Bug 143364
| Summary: | kernel: serial8250: too much work for irq4 | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | bastiaan |
| Component: | kernel | Assignee: | Dave Jones <davej> |
| Status: | CLOSED WONTFIX | QA Contact: | Brian Brock <bbrock> |
| Severity: | low | Docs Contact: | |
| Priority: | medium | ||
| Version: | 3 | CC: | pfrields, purpleidea, redhat, wtogami |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i686 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2005-07-30 00:42:59 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
An update has been released for Fedora Core 3 (kernel-2.6.12-1.1372_FC3) which may contain a fix for your problem. Please update to this new kernel, and report whether or not it fixes your problem. If you have updated to Fedora Core 4 since this bug was opened, and the problem still occurs with the latest updates for that release, please change the version field of this bug to 'fc4'. Thank you. Thanks for the update. (Un)fortunately I don't have the mentioned laptop in my posession anymore, and the newer replacement laptop does not exhibit the problem. So, at the moment I cannot give feedback on the update. hmm, I appear to have accidentally modified status to 'assigned': resetting to 'needinfo'. Sorry. ok, thanks for the update. I have been seeing this message in my log since I upgraded from FC2 to FC4 (except in my case it says irq10 rather than irq4). I rarely use the serial port though, so I don't know if it is working or not. This problem also exist in kernel-2.6.17-1.2187_FC5 Seen in kernel-2.6.18-1.2200.fc5, will somebody please update version? This is still an issue in FC13-Beta.RC5 when booting e.g. -netinst.iso with console=ttyS0,115200n8 - The console works though, the log is just spammed with these messages whenever lot's of output is written to ttyS0. Note that this happens within a VirtualBox VM: http://www.virtualbox.org/ticket/2752 http://kerneltrap.org/mailarchive/linux-kernel/2008/2/5/735714 FWIW: I get this message on my serial console on kvm/centos6.2 with centos6.2 guest. |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; rv:1.7.3) Gecko/20041003 Firefox/0.10 Description of problem: When using the serial port to communicate with the TowiToko Chipdrive smartcard interface, the kernel logs repeatedly 'serial8250: too much work for irq4' to syslog and communication to the smartcard interface fails. Version-Release number of selected component (if applicable): kernel-2.6.9-1.667, kernel-2.6.9-1.685_FC3, kernel-2.6.9-1.715_FC3 How reproducible: Always Steps to Reproduce: 1. install pcsc-lite, pcsc-lite-tools and the towitoko smartcard driver 2. run /usr/bin/scriptor Actual Results: The kernel logs 'serial8250: too much work for irq4' and the PCSC driver daemon complains about driver initialization failure. Expected Results: The driver should initialize properly: the same pcsc-lite and towitoko driver revisions do function properly on another system running FC2. Additional info: The smartcard interface communicates with 9600 bps. The serial port appears to function properly to other serial devices at even higher speeds (115kbps) with for example minicom, I've not been able to reproduce the 'too much work' message with other serial port usage than the towitoko smartcard interface. Oddly enough, problem does not appear when one first disconnects the smartcard interface, starts up and quits minicom reconnects the smartcard interface and then starts pcsc daemon. The computer is a Toshiba Stallite 4090CDS with 400MHz Intel Celeron and, according to the 8250/16550 serial driver a 16550A UART. cat /proc/interrupts: CPU0 0: 34854959 XT-PIC timer 1: 8 XT-PIC i8042 2: 0 XT-PIC cascade 3: 27082 XT-PIC xirc2ps_cs 4: 491 XT-PIC serial 8: 1 XT-PIC rtc 11: 14 XT-PIC ESS Maestro, uhci_hcd, yenta, yenta 12: 66 XT-PIC i8042 14: 112890 XT-PIC ide0 15: 312764 XT-PIC ide1 cat /proc/ioports: CPU0 0: 34854959 XT-PIC timer 1: 8 XT-PIC i8042 2: 0 XT-PIC cascade 3: 27082 XT-PIC xirc2ps_cs 4: 491 XT-PIC serial 8: 1 XT-PIC rtc 11: 14 XT-PIC ESS Maestro, uhci_hcd, yenta, yenta 12: 66 XT-PIC i8042 14: 112890 XT-PIC ide0 15: 312764 XT-PIC ide1