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Tue, 07 Jun 2022 07:37:43 -0700 (PDT) Message-ID: <564734af-8627-0046-6460-151d3b325439@gmail.com> Date: Tue, 7 Jun 2022 22:37:40 +0800 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: [PATCH v2 4/4] mm: kmemleak: kmemleak_*_phys() set address type and check PA when scan Content-Language: en-US To: Catalin Marinas Cc: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, yee.lee@mediatek.com References: <20220603035415.1243913-1-patrick.wang.shcn@gmail.com> <20220603035415.1243913-5-patrick.wang.shcn@gmail.com> From: Patrick Wang In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=gmail.com header.s=20210112 header.b="kiZU/Iag"; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (imf15.hostedemail.com: domain of patrick.wang.shcn@gmail.com designates 209.85.216.48 as permitted sender) smtp.mailfrom=patrick.wang.shcn@gmail.com X-Stat-Signature: ya78yrzej36ob3cj6znc8wxd7pw7fzwt X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 03DDFA0055 X-HE-Tag: 1654612638-784972 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 2022/6/6 23:29, Catalin Marinas wrote: > On Fri, Jun 03, 2022 at 11:54:15AM +0800, Patrick Wang wrote: >> diff --git a/mm/kmemleak.c b/mm/kmemleak.c >> index 246a70b7218f..62d1ad8f8a44 100644 >> --- a/mm/kmemleak.c >> +++ b/mm/kmemleak.c >> @@ -1156,8 +1156,12 @@ EXPORT_SYMBOL(kmemleak_no_scan); >> void __ref kmemleak_alloc_phys(phys_addr_t phys, size_t size, int min_count, >> gfp_t gfp) >> { >> - if (PHYS_PFN(phys) >= min_low_pfn && PHYS_PFN(phys) < max_low_pfn) >> - kmemleak_alloc(__va(phys), size, min_count, gfp); >> + pr_debug("%s(0x%pa, %zu, %d)\n", __func__, &phys, size, min_count); >> + >> + if (kmemleak_enabled && !min_count) >> + /* create object with OBJECT_PHYS flag */ >> + create_object((unsigned long)phys, size, min_count, >> + gfp, true); >> } > > With an early patch, just drop min_count altogether from this API, > assume 0. Will do. > >> EXPORT_SYMBOL(kmemleak_alloc_phys); >> >> @@ -1170,8 +1174,10 @@ EXPORT_SYMBOL(kmemleak_alloc_phys); >> */ >> void __ref kmemleak_free_part_phys(phys_addr_t phys, size_t size) >> { >> - if (PHYS_PFN(phys) >= min_low_pfn && PHYS_PFN(phys) < max_low_pfn) >> - kmemleak_free_part(__va(phys), size); >> + pr_debug("%s(0x%pa)\n", __func__, &phys); >> + >> + if (kmemleak_enabled) >> + delete_object_part((unsigned long)phys, size, true); >> } >> EXPORT_SYMBOL(kmemleak_free_part_phys); >> >> @@ -1182,8 +1188,10 @@ EXPORT_SYMBOL(kmemleak_free_part_phys); >> */ >> void __ref kmemleak_not_leak_phys(phys_addr_t phys) >> { >> - if (PHYS_PFN(phys) >= min_low_pfn && PHYS_PFN(phys) < max_low_pfn) >> - kmemleak_not_leak(__va(phys)); >> + pr_debug("%s(0x%pa)\n", __func__, &phys); >> + >> + if (kmemleak_enabled) >> + make_gray_object((unsigned long)phys, true); >> } >> EXPORT_SYMBOL(kmemleak_not_leak_phys); > > This function doesn't have any callers, so please remove it. Will do. Thanks, Patrick