Date: Tue, 21 Feb 2006 12:34:16 GMT From: Miguel Lopes Santos Ramos <miguel@anjos.strangled.net> To: freebsd-bugs@freebsd.org Subject: Interrupt storm caused by ehci escapes storm protection Message-ID: <200602211234.k1LCYGuA006611@compaq.anjos.strangled.net>
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Hello, I haved detected a problem with device ehci on this amd64 laptop, for which I have already sent a problem report for the usb team (usb/93640). A question remains. Device ehci generates on this system an interrupt storm of 60000 interrupts per second. This should be throttled by kernel interrupt storm protection (on kern/kern_intr.c), but isn't, and the ISR starves the system, rendering it as slow as an old 386 25MHz. The message "Interrupt storm detected on %s; throttling interrupt source." never appears on the console. This problem happens on all versions after 6.0 with a stock GENERIC kernel. Should I send a separate problem report for the failure of storm protection? Miguel Ramos
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