Bug 14179 - Lockup in pty_write/tty_wakeup when using PPTP
Summary: Lockup in pty_write/tty_wakeup when using PPTP
Status: CLOSED CODE_FIX
Alias: None
Product: Drivers
Classification: Unclassified
Component: Other (show other bugs)
Hardware: All Linux
: P1 high
Assignee: drivers_other
URL:
Keywords:
: 14180 (view as bug list)
Depends on:
Blocks:
 
Reported: 2009-09-15 13:18 UTC by Andrey Rahmatullin
Modified: 2009-09-18 16:35 UTC (History)
0 users

See Also:
Kernel Version: 2.6.31
Subsystem:
Regression: Yes
Bisected commit-id:

Attachments
vsftpd stack trace (6.22 KB, text/plain)
2009-09-15 13:18 UTC, Andrey Rahmatullin 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Andrey Rahmatullin 2009-09-15 13:18:26 UTC 
Created attachment 23095 [details]
vsftpd stack trace

Commit ac89a9174decf343de049a06fad75681f71890eb broke my PPTP: when the box tries to send large data using wide bandwidth (I tried vsftpd and nginx and speed about 500 Kbytes/s and faster), the box locks up after less than second. SysRq+P shows vsftpd or softirqd (in case of nginx) locked in tty_wakeup. One such backtrace is attached. Reverting ac89a9174decf343de049a06fad75681f71890eb fixes this regression.
Comment 1 Andrey Rahmatullin 2009-09-15 13:19:15 UTC 
*** Bug 14180 has been marked as a duplicate of this bug. ***
Comment 2 Andrey Rahmatullin 2009-09-18 16:34:59 UTC 
Fixed by 202c4675c55ddf6b443c7e057d2dff6b42ef71aa
Comment 3 Andrey Rahmatullin 2009-09-18 16:34:59 UTC 
Fixed by 202c4675c55ddf6b443c7e057d2dff6b42ef71aa
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