Messages in this thread |  | | Date | Mon, 19 May 2003 18:14:38 -0700 (PDT) | From | Davide Libenzi <> | Subject | Re: [patch] futex API cleanups, futex-api-cleanup-2.5.69-A2 |
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On Tue, 20 May 2003, Rusty Russell wrote:
> In message <20030519233353.GD13706@mail.jlokier.co.uk> you write: > > Ingo Molnar wrote: > > > FUTEX_FD is an instant DoS, it allows the pinning of one page per file > > > descriptor, per thread. With a default limit of 1024 open files per > > > thread, and 256 threads (on a sane/conservative setup), this means 1 GB of > > > RAM can be pinned down by a normal unprivileged user. > > > > The correct solution [;)] is EP_FUTEX - allow a futex to be specified > > as the source of an epoll event.
Futexes do support f_op->poll(), isn't it Rusty ? If so, they're supported by epoll ...
- Davide
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