From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 In-Reply-To: <9f3c09cec96bb24e7d8be1b3f2a601c8@quanstro.net> References: <9f3c09cec96bb24e7d8be1b3f2a601c8@quanstro.net> Date: Tue, 24 Mar 2009 12:59:41 -0700 Message-ID: Subject: Re: [9fans] kernel tag bug? From: Russ Cox To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Topicbox-Message-UUID: c30b71ce-ead4-11e9-9d60-3106f5b1d025 On Tue, Mar 24, 2009 at 10:59 AM, erik quanstrom wrote: > it looks like devcons is suffering from some sort of tag collision. > a Rwrite is coming back for a Tread. > > Sat Jan 24 09:43:47: mnt: proc rc 10946: mismatch from /mnt/temp/data /dev/cons rep 0xf63661a8 tag 1 fid 1170 T116 R119 rp 1 > Sat Jan 24 10:06:26: unexpected reply tag 1; type 117 > Fri Jan 30 15:21:48: 336082 page: checked 75 page table entries > Wed Mar 18 11:27:27: mnt: proc rc 4632855: mismatch from /mnt/temp/data /dev/cons rep 0xf69e84e8 tag 37 fid 5644 T116 R119 rp 37 > > i don't immediately see the cause of the problem. i've seen this for years in various forms but it had never happened regularly enough to track down, and it was never clear that it was the kernel's fault (and not, say, the 9p server). if you want to look for the problem, you might find it easier in 9vx. i see it in 9vx all the time if i interrupt an outstanding 9p message by typing DEL. 9fs sources; ls /n/sources; DEL on a slow connection, for example. russ