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BUG 800480 - xlog_grant_log_space can wait indefinitely

To: nb@xxxxxxx
Subject: BUG 800480 - xlog_grant_log_space can wait indefinitely
From: pv@xxxxxxxxxxxxx (ananth@xxxxxxxxxxxx)
Date: Tue, 29 Aug 2000 17:13:36 -0700 (PDT)
Cc: linux-xfs@xxxxxxxxxxx
Reply-to: sgi.bugs.xfs@xxxxxxxxxxxxxxxxx
Sender: owner-linux-xfs@xxxxxxxxxxx
Webexec: webpvsubmit,PvProjectIncident
Webpv: sgigate.sgi.com
View Incident: 
http://co-op.engr.sgi.com/BugWorks/code/bwxquery.cgi?search=Search&wlong=1&view_type=Bug&wi=800480

Submitter : ananth                    Submitter Domain : engr               
Assigned Engineer : nb                Assigned Domain : sgi.com             
Assigned Group : xfs-linux            Category : software                   
Customer Reported : F                 Priority : 2                          
Project : xfs-linux                   Status : open                         
Description :
We have a semi-production build machine that is
running XFS bits as of 8/23/00. I have seen
things like "rm" getting into the following backtrace:

---------
schedule+0x415
_sv_wait+0xcd
xlog_grant_log_space+0x139
xfs_log_reserve+0x7b
xfs_trans_reserve+0x76
xfs_inactive+0x1ca
vn_put+0x47
linvfs_d_iput+0x1a
d_delete+0x57
vfs_unlink+0x18b
sys_unlink+0x9b
system_call+0x34
-----------

and wait for ever. Both the page_cleaner and pagebuf
daemon had a normal backtrace (ie. both waiting on
their respective timer/semaphore). No other
suspicious looking backtraces in other processes.
The machine was mostly alive except for commands
that would touch the xfs filesystem.


ananth.

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