Date: Thu, 14 Jan 2010 09:42:41 -0800 From: Nate Lawson <nate@root.org> To: Guido van Rooij <guido@gvr.org> Cc: freebsd-acpi@freebsd.org Subject: Re: ACPI CMBAT notify's never reach devd? Message-ID: <4B4F5791.5020902@root.org> In-Reply-To: <20100114075644.GA18572@gvr.gvr.org> References: <20100113204228.GA8768@gvr.gvr.org> <4B4E799E.2030405@root.org> <20100114075644.GA18572@gvr.gvr.org>
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Guido van Rooij wrote: > On Wed, Jan 13, 2010 at 05:55:42PM -0800, Nate Lawson wrote: >> Most battery systems don't generate the notifies on level changes. So >> our ACPI battery implementation itself is polled. You should probably >> just run a cron job that checks the level. > > That can be done of course, but devd seems a better place. Yes, I just meant for now. >> Perhaps we could add a low and high mark to the kernel code, >> configurable by the user. It would be checked by the cmbat polling code >> and generate an artificial notify to devd if there was a match. >> > > Can you tell me which function in acpi_cmbat is used for polling, > as it seems to me thee is no regular polling. There is a define > CMBAT_POLLRATE but it is never used. It's been a long time since I looked at the code. I think it does it synchronously, in the context of a user requesting the value. So we don't have a periodic polling thread currently. -- Nate
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