Date: Mon, 16 Jul 2012 15:23:57 +0200 From: "Michael Ross" <gmx@ross.cx> To: freebsd-stable@freebsd.org Subject: 8.2 ->8.3 regression on disk writes Message-ID: <op.whjjh7klg7njmm@michael-think>
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Hello, using 8.2 the machine runs fine, using 8.3 or higher, not so much. In laymans terms, if I do "too many" writes/time just once, the machine can't do any disk access for a couple of hours. As in: What's already running stays running, no crashes or anything, but as soon as I need to read from disk (login, start program not cached in memory from previous run), I'm all out of luck. I killed the testing ftp-transfer about 15 seconds after the transfer speed dropped, now I'm waiting for 10+ minutes for ``top'' to start. I can install ports and kernels and world fine, but "ezjail-admin install" or transferring a few GB of files from another machine sends it to limbo. The next step would likely be to go through the kernel changes between 8.2 and 8.3 to narrow it down, I'd appreciate pointers as to what kernel changes to look out for, or other suggestions on what to do. Verbose dmesg: http://gurder.ross.cx/misc/dmesg.txt TIA, Michael Postscript: That's the same problem I wrote about in "Trouble with gmirror and device ada", turns out using gmirror just makes the problem appear much faster as opposed to eventually.
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