From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Dovera Subject: problem to access /proc/acpi/battery/BAT1/* files Date: Sun, 02 Nov 2003 21:43:11 +0100 Sender: linux-c-programming-owner@vger.kernel.org Message-ID: <3FA56C5F.1080600@bmind.it> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: linux-c-programming@vger.kernel.org Hi all, on my RH9 2.6.0-test6 I noticed a strange log in /var/log/messages: Oct 17 18:15:16 localhost kernel: dswload-0269: *** Error: Looking up [PBST] in namespace, AE_ALREADY_EXISTS Oct 17 18:15:16 localhost kernel: psparse-0589 [293932] ps_parse_loop : During name lookup/catalog, AE_ALREADY_EXISTS Oct 17 18:15:16 localhost kernel: psparse-1121: *** Error: Method execution failed [\_SB_.PCI0.LPC0.BAT1._BST](Nodec12ab328), AE_ALREADY_EXISTS Oct 17 18:15:25 localhost kernel: dswload-0269: *** Error: Looking up [PBST] in namespace, AE_ALREADY_EXISTS Oct 17 18:15:25 localhost kernel: psparse-0589 [294043] ps_parse_loop : During name lookup/catalog, AE_ALREADY_EXISTS Oct 17 18:15:25 localhost kernel: psparse-1121: *** Error: Method execution failed [\_SB_.PCI0.LPC0.BAT1._BST] (Node c12ab328), AE_ALREADY_EXISTS the problem arises when on my system two programs access concurrently the files into /proc/acpi/battery/BAT1/* for example I run the cpufrequency, a daemon to switch CPU frequency on my P4 laptop http://sourceforge.net/projects/cpufrequency/ (this program checks every some seconds the status of battery) and I use watch -n 8 "cat /proc/acpi/battery/BAT1/*" to see the battery state in another xterm. Is there any kind of lock to access the status of battery? thanks for your time, Paolo Dovera