Re: [PATCH?] uprobes: change uprobe_write_opcode() to modify the page directly

H. Peter Anvin
2013-12-03T20:44:36Z

There is no architecture-independent way to make code globally visible.

Oleg Nesterov <oleg@redhat.com> wrote:
>On 12/03, H. Peter Anvin wrote:
>>
>> On 12/03/2013 12:01 PM, Oleg Nesterov wrote:
>> >
>> >> followed by whatever synchronization necessary to make it globally
>visible.
>> >
>> > Could you explain what this synchronization should actually do ?
>> >
>>
>> That is architecture-dependent. On x86 it requires each CPU on which
>> this code is visible to be IPId, on others it involves complex icache
>> flushing protocols.
>
>Hmm. And why this would be better than arch-independent code I sent?
>
>IOW. Could you please comment the patch I sent?
>
>Oleg.

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