simple; bh=epnQ2T5/hSU4soZs9ZTpDtAlKVSYHK4bARFOC+6XZXA=; h=Message-ID:Date:MIME-Version:Subject:To:References:From:Cc: In-Reply-To:Content-Type; b=PUryLbyOEzNkg39jd2SQyPB4xa2bEOjGOHFYw/x/vjwd07oin8wxQP2TyhdLdGVHOf2UVZ16d5qZYeTcCvmgjHJ3zP1Ac7rv5XiLhrRdkr5xq8ElzYJsPxj/1ZhvOMBaMv9M00KmQmc5R7mTfHSwsz0r1T/yBP0DRvQlBsSVI6I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=Dlu0FC8X; arc=none smtp.client-ip=91.218.175.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Message-ID: <6cfde276-1175-b798-cc40-2a8654a1846e@linux.dev> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1706150616; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=vfgGA7zDp2YuL24bfZ9uV+PDegKQEBOnvlT1qNaUykw=; b=Dlu0FC8Xmncej8IyWmUFQ7DqsQdjp6pG15ocvAdF3TSWTc0QAK0RqkyBX2gVEvq2MnxoDq 6/3J5w6CJlOGeEWEJfUVpM35NNhmeFTZe5OGjWGrJKnun04qbBo5qwRaAOTEvwFljRIzM8 mRUKR1ZoJoO1j206UT9GVHRKFaKjS9o= Date: Thu, 25 Jan 2024 10:43:27 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: [PATCH v2] mm/mmap: introduce vma_set_range() Content-Language: en-US To: "Liam R. Howlett" References: <20240124035719.3685193-1-yajun.deng@linux.dev> <20240124154756.edja2u2rjzlm23vy@revolver> X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Yajun Deng Cc: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org In-Reply-To: <20240124154756.edja2u2rjzlm23vy@revolver> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Migadu-Flow: FLOW_OUT On 2024/1/24 23:47, Liam R. Howlett wrote: > * Yajun Deng [240123 22:57]: >> There is a lot of code needs to set the range of vma in mmap.c, >> introduce vma_set_range() to simplify the code. >> >> Signed-off-by: Yajun Deng > Thank you for making the suggested changes, I have one small comment but > you don't need to re-spin the patch for it. This looks good. > > Reviewed-by: Liam R. Howlett > >> --- >> v2: use vma_set_range and put it to mm/internal.h. >> v1: https://lore.kernel.org/all/20240111021526.3461825-1-yajun.deng@linux.dev/ >> --- >> mm/internal.h | 9 +++++++++ >> mm/mmap.c | 29 +++++++---------------------- >> 2 files changed, 16 insertions(+), 22 deletions(-) >> >> diff --git a/mm/internal.h b/mm/internal.h >> index f309a010d50f..1e29c5821a1d 100644 >> --- a/mm/internal.h >> +++ b/mm/internal.h >> @@ -1114,6 +1114,15 @@ static inline bool gup_must_unshare(struct vm_area_struct *vma, >> extern bool mirrored_kernelcore; >> extern bool memblock_has_mirror(void); >> >> +static __always_inline void vma_set_range(struct vm_area_struct *vma, >> + unsigned long start, unsigned long end, >> + pgoff_t pgoff) > Nit: This isn't part of the style guide, but if you just indent with two > tabs for arguments then it is easier to expand the list without more > lines. It also allows changing the function prototype without > re-indenting all the other lines, so future changes can be smaller. I > think you would save a line here without affecting readability. Thank you. I thought the parameters needed to be aligned. > >> +{ >> + vma->vm_start = start; >> + vma->vm_end = end; >> + vma->vm_pgoff = pgoff; >> +} >> + >> static inline bool vma_soft_dirty_enabled(struct vm_area_struct *vma) >> { >> /* >> diff --git a/mm/mmap.c b/mm/mmap.c >> index cf2f058bb3ae..7a9d2895a1bd 100644 >> --- a/mm/mmap.c >> +++ b/mm/mmap.c >> @@ -663,9 +663,7 @@ int vma_expand(struct vma_iterator *vmi, struct vm_area_struct *vma, >> >> vma_prepare(&vp); >> vma_adjust_trans_huge(vma, start, end, 0); >> - vma->vm_start = start; >> - vma->vm_end = end; >> - vma->vm_pgoff = pgoff; >> + vma_set_range(vma, start, end, pgoff); >> vma_iter_store(vmi, vma); >> >> vma_complete(&vp, vmi, vma->vm_mm); >> @@ -708,9 +706,7 @@ int vma_shrink(struct vma_iterator *vmi, struct vm_area_struct *vma, >> vma_adjust_trans_huge(vma, start, end, 0); >> >> vma_iter_clear(vmi); >> - vma->vm_start = start; >> - vma->vm_end = end; >> - vma->vm_pgoff = pgoff; >> + vma_set_range(vma, start, end, pgoff); >> vma_complete(&vp, vmi, vma->vm_mm); >> return 0; >> } >> @@ -1015,10 +1011,7 @@ static struct vm_area_struct >> >> vma_prepare(&vp); >> vma_adjust_trans_huge(vma, vma_start, vma_end, adj_start); >> - >> - vma->vm_start = vma_start; >> - vma->vm_end = vma_end; >> - vma->vm_pgoff = vma_pgoff; >> + vma_set_range(vma, vma_start, vma_end, vma_pgoff); >> >> if (vma_expanded) >> vma_iter_store(vmi, vma); >> @@ -2809,11 +2802,9 @@ unsigned long mmap_region(struct file *file, unsigned long addr, >> } >> >> vma_iter_config(&vmi, addr, end); >> - vma->vm_start = addr; >> - vma->vm_end = end; >> + vma_set_range(vma, addr, end, pgoff); >> vm_flags_init(vma, vm_flags); >> vma->vm_page_prot = vm_get_page_prot(vm_flags); >> - vma->vm_pgoff = pgoff; >> >> if (file) { >> vma->vm_file = get_file(file); >> @@ -3163,9 +3154,7 @@ static int do_brk_flags(struct vma_iterator *vmi, struct vm_area_struct *vma, >> goto unacct_fail; >> >> vma_set_anonymous(vma); >> - vma->vm_start = addr; >> - vma->vm_end = addr + len; >> - vma->vm_pgoff = addr >> PAGE_SHIFT; >> + vma_set_range(vma, addr, addr + len, addr >> PAGE_SHIFT); >> vm_flags_init(vma, flags); >> vma->vm_page_prot = vm_get_page_prot(flags); >> vma_start_write(vma); >> @@ -3402,9 +3391,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, >> new_vma = vm_area_dup(vma); >> if (!new_vma) >> goto out; >> - new_vma->vm_start = addr; >> - new_vma->vm_end = addr + len; >> - new_vma->vm_pgoff = pgoff; >> + vma_set_range(new_vma, addr, addr + len, pgoff); >> if (vma_dup_policy(vma, new_vma)) >> goto out_free_vma; >> if (anon_vma_clone(new_vma, vma)) >> @@ -3572,9 +3559,7 @@ static struct vm_area_struct *__install_special_mapping( >> if (unlikely(vma == NULL)) >> return ERR_PTR(-ENOMEM); >> >> - vma->vm_start = addr; >> - vma->vm_end = addr + len; >> - >> + vma_set_range(vma, addr, addr + len, 0); >> vm_flags_init(vma, (vm_flags | mm->def_flags | >> VM_DONTEXPAND | VM_SOFTDIRTY) & ~VM_LOCKED_MASK); >> vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); >> -- >> 2.25.1 >>