Date: Tue, 23 Feb 2010 11:40:34 +0100 From: Harald Schmalzbauer <h.schmalzbauer@omnilan.de> To: freebsd-stable@freebsd.org Subject: ahcich timeouts, only with ahci, not with ataahci Message-ID: <4B83B0A2.1030008@omnilan.de>
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[-- Attachment #1 --] Hello, I'm frequently getting my machine locked with ahcichX timeouts: ahcich2: Timeout on slot 0 ahcich2: is 00000000 cs 00000001 ss 00000000 rs 00000001 tfd c0 serr 00000000 ahcich2: Timeout on slot 8 ahcich2: is 00000000 cs 00000100 ss 00000000 rs 00000100 tfd c0 serr 00000000 ahcich2: Timeout on slot 8 ahcich2: is 00000000 cs fffff07f ss ffffff7f rs ffffff7f tfd c0 serr 00000000 ... This happens when backup over GbE overloads ZFS/HDD capabilities. I reduced vfs.zfs.txg.timeout to 1 to prevent the machine from locking up almost immediately, but from it still happens. When I don't use ahci but ataahci (the old driver if I understand things correct) I also see the ZFS burst write congestion, but this doesn't lead to controller timeouts, thus blocking the machine. Sometimes the machine recovers from the disk lock, but most often I have to reboot. Kernel is from Feb. 19, so recent ahci improovements are active. Controller is ICH9R with 3 Samsung F3 SpinPoints. Any ideas how to work arround the hangs other than using the old ahci driver? Thanks, -Harry [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.13 (FreeBSD) iEYEARECAAYFAkuDsKMACgkQLDqVQ9VXb8iTCQCfcQHNwJd7i7Wk6rw1QMyGQETE NqsAoLAz8CAgMmSecAqi50A8bxknqVov =4ECQ -----END PGP SIGNATURE-----
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