Bug 129204
| Summary: | 2.6.7.1.494.2.2 Kernel Networking Problem | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | George Salt <ggsalt> |
| Component: | kernel | Assignee: | Dave Jones <davej> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 2 | CC: | gohkl, pfrields, vader, 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: | 2004-11-29 06:00:34 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: | |||
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Description
George Salt
2004-08-05 00:59:05 UTC
I have spurratic TCP hang problems with the new kernel (2.6.7-1.494.2.2). My Mail client hangs when getting mail, my browser hangs when loading web pages, my ssh client hangs when typing commands. Downgrading to 2.6.6-1.435.2.3 solved the problem. *** Bug 129136 has been marked as a duplicate of this bug. *** *** Bug 129135 has been marked as a duplicate of this bug. *** Getting the same problem here, a bunch of TCP connections that worked fine under kernel-2.6.6-1.435.2.3 are now broken under kernel-2.6.7-1.494.2.2. For instance, I normally have several SSH sessions open (to Linux and FreeBSD boxes). Some of those no longer work, the SSH client hangs before ever authenticating. Please see this thread for a possible fix: http://www.redhat.com/archives/fedora-list/2004-August/msg01490.html Worked for me, too. ;-) Indeed. This does "fix" the issue I was having. However, I didn't have to set both of the variables, just the following one: net.ipv4.tcp_default_win_scale=0 Thanks for finding this solution. This solved the file tranfer problem I originally reported. Thanks so much. This is what I love about the open source community. Open Source Rocks! Solved my wget and curl problem too. However, the bug still exists fro kernel-2.6.8.1. For the benefit of others who don't want to look through other threads (http://www.linuxarkivet.se/mlists/linux-net/0406/msg00230.html), you can do the following: Add the following to /etc/sysctl.conf and reboot: # The following solves a kernel networking problem with kernel-2.6.7- 1.494.2.2, kernel-2.6.8-1.521. If you finally do not need it, just comment them with a leading #. net.ipv4.tcp_default_win_scale = 0 this thread is similar to https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=126626 more info at http://lwn.net/Articles/91976/ mass update for old bugs: Is this still a problem in the 2.6.9 based kernel update ? I no longer have an FC2 system to test with (they've both been upgraded to FC3), but FC3 no longer appears to have the net.ipv4.tcp_default_win_scale sysctl: $ uname -r 2.6.9-1.681_FC3 $ /sbin/sysctl net.ipv4.tcp_default_win_scale error: 'net.ipv4.tcp_default_win_scale' is an unknown key Everything does appear to work fine, though. |