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Tue, 7 Dec 2021 03:53:09 +0000 Message-ID: <31e002fd-e796-06a0-4a21-1dc02411d8b7@oracle.com> Date: Mon, 6 Dec 2021 21:53:03 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.3.0 Subject: Re: [PATCH RESEND v2 1/5] docs: kernel-parameters: Update to reflect the current default size of atomic pool Content-Language: en-US To: Baoquan He , linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, akpm@linux-foundation.org, hch@lst.de, robin.murphy@arm.com, cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, vbabka@suse.cz, m.szyprowski@samsung.com, kexec@lists.infradead.org References: <20211207030750.30824-1-bhe@redhat.com> <20211207030750.30824-2-bhe@redhat.com> From: John Donnelly In-Reply-To: <20211207030750.30824-2-bhe@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: YTOPR0101CA0019.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b00:15::32) To CO1PR10MB4722.namprd10.prod.outlook.com (2603:10b6:303:9e::12) MIME-Version: 1.0 Received: from [192.168.1.126] (47.220.27.44) by YTOPR0101CA0019.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b00:15::32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4755.20 via Frontend Transport; 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So update the > document in kerenl-parameter.txt accordingly. > > Signed-off-by: Baoquan He Reviewed-by: John Donnelly Tested-by: John Donnelly > --- > Documentation/admin-guide/kernel-parameters.txt | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index 9725c546a0d4..ec4d25e854a8 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -664,7 +664,9 @@ > > coherent_pool=nn[KMG] [ARM,KNL] > Sets the size of memory pool for coherent, atomic dma > - allocations, by default set to 256K. > + allocations. Otherwise the default size will be scaled > + with memory capacity, while clamped between 128K and > + 1 << (PAGE_SHIFT + MAX_ORDER-1). > > com20020= [HW,NET] ARCnet - COM20020 chipset > Format: > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx0b-00069f02.pphosted.com ([205.220.177.32]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1muRXk-006t0V-TY for kexec@lists.infradead.org; Tue, 07 Dec 2021 03:53:30 +0000 Message-ID: <31e002fd-e796-06a0-4a21-1dc02411d8b7@oracle.com> Date: Mon, 6 Dec 2021 21:53:03 -0600 Subject: Re: [PATCH RESEND v2 1/5] docs: kernel-parameters: Update to reflect the current default size of atomic pool Content-Language: en-US References: <20211207030750.30824-1-bhe@redhat.com> <20211207030750.30824-2-bhe@redhat.com> From: John Donnelly In-Reply-To: <20211207030750.30824-2-bhe@redhat.com> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Baoquan He , linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, akpm@linux-foundation.org, hch@lst.de, robin.murphy@arm.com, cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, vbabka@suse.cz, m.szyprowski@samsung.com, kexec@lists.infradead.org On 12/6/21 9:07 PM, Baoquan He wrote: > Since commit 1d659236fb43("dma-pool: scale the default DMA coherent pool > size with memory capacity"), the default size of atomic pool has been > changed to take by scaling with system memory capacity. So update the > document in kerenl-parameter.txt accordingly. > > Signed-off-by: Baoquan He Reviewed-by: John Donnelly Tested-by: John Donnelly > --- > Documentation/admin-guide/kernel-parameters.txt | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt > index 9725c546a0d4..ec4d25e854a8 100644 > --- a/Documentation/admin-guide/kernel-parameters.txt > +++ b/Documentation/admin-guide/kernel-parameters.txt > @@ -664,7 +664,9 @@ > > coherent_pool=nn[KMG] [ARM,KNL] > Sets the size of memory pool for coherent, atomic dma > - allocations, by default set to 256K. > + allocations. Otherwise the default size will be scaled > + with memory capacity, while clamped between 128K and > + 1 << (PAGE_SHIFT + MAX_ORDER-1). > > com20020= [HW,NET] ARCnet - COM20020 chipset > Format: > _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec