Date: Sun, 24 Aug 2008 14:57:52 +1000 From: Antony Mawer <fbsd-current@mawer.org> To: Volker <volker@vwsoft.com> Cc: usb@freebsd.org, freebsd-usb@freebsd.org, current@freebsd.org Subject: Re: HEADSUP new usb code coming in. Message-ID: <48B0EA50.2090105@mawer.org> In-Reply-To: <48AFE196.7050100@vwsoft.com> References: <20080819211814.6CD685B4D@mail.bitblocks.com> <20080819.160510.104119134.imp@bsdimp.com> <48AB566B.5010507@mawer.org> <20080819.180450.-867152686.imp@bsdimp.com> <48ABB1FA.5070609@mawer.org> <48AFE196.7050100@vwsoft.com>
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On 23/08/2008 8:08 PM, Volker wrote: > On 12/23/-58 20:59, Antony Mawer wrote: >> M. Warner Losh wrote: >>> In message: <48AB566B.5010507@mawer.org> >>> Antony Mawer <fbsd-current@mawer.org> writes: >>> : Warner Losh wrote: >>> : > From: Bakul Shah <bakul@bitblocks.com> >>> : > Subject: Re: HEADSUP new usb code coming in. : > Date: Tue, 19 Aug >>> 2008 14:18:13 -0700 >>> : > : >> On Tue, 19 Aug 2008 22:44:20 +0200 Hans Petter Selasky >>> <hselasky@c2i.net> wrote: >>> : >>> New stuff (all of which I can remember right now): >>> : >> ... >>> : >> >>> : >> Accidentally unplugging a mounted USB disk (without >>> : >> unmounting it) resulted in a hang or a crash. Is this fixed? >>> : > : > That's fixed in -current right now with the old stack. It >>> isn't a usb >>> : > issue at all, but a buffer cache issue. >>> : : Is this change that is likely to be MFC'd in time for 7.1? And/or >>> is : there a specific patch that can manually be applied to -STABLE to >>> fix this? >>> >>> I should spend the time to dig into the changes in current. There >>> turned out to be several little changes... And I need to verify all >>> the edge cases were covered... >> I'd be happy to test patches if you do end up doing this.. it would be >> really nice to have in 7.1, or at least available as a patchset if it >> isn't suitable for MFC (eg. ABI changes)... > > I'm a bit behind with reading emails. Please forgive me if this has > already been answered. > > Don't expect the new USB stack for 7.1-R. It's too short and the new USB > stack will introduce an ABI breakage. For that, all drivers written for > the old USB stack need to be rewritten and I guess, we need to take care > about 3rd party developers and inform them in advance about that massive > change. I would not wonder if this will never get MFC'd but I don't know > actually. This wasn't about the new USB stack -- we were discussing the buffer cache and CAM-related fixes that prevents the system from panic'ing when a USB device is unplugged without first unmounting the filesystem. These patches are in HEAD with the existing USB stack. :-) --Antony
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