Re: [PATCH 0/7] userfault21 update

From	Patrick Donnelly <batrick@batbytes.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 0/7] userfault21 update
Date	2015-10-12 17:10 +0200
Message-ID	<qiMTD-2Aw-9@gated-at.bofh.it> (permalink)
References	<pBGmR-1Fl-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hello Andrea,

On Mon, Jun 15, 2015 at 1:22 PM, Andrea Arcangeli <aarcange@redhat.com> wrote:
> This is an incremental update to the userfaultfd code in -mm.

Sorry I'm late to this party. I'm curious how a ptrace monitor might
use a userfaultfd to handle faults in all of its tracees. Is this
possible without having each (newly forked) tracee "cooperate" by
creating a userfaultfd and passing that to the tracer?

Have you considered using one userfaultfd for an entire tree of
processes (signaled through a flag)? Would not a process id included
in the include/uapi/linux/userfaultfd.h:struct uffd_msg be sufficient
to disambiguate faults?

-- 
Patrick Donnelly
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Re: [PATCH 0/7] userfault21 update Patrick Donnelly <batrick@batbytes.com> - 2015-10-12 17:10 +0200

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