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SubjectRe: [PATCH v4 2/6] KVM: x86: introduce memslot_set_lpage_disallowed
On 05/03/2013 10:10 AM, Takuya Yoshikawa wrote:
> On Sat, 27 Apr 2013 11:13:18 +0800
> Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> wrote:
>
>> It is used to set disallowed large page on the specified level, can be
>> used in later patch
>>
>> Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
>> ---
>> arch/x86/kvm/x86.c | 53 ++++++++++++++++++++++++++++++++++-----------------
>> 1 files changed, 35 insertions(+), 18 deletions(-)
>>
>> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
>> index 91dd9f4..52b4e97 100644
>> --- a/arch/x86/kvm/x86.c
>> +++ b/arch/x86/kvm/x86.c
>> @@ -6917,12 +6917,45 @@ void kvm_arch_free_memslot(struct kvm_memory_slot *free,
>> }
>> }
>>
>> +static void memslot_set_lpage_disallowed(struct kvm_memory_slot *slot,
>> + unsigned long npages,
>> + int lpage_size, int lpages)
>
> What this function does is to disable large page support for this slot
> as can be seen in the comment below.
>
> Since setting lpage_info to something ("disallowed" ?) is an implementation
> detail, we'd better hide such a thing from the function name.
>
> Taking into account that we have "kvm_largepages_enabled()", something like
> disable_largepages_memslot() may be a candidate.
>

No.

kvm_largepages_enabled effects on largepages_enabled, it is not related
with this function. Actually, I really do not care the different between
"disallowed" and "disabled".




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