On 9/17/20 8:28 PM, Song Bao Hua (Barry Song) wrote: > > >> -----Original Message----- >> From: Tian Tao [mailto:tiantao6@xxxxxxxxxxxxx] >> Sent: Friday, September 18, 2020 3:16 PM >> To: corbet@xxxxxxx; keescook@xxxxxxxxxxxx; anton@xxxxxxxxxx; >> ccross@xxxxxxxxxxx; tony.luck@xxxxxxxxx; paulmck@xxxxxxxxxx; >> tglx@xxxxxxxxxxxxx; akpm@xxxxxxxxxxxxxxxxxxxx; bp@xxxxxxx; >> mchehab+huawei@xxxxxxxxxx; pawan.kumar.gupta@xxxxxxxxxxxxxxx; >> rdunlap@xxxxxxxxxxxxx; mike.kravetz@xxxxxxxxxx; oneukum@xxxxxxxx; >> gpiccoli@xxxxxxxxxxxxx; linux-doc@xxxxxxxxxxxxxxx >> Cc: Linuxarm <linuxarm@xxxxxxxxxx> >> Subject: [PATCH] Documentation: arm64 supports cma >> >> arm64 also supports cma, updated documentation. >> >> Signed-off-by: Tian Tao <tiantao6@xxxxxxxxxxxxx> >> --- >> 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
