Messages in this thread | | | From | (Eric W. Biederman) | Date | Thu, 25 Mar 2021 15:21:30 -0500 | Subject | Re: [PATCH 0/2] Don't show PF_IO_WORKER in /proc/<pid>/task/ |
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Jens Axboe <axboe@kernel.dk> writes:
> On 3/25/21 1:42 PM, Linus Torvalds wrote: >> On Thu, Mar 25, 2021 at 12:38 PM Linus Torvalds >> <torvalds@linux-foundation.org> wrote: >>> >>> I don't know what the gdb logic is, but maybe there's some other >>> option that makes gdb not react to them? >> >> .. maybe we could have a different name for them under the task/ >> subdirectory, for example (not just the pid)? Although that probably >> messes up 'ps' too.. > > Heh, I can try, but my guess is that it would mess up _something_, if > not ps/top.
Hmm.
So looking quickly the flip side of the coin is gdb (and other debuggers) needs a way to know these threads are special, so it can know not to attach.
I suspect getting -EPERM (or possibly a different error code) when attempting attach is the right was to know that a thread is not available to be debugged.
Eric
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