Messages in this thread | | | Date | Fri, 29 Nov 2013 21:05:32 +0100 | From | Oleg Nesterov <> | Subject | Re: [PATCH] Add a text_poke syscall v2 |
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On 11/29, Andi Kleen wrote: > > > Andi, et al. I am going to discuss the things I do not really > > understand, probably this can't make any sense, but... > > I think it's enough to set the dirty bit in the underlying > struct page, no need to play games with the PTE.
Ah, sorry for confusion, I guess you misunderstood.
I meant, perhaps sys_text_poke() doesn't the in-kernel text_poke machinery altogether?
Can't we invalidate pte (so that any user will stuck in page fault), update the page(s), restore the pte and drop the locks?
This way sys_text_poke() won't be x86-specific, and it will be per-mm.
Oleg.
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