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New: pptp/ppp connection die at high speed on Athlon X2 6000+

Bugme-new Andrew Morton 2 participants 2 messages Jan 18, 2008 – Jan 19, 2008 1 message not in the archive

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Andrew Morton

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#1 lore raw
Quoted 33 lines · On Thu, 17 Jan 2008 23:33:54 -0800 (PST) [email protected] wrote:

http://bugzilla.kernel.org/show_bug.cgi?id=9773

           Summary: pptp/ppp connection die at high speed on Athlon X2 6000+
           Product: Networking
           Version: 2.5
     KernelVersion: 2.6.23.12
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: blocking
          Priority: P1
         Component: Other
        AssignedTo: [email protected]
        ReportedBy: [email protected]

Distribution: debian sid, vanilla kernel
Hardware Environment: Athlon64 X2 6000+ Nforce5
Software Environment: pptp 1.7.0 pppd 2.4.4

Problem Description:
when I download data at high speed (1,5 MB/s or more) connection (pptp dies) drops and reconnect begins (persist option used for pppd) and after reconnect it dies again and again. connection made by "pppd call provider"

before upgrade of hardware (was Athlon64 3500+ NForce4) all works fine at any speed.

Connection will be working if I do some CPU aggressive work such as kernel compile at the same time when I download. When CPU load become low it will drop again.

Quoted 8 lines

kernel 2.6.24rc8 makes it worst. As I see it just hangs my console with message something like "waiting for ppp0 finish" or so... I don't remember exactly message.

Steps to reproduce:
I think you can use any X2 Athlon, make pptp connection and try to download something...

(weird)

#2 lore raw

Andrew Morton wrote, On 01/18/2008 08:48 AM:

Quoted 8 lines · On Thu, 17 Jan 2008 23:33:54 -0800 (PST) [email protected] wrote:
Quoted 7 lines

http://bugzilla.kernel.org/show_bug.cgi?id=9773

           Summary: pptp/ppp connection die at high speed on Athlon X2 6000+
           Product: Networking
           Version: 2.5
     KernelVersion: 2.6.23.12

...

Quoted 3 lines
Quoted 3 lines

kernel 2.6.24rc8 makes it worst. As I see it just hangs my console with message something like "waiting for ppp0 finish" or so... I don't remember exactly message.

Could you please:

- check this after echo 1 > /proc/sys/kernel/sched_compat_yield
- check this with 2.6.22

Regards,
Jarek P.