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Date: Mon, 20 Dec 2010 20:43:54 +0100 From: Oleg Nesterov <oleg@...hat.com> To: Tejun Heo <tj@...nel.org> Cc: roland@...hat.com, linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, rjw@...k.pl, jan.kratochvil@...hat.com Subject: Re: [PATCH 14/16] ptrace: make SIGCONT notification reliable against ptrace On 12/06, Tejun Heo wrote: > > This patch adds a new signal flag SIGNAL_NOTIFY_CONT which is set when > a task is woken up by SIGCONT and cleared once the event is notified > to the parent. SIGNAL_CLD_MASK bits are no longer cleared after > notification. Combined with clearing SIGNAL_CLD_MASK if > !SIGNAL_NOTIFY_CONT on ptrace attach, these bits are set on ptrace > detach iff the tracee owes a notification to the real parent. > __ptrace_unlink() is updated to check these bits and reschedule > SIGCONT notification if necessary. It turns out I can no longer read the patches today ;) Will continue tomorrow with the fresh head. I must admit, I have some concerns. But most probably I just need to actually understand what this patch does. Oleg. -- 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/
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