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Message-Id: <201201270923.q0R9N4hi065093@red.freebsd.org>
Date: Fri, 27 Jan 2012 09:23:04 GMT
From: Volodymyr Kostyrko <c.kworr@gmail.com>
To: freebsd-gnats-submit@FreeBSD.org
Subject: net.bpf.zerocopy_enable=1 makes pflogd eat cpu and hang
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>Number:         164534
>Category:       kern
>Synopsis:       [bpf] net.bpf.zerocopy_enable=1 makes pflogd eat cpu and hang
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    csjp
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Jan 27 09:30:12 UTC 2012
>Closed-Date:    
>Last-Modified:  Mon May  7 11:40:11 UTC 2012
>Originator:     Volodymyr Kostyrko
>Release:        RELENG_9
>Organization:
None
>Environment:
FreeBSD green.tandem.local 9.0-STABLE FreeBSD 9.0-STABLE #1 r230528: Wed Jan 25 14:46:26 EET 2012     arcade@green.tandem.local:/usr/obj/usr/src/sys/MINIMAL_4BSD  amd64
>Description:
When running kernel with `option ZEROCOPY` and `net.bpf.zerocopy_enable=1`
starting pflogd results in its instant hang and 100% cpu consumption.
>How-To-Repeat:

>Fix:
Don't play with options not in GENERIC I suppose...

>Release-Note:
>Audit-Trail:
Responsible-Changed-From-To: freebsd-bugs->freebsd-net 
Responsible-Changed-By: linimon 
Responsible-Changed-When: Sat Jan 28 04:58:28 UTC 2012 
Responsible-Changed-Why:  
Over to maintainer(s). 

http://www.freebsd.org/cgi/query-pr.cgi?pr=164534 
Responsible-Changed-From-To: freebsd-net->csjp 
Responsible-Changed-By: csjp 
Responsible-Changed-When: Sun Jan 29 02:52:14 UTC 2012 
Responsible-Changed-Why:  
Take, we have fixes for this, but not real sure we have a solution 
agreed upon yet. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=164534 

From: Volodymyr Kostyrko <c.kworr@gmail.com>
To: bug-followup@FreeBSD.org, c.kworr@gmail.com
Cc:  
Subject: Re: kern/164534: [bpf] net.bpf.zerocopy_enable=1 makes pflogd eat
 cpu and hang
Date: Mon, 07 May 2012 14:38:44 +0300

 Hi all.
 
 How about at least noting zero_copy instability in man page and at 
 src/sys/conf/NOTES?
 
 -- 
 Sphinx of black quartz judge my vow.
>Unformatted:
