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Date: Wed, 15 Aug 2012 09:16:10 -0700 From: "H. Peter Anvin" <hpa@...or.com> To: Cyrill Gorcunov <gorcunov@...nvz.org> CC: LKML <linux-kernel@...r.kernel.org>, Pavel Emelyanov <xemul@...allels.com> Subject: Re: Q: On restoring terminal with hinted index On 08/15/2012 08:25 AM, Cyrill Gorcunov wrote: > Hi Peter, > > that happened that in a sake of restoring ptys after checkpoint > we need to create them with predefined indices, as they were at > moment of dumping. So we have two options -- 1) Open terminals > in sequence until needed index reached 2) Use some other way to > say the kernel that some index is preferred. > > So I thought, would it be acceptible to provide such hint via > sysctl, as in patch below (note I've not even compiled it yet, > but would like to know your opinion early). > > (Maybe even make it one shot, thus once ida_get_new_above called > the pty_next reset to zero). > Pardon me while I vomit... an interaction between sysctl and open? Talk about a race condition from hell. It is stateful, and not connected to the filesystem instance that it is supposed to be affecting. So no, please don't. I understand your objective but it really needs to be something attached to the pts filesystem instance in question. -hpa -- 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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