linux-kernel - Re: [PATCH 1/2] fs: introduce sendfd() syscall

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAPs88r_5GYAmWhW9rwj8c6oAjy8RZYih2mBubgvqRXfcgiUzYw@mail.gmail.com>
Date:	Wed, 3 Dec 2014 13:11:28 +1100
From:	Alex Dubov <alex.dubov@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Alex Dubov <oakad@...oo.com>
Subject: Re: [PATCH 1/2] fs: introduce sendfd() syscall

On Wed, Dec 3, 2014 at 3:42 AM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> On Wed, 2014-12-03 at 03:23 +1100, Alex Dubov wrote:
>
> Tell me how a 128 threads program can use this new mechanism in a
> scalable way.
>
> One signal per thread ?

What for?

Kernel will deliver the signal only to the thread/threads which has
the relevant signal unblocked (they are blocked by default).

>
> I guess we'll keep AF_UNIX then, thank you.

Kindly enlighten me, how are you going to use any file descriptor in a
128 threads program in a scalable way (socket and all)? How this
approach will be different when using signalfd()?

And no, I'm not proposing to take your favorite toys away.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/