Date: Thu, 04 Apr 2013 00:15:32 +0200 From: Matthias Andree <mandree@FreeBSD.org> To: Alexander Motin <mav@FreeBSD.org> Cc: Jeremy Chadwick <jdc@koitsu.org>, freebsd-current@freebsd.org, freebsd-stable@freebsd.org Subject: Re: Any objections/comments on axing out old ATA stack? Message-ID: <515CAA04.1050108@FreeBSD.org> In-Reply-To: <515BF5AE.4050804@FreeBSD.org> References: <51536306.5030907@FreeBSD.org> <20130331130409.GO3178@equilibrium.bsdes.net> <C699FE76-B456-49C7-8D3A-DD54F98DAFC1@samsco.org> <515B25D8.7050902@FreeBSD.org> <515BF5AE.4050804@FreeBSD.org>
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[-- Attachment #1 --] I have just sent more information to the PR at http://www.freebsd.org/cgi/query-pr.cgi?pr=157397 The short summary (more info in the PR) is: - limiting tags to 31 does not help - disabling NCQ appears to help in initial testing, but warrants more testing - error happens during WRITE_FPDMA_QUEUED, - File system in question is SU+J UFS2 mounted on /usr, and I can for instance "rm -rf /usr/obj" or just log into GNOME and try to open a gnome-terminal to trigger stalls; - Linux uses 31 tags (for different reason) and has no drive quirks, but a controller quirk; for Jeremy's topic #6, regarding the ATI/AMD SB7x0 that I am using, it might be worthwhile investigating the AHCI_HFLAG_IGN_SERR_INTERNAL flag - it gets set by Linux on the SB700 that my computer is using, see ahci_error_intr() in libahci.h - I am not going to interpret that for lack of expertise, but it does affect error handling and appears to ignore a certain condition. Why only my Samsung HDD drive triggers this but not the WD drive, I do not know yet. Hope that helps a bit. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with undefined - http://www.enigmail.net/ iEYEARECAAYFAlFcqgcACgkQvmGDOQUufZWWaQCeMAxtWxO2tGDhIYihltp7k5vt tG4AoOJs+E3ZKj5bYzdPuOJZASipS4CZ =7HNI -----END PGP SIGNATURE-----
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