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From: John Donnelly <John.p.donnelly@oracle.com>
To: Baoquan He <bhe@redhat.com>, 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
Subject: Re: [PATCH RESEND v2 1/5] docs: kernel-parameters: Update to reflect the current default size of atomic pool
Date: Mon, 6 Dec 2021 21:53:03 -0600	[thread overview]
Message-ID: <31e002fd-e796-06a0-4a21-1dc02411d8b7@oracle.com> (raw)
In-Reply-To: <20211207030750.30824-2-bhe@redhat.com>

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 <bhe@redhat.com>
  Reviewed-by: John Donnelly <john.p.donnelly@oracle.com>
  Tested-by:  John Donnelly <john.p.donnelly@oracle.com>


> ---
>   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:
> 


WARNING: multiple messages have this Message-ID (diff)
From: John Donnelly <John.p.donnelly@oracle.com>
To: Baoquan He <bhe@redhat.com>, 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
Subject: Re: [PATCH RESEND v2 1/5] docs: kernel-parameters: Update to reflect the current default size of atomic pool
Date: Mon, 6 Dec 2021 21:53:03 -0600	[thread overview]
Message-ID: <31e002fd-e796-06a0-4a21-1dc02411d8b7@oracle.com> (raw)
In-Reply-To: <20211207030750.30824-2-bhe@redhat.com>

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 <bhe@redhat.com>
  Reviewed-by: John Donnelly <john.p.donnelly@oracle.com>
  Tested-by:  John Donnelly <john.p.donnelly@oracle.com>


> ---
>   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:
> 


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  reply	other threads:[~2021-12-07  3:53 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-07  3:07 [PATCH RESEND v2 0/5] Avoid requesting page from DMA zone when no managed pages Baoquan He
2021-12-07  3:07 ` Baoquan He
2021-12-07  3:07 ` [PATCH RESEND v2 1/5] docs: kernel-parameters: Update to reflect the current default size of atomic pool Baoquan He
2021-12-07  3:07   ` Baoquan He
2021-12-07  3:53   ` John Donnelly [this message]
2021-12-07  3:53     ` John Donnelly
2021-12-07  3:07 ` [PATCH RESEND v2 2/5] dma-pool: allow user to disable " Baoquan He
2021-12-07  3:07   ` Baoquan He
2021-12-07  3:53   ` John Donnelly
2021-12-07  3:53     ` John Donnelly
2021-12-13  7:44   ` Christoph Hellwig
2021-12-13  7:44     ` Christoph Hellwig
2021-12-13  8:16     ` Baoquan He
2021-12-13  8:16       ` Baoquan He
2021-12-07  3:07 ` [PATCH RESEND v2 3/5] mm_zone: add function to check if managed dma zone exists Baoquan He
2021-12-07  3:07   ` Baoquan He
2021-12-07  3:53   ` John Donnelly
2021-12-07  3:53     ` John Donnelly
2021-12-07 11:23   ` David Hildenbrand
2021-12-07 11:23     ` David Hildenbrand
2021-12-09 13:02     ` Baoquan He
2021-12-09 13:02       ` Baoquan He
2021-12-09 13:10       ` David Hildenbrand
2021-12-09 13:10         ` David Hildenbrand
2021-12-09 13:23         ` Baoquan He
2021-12-09 13:23           ` Baoquan He
2021-12-07  3:07 ` [PATCH RESEND v2 4/5] dma/pool: create dma atomic pool only if dma zone has managed pages Baoquan He
2021-12-07  3:07   ` Baoquan He
2021-12-07  3:07   ` Baoquan He
2021-12-07  3:54   ` John Donnelly
2021-12-07  3:54     ` John Donnelly
2021-12-07  3:54     ` John Donnelly
2021-12-07  3:07 ` [PATCH RESEND v2 5/5] mm/slub: do not create dma-kmalloc if no managed pages in DMA zone Baoquan He
2021-12-07  3:07   ` Baoquan He
2021-12-07  3:54   ` John Donnelly
2021-12-07  3:54     ` John Donnelly
2021-12-07  3:16 ` [PATCH RESEND v2 0/5] Avoid requesting page from DMA zone when no managed pages Baoquan He
2021-12-07  3:16   ` Baoquan He
2021-12-07  4:03   ` John Donnelly
2021-12-07  4:03     ` John Donnelly
2021-12-08  4:33     ` Andrew Morton
2021-12-08  4:33       ` Andrew Morton
2021-12-08  4:56       ` John Donnelly
2021-12-08  4:56         ` John Donnelly
2021-12-13  3:54     ` Baoquan He
2021-12-13  3:54       ` Baoquan He
2021-12-13 13:25   ` Borislav Petkov
2021-12-13 13:25     ` Borislav Petkov
2021-12-13 14:03     ` Baoquan He
2021-12-13 14:03       ` Baoquan He
2021-12-07  8:05 ` Christoph Lameter
2021-12-07  8:05   ` Christoph Lameter
2021-12-09  8:05   ` Baoquan He
2021-12-09  8:05     ` Baoquan He
2021-12-09 12:59     ` Christoph Lameter
2021-12-09 12:59       ` Christoph Lameter
2021-12-13  7:39       ` Baoquan He
2021-12-13  7:39         ` Baoquan He
2021-12-13  7:49         ` Christoph Hellwig
2021-12-13  7:49           ` Christoph Hellwig
2021-12-13 14:21       ` Hyeonggon Yoo
2021-12-13 14:21         ` Hyeonggon Yoo
2021-12-13  7:47   ` Christoph Hellwig
2021-12-13  7:47     ` Christoph Hellwig

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