* [PATCH] Documentation: arm64 supports cma
@ 2020-09-18 3:15 Tian Tao
2020-09-18 3:28 ` Song Bao Hua (Barry Song)
0 siblings, 1 reply; 4+ messages in thread
From: Tian Tao @ 2020-09-18 3:15 UTC (permalink / raw)
To: corbet, keescook, anton, ccross, tony.luck, paulmck, tglx, akpm,
bp, mchehab+huawei, pawan.kumar.gupta, rdunlap, mike.kravetz,
oneukum, gpiccoli, linux-doc
Cc: linuxarm
arm64 also supports cma, updated documentation.
Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
---
Documentation/admin-guide/kernel-parameters.txt | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 7ebe3be..38a1602 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -591,7 +591,7 @@
some critical bits.
cma=nn[MG]@[start[MG][-end[MG]]]
- [ARM,X86,KNL]
+ [ARM,ARM64,X86,KNL]
Sets the size of kernel global memory area for
contiguous memory allocations and optionally the
placement constraint by the physical address range of
--
2.7.4
^ permalink raw reply related [flat|nested] 4+ messages in thread
* RE: [PATCH] Documentation: arm64 supports cma
2020-09-18 3:15 [PATCH] Documentation: arm64 supports cma Tian Tao
@ 2020-09-18 3:28 ` Song Bao Hua (Barry Song)
2020-09-18 4:00 ` Randy Dunlap
0 siblings, 1 reply; 4+ messages in thread
From: Song Bao Hua (Barry Song) @ 2020-09-18 3:28 UTC (permalink / raw)
To: tiantao (H),
corbet, keescook, anton, ccross, tony.luck, paulmck, tglx, akpm,
bp, mchehab+huawei, pawan.kumar.gupta, rdunlap, mike.kravetz,
oneukum, gpiccoli, linux-doc
Cc: Linuxarm
> -----Original Message-----
> From: Tian Tao [mailto:tiantao6@hisilicon.com]
> Sent: Friday, September 18, 2020 3:16 PM
> To: corbet@lwn.net; keescook@chromium.org; anton@enomsg.org;
> ccross@android.com; tony.luck@intel.com; paulmck@kernel.org;
> tglx@linutronix.de; akpm@linux-foundation.org; bp@suse.de;
> mchehab+huawei@kernel.org; pawan.kumar.gupta@linux.intel.com;
> rdunlap@infradead.org; mike.kravetz@oracle.com; oneukum@suse.com;
> gpiccoli@canonical.com; linux-doc@vger.kernel.org
> Cc: Linuxarm <linuxarm@huawei.com>
> Subject: [PATCH] Documentation: arm64 supports cma
>
> arm64 also supports cma, updated documentation.
>
> Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
> ---
> Documentation/admin-guide/kernel-parameters.txt | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/Documentation/admin-guide/kernel-parameters.txt
> b/Documentation/admin-guide/kernel-parameters.txt
> index 7ebe3be..38a1602 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -591,7 +591,7 @@
> some critical bits.
>
> cma=nn[MG]@[start[MG][-end[MG]]]
> - [ARM,X86,KNL]
> + [ARM,ARM64,X86,KNL]
Yes. It supports ARM64. On the other hand, it also supports other architectures like
MIPS
S390
MICROBLAZE
...
So I am not sure if it is a completely correct fix.
CMA only depends on MMU. It probably doesn't depend on arch too much.
Is it better to just move to [KNL]?
> Sets the size of kernel global memory area for
> contiguous memory allocations and optionally the
> placement constraint by the physical address range of
> --
> 2.7.4
Thanks
Barry
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] Documentation: arm64 supports cma
2020-09-18 3:28 ` Song Bao Hua (Barry Song)
@ 2020-09-18 4:00 ` Randy Dunlap
2020-09-18 4:22 ` Song Bao Hua (Barry Song)
0 siblings, 1 reply; 4+ messages in thread
From: Randy Dunlap @ 2020-09-18 4:00 UTC (permalink / raw)
To: Song Bao Hua (Barry Song), tiantao (H),
corbet, keescook, anton, ccross, tony.luck, paulmck, tglx, akpm,
bp, mchehab+huawei, pawan.kumar.gupta, mike.kravetz, oneukum,
gpiccoli, linux-doc
Cc: Linuxarm
On 9/17/20 8:28 PM, Song Bao Hua (Barry Song) wrote:
>
>
>> -----Original Message-----
>> From: Tian Tao [mailto:tiantao6@hisilicon.com]
>> Sent: Friday, September 18, 2020 3:16 PM
>> To: corbet@lwn.net; keescook@chromium.org; anton@enomsg.org;
>> ccross@android.com; tony.luck@intel.com; paulmck@kernel.org;
>> tglx@linutronix.de; akpm@linux-foundation.org; bp@suse.de;
>> mchehab+huawei@kernel.org; pawan.kumar.gupta@linux.intel.com;
>> rdunlap@infradead.org; mike.kravetz@oracle.com; oneukum@suse.com;
>> gpiccoli@canonical.com; linux-doc@vger.kernel.org
>> Cc: Linuxarm <linuxarm@huawei.com>
>> Subject: [PATCH] Documentation: arm64 supports cma
>>
>> arm64 also supports cma, updated documentation.
>>
>> Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
>> ---
>> Documentation/admin-guide/kernel-parameters.txt | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/Documentation/admin-guide/kernel-parameters.txt
>> b/Documentation/admin-guide/kernel-parameters.txt
>> index 7ebe3be..38a1602 100644
>> --- a/Documentation/admin-guide/kernel-parameters.txt
>> +++ b/Documentation/admin-guide/kernel-parameters.txt
>> @@ -591,7 +591,7 @@
>> some critical bits.
>>
>> cma=nn[MG]@[start[MG][-end[MG]]]
>> - [ARM,X86,KNL]
>> + [ARM,ARM64,X86,KNL]
>
> Yes. It supports ARM64. On the other hand, it also supports other architectures like
> MIPS
> S390
> MICROBLAZE
> ...
> So I am not sure if it is a completely correct fix.
>
> CMA only depends on MMU. It probably doesn't depend on arch too much.
>
> Is it better to just move to [KNL]?
How about [KNL,CMA]? CMA is already listed as a build option/restriction
in Documentation/admin-guide/kernel-parameters.rst.
>
>> Sets the size of kernel global memory area for
>> contiguous memory allocations and optionally the
>> placement constraint by the physical address range of
>> --
thanks.
--
~Randy
^ permalink raw reply [flat|nested] 4+ messages in thread
* RE: [PATCH] Documentation: arm64 supports cma
2020-09-18 4:00 ` Randy Dunlap
@ 2020-09-18 4:22 ` Song Bao Hua (Barry Song)
0 siblings, 0 replies; 4+ messages in thread
From: Song Bao Hua (Barry Song) @ 2020-09-18 4:22 UTC (permalink / raw)
To: Randy Dunlap, tiantao (H),
corbet, keescook, anton, ccross, tony.luck, paulmck, tglx, akpm,
bp, mchehab+huawei, pawan.kumar.gupta, mike.kravetz, oneukum,
gpiccoli, linux-doc
Cc: Linuxarm
> -----Original Message-----
> From: Randy Dunlap [mailto:rdunlap@infradead.org]
> Sent: Friday, September 18, 2020 4:00 PM
> To: Song Bao Hua (Barry Song) <song.bao.hua@hisilicon.com>; tiantao (H)
> <tiantao6@hisilicon.com>; corbet@lwn.net; keescook@chromium.org;
> anton@enomsg.org; ccross@android.com; tony.luck@intel.com;
> paulmck@kernel.org; tglx@linutronix.de; akpm@linux-foundation.org;
> bp@suse.de; mchehab+huawei@kernel.org;
> pawan.kumar.gupta@linux.intel.com; mike.kravetz@oracle.com;
> oneukum@suse.com; gpiccoli@canonical.com; linux-doc@vger.kernel.org
> Cc: Linuxarm <linuxarm@huawei.com>
> Subject: Re: [PATCH] Documentation: arm64 supports cma
>
> On 9/17/20 8:28 PM, Song Bao Hua (Barry Song) wrote:
> >
> >
> >> -----Original Message-----
> >> From: Tian Tao [mailto:tiantao6@hisilicon.com]
> >> Sent: Friday, September 18, 2020 3:16 PM
> >> To: corbet@lwn.net; keescook@chromium.org; anton@enomsg.org;
> >> ccross@android.com; tony.luck@intel.com; paulmck@kernel.org;
> >> tglx@linutronix.de; akpm@linux-foundation.org; bp@suse.de;
> >> mchehab+huawei@kernel.org; pawan.kumar.gupta@linux.intel.com;
> >> rdunlap@infradead.org; mike.kravetz@oracle.com; oneukum@suse.com;
> >> gpiccoli@canonical.com; linux-doc@vger.kernel.org
> >> Cc: Linuxarm <linuxarm@huawei.com>
> >> Subject: [PATCH] Documentation: arm64 supports cma
> >>
> >> arm64 also supports cma, updated documentation.
> >>
> >> Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
> >> ---
> >> Documentation/admin-guide/kernel-parameters.txt | 2 +-
> >> 1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/Documentation/admin-guide/kernel-parameters.txt
> >> b/Documentation/admin-guide/kernel-parameters.txt
> >> index 7ebe3be..38a1602 100644
> >> --- a/Documentation/admin-guide/kernel-parameters.txt
> >> +++ b/Documentation/admin-guide/kernel-parameters.txt
> >> @@ -591,7 +591,7 @@
> >> some critical bits.
> >>
> >> cma=nn[MG]@[start[MG][-end[MG]]]
> >> - [ARM,X86,KNL]
> >> + [ARM,ARM64,X86,KNL]
> >
> > Yes. It supports ARM64. On the other hand, it also supports other
> architectures like
> > MIPS
> > S390
> > MICROBLAZE
> > ...
> > So I am not sure if it is a completely correct fix.
> >
> > CMA only depends on MMU. It probably doesn't depend on arch too much.
> >
> > Is it better to just move to [KNL]?
>
> How about [KNL,CMA]? CMA is already listed as a build option/restriction
> in Documentation/admin-guide/kernel-parameters.rst.
Sounds good to me.
>
> >
> >> Sets the size of kernel global memory area for
> >> contiguous memory allocations and optionally the
> >> placement constraint by the physical address range of
> >> --
>
Thanks.
Barry
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2020-09-18 4:22 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2020-09-18 3:15 [PATCH] Documentation: arm64 supports cma Tian Tao
2020-09-18 3:28 ` Song Bao Hua (Barry Song)
2020-09-18 4:00 ` Randy Dunlap
2020-09-18 4:22 ` Song Bao Hua (Barry Song)
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