Bug 84928 - Possible deadlock under heavy load
Summary: Possible deadlock under heavy load
Keywords:
Status: CLOSED WORKSFORME
Alias: None
Product: Red Hat Enterprise Linux 2.1
Classification: Red Hat
Component: kernel
Version: 2.1
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Larry Woodman
QA Contact: Brian Brock
URL:
Whiteboard:
Depends On:
Blocks: 116726
TreeView+ depends on / blocked
 
Reported: 2003-02-23 23:09 UTC by Larry Troan
Modified: 2016-04-18 09:39 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2004-07-19 19:13:09 UTC
Target Upstream Version:


Attachments (Terms of Use)

Description Larry Troan 2003-02-23 23:09:52 UTC
This fix has been accepted in 2.5

http://linux.bkbits.net:8080/linux-2.5/cset@1.1005?nav=index.html|ChangeSet@-1d

cut-n-paste from the checkin message:

We\'re calling mmdrop() under spin_lock_irq(&rq->lock).  But mmdrop
calls vfree(), which calls smp_call_function().

It is not legal to call smp_call_function() with irq\'s off.  Because
another CPU may be running smp_call_function() against _this_ CPU, which
deadlocks.

Our read of the code is that AS 2.1 is also susceptible to this problem.

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Action by: arunsharma
Issue Registered

ISSUE TRACKER 16281 by Intel as sev 3

Comment 3 Tim Burke 2004-05-17 15:52:27 UTC
Is a customer really hitting this bug?


Comment 4 Larry Woodman 2004-06-23 14:14:48 UTC
We could never locate the patch thats being referenced here.  Please
provide a link to the actual patch.

Larry



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