Messages in this thread |  | | | Date | Wed, 18 Jan 2006 14:00:56 -0800 (PST) | | Subject | Re: [PATCH 1/8] Notifier chain update | | From | "David S. Miller" <> |
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From: Alan Stern <stern@rowland.harvard.edu> Date: Wed, 18 Jan 2006 16:57:30 -0500 (EST)
> On Wed, 18 Jan 2006, Benjamin LaHaise wrote: > > > A notifier callee should not be sleeping, if anything it should be putting > > its work onto a workqueue and completing it when it gets scheduled if it > > has to do something that blocks. > > Sez who? If it's not documented in the kernel source, I don't believe > it.
Many notifiers even get run from software interrupt context, making sleeping illegal.
For example, IPV6 addresses can get added/removed from a device in response to packets, and these operations trigger the inet6addr_chain notifier in net/ipv6/addrconf.c
So sleeping in a notifier is indeed illegal. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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