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The following reply was made to PR port-alpha/35448; it has been noted by GNATS.
From: "Aaron J. Grier" <agrier%poofygoof.com@localhost>
Subject: Re: port-alpha/35448
Date: Sun, 16 Dec 2012 16:28:08 -0800
flogging a dead horse here, but figured it was time for an update.
the RETREAT / ADVANCE patch in this PR definitely helped me with stability,
although this problem itself may be alpha-specific.
the underlying problem (which exacerbated this problem) was traced to a
duplex mismatch in my network, heavily exercising the NFS retransmit
code. :) it has since been addressed, and the system in question (with
the patch above) has been running stably under constant low-level use.
4:20PM up 623 days, 23:26, 14 users, load averages: 0.05, 0.04, 0.00
the only idea I have for flushing out further bugs with the NFS
retransmit code would be pounding on a UDP mount over a lossy link, IE
purposely set mismatched duplex, crappy hub or switch, or a packet loss
since this patch does no harm and improves at least alpha, could it be
applied to current and pulled-up to NetBSD-6?
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