Date: Mon, 31 Jan 2005 10:23:50 -0800 From: Sam Leffler <sam@errno.com> To: Martin <nakal@web.de> Cc: stable@freebsd.org Subject: Re: Interrupt load high after 73 minutes uptime with ath(4) hostap Message-ID: <41FE77B6.2010203@errno.com> In-Reply-To: <1107194288.801.13.camel@klotz.local> References: <1107194288.801.13.camel@klotz.local>
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Martin wrote: > I'm running: > FreeBSD 5.3-STABLE FreeBSD 5.3-STABLE #0: Mon Jan 31 00:54:51 CET 2005 > i386 > > The card is (Netgear WG311T): > ath0: <Atheros 5212> mem 0xe7000000-0xe700ffff irq 9 at device 15.0 on > pci0 > > After about 73 minutes uptime my PC is busy processing interrupts. > Top shows 90% in IRQ. Everything is slowed down. Earlier kernels > showed same effect. > > When the problem appears, I start "ifconfig ath0 down" then > "ifconfig ath0 up" and everything is ok again for a certain > period of time. > > Further info: > IRQ 9 is being shared with ACPI (I tried to turn off ACPI, no effect). > Earlier it was shared with my VGA-card, but showed exactly the same > symptoms. > > The high interrupt load is not being reported like e.g. an interrupt > storm on lpt. The system is simply slowed down. This is a known problem in the ath driver in stable that should be fixed in current. I expect you are operating 11g. Unfortunately backporting the necessary changes is very hard and not something I intend to do. Sam
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