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SubjectRe: [PATCH -mm 3/3] proc: make task_sig() lockless
Date
Roland McGrath <roland@redhat.com> wrote:

> I'm not so sure. Operations like sigprocmask and sigaction really have
> always been entirely atomic from the userland perspective before. Now it
> becomes possible to read from /proc e.g. a blocked set that never existed
> as such (one word updated by sigprocmask but not yet the next word).

If you have a small userspace buffer, that was previously possible too.

David


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