| 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
| ||
|
Message-Id: <200707191237.56455.olaf.kirch@oracle.com> Date: Thu, 19 Jul 2007 12:37:54 +0200 From: Olaf Kirch <olaf.kirch@...cle.com> To: Ingo Molnar <mingo@...e.hu> Cc: Jarek Poplawski <jarkao2@...pl>, Linus Torvalds <torvalds@...ux-foundation.org>, linux-kernel@...r.kernel.org, davem@...emloft.net Subject: Re: [patch] revert: [NET]: Fix races in net_rx_action vs netpoll On Thursday 19 July 2007 12:01, Ingo Molnar wrote: > Calling initcall 0xc0603f55: netpoll_init+0x0/0x39() > initcall 0xc0603f55: netpoll_init+0x0/0x39() returned 0. > initcall 0xc0603f55 ran for 0 msecs: netpoll_init+0x0/0x39() > Calling initcall 0xc0604257: netlink_proto_init+0x0/0x12a() > NET: Registered protocol family 16 > > and no output ever since - and the box has been up for a few minutes. Okay, I need to ask a stupid question - did you verify that it's not spinning on a spinlock? Specifically, I'm wondering whether the net_rx_action softirq may be scheduled while we're in poll_napi holding the poll_lock. net_rx_action would try to take the poll_lock as well, and we'd be hung for good. The patch with local_bh_disable/enable was supposed to test that idea (this is the "trickle" patch) Olaf -- Olaf Kirch | --- o --- Nous sommes du soleil we love when we play okir@....de | / | \ sol.dhoop.naytheet.ah kin.ir.samse.qurax - 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/
Powered by blists - more mailing lists