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From: Joshua Isom <jrisom@gmail.com>
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Subject: kern/177530: ath driver isn't 32 bit int clean
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>Number:         177530
>Category:       kern
>Synopsis:       ath driver isn't 32 bit int clean
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Apr 01 01:50:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Joshua Isom
>Release:        10-CURRENT
>Organization:
>Environment:
FreeBSD jri.homeunix.com 10.0-CURRENT FreeBSD 10.0-CURRENT #6 r248944M: Sun Mar 31 08:03:58 CDT 2013     root@jri.homeunix.com:/usr/obj/root/ATH/head/sys/ATH  amd64

Also including the experimental ar9300 code.
>Description:
On a computer with >4GB ram, the ath driver will drop packets.  At >4GB, it can have intermittent dropped packets and high latencies.  The nic can go from 2ms ping times to 6000ms ping times in an instant.  Setting hw.physmem to hide the extra ram solves the issue.
>How-To-Repeat:
Try the ath driver on a system with >4GB.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: