Date: Sun, 20 Jul 2003 13:49:42 -0400 (EDT) From: Andre Guibert de Bruet <andy@siliconlandmark.com> To: Harald Schmalzbauer <h@schmalzbauer.de> Cc: current@freebsd.org Subject: RE: where is kern.ca.da.no_6_byte? Message-ID: <20030720134531.F19406@alpha.siliconlandmark.com> In-Reply-To: <GHEOJEPHNBOPAMKOBHNIAEEDCFAA.h@schmalzbauer.de> References: <GHEOJEPHNBOPAMKOBHNIAEEDCFAA.h@schmalzbauer.de>
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On Sun, 20 Jul 2003, Harald Schmalzbauer wrote: > Andre Guibert de Bruet wrote: > > On Sun, 20 Jul 2003, Harald Schmalzbauer wrote: > > > > > Kenneth D. Merry wrote: > > > > > seems that this sysctl doesn't exist any more! > > > > > Is there anything similar? > > > > > > > > It has been renamed: > > > > kern.cam.da.%d.minimum_cmd_size > > > > > > > > Where %d is the unit number for the da(4) device. > > > > > > Thaks a lot! Where can I find such info? I looked via cvsweb > > for scsi_da.c > > > but couldn't find anything. Is it possible to list all kernel tunables? > > > > sysctl -a. You'll probably want to pipe it's output to your favorite > > pager. "sysctl kern" will list just the entries in the kern MIB. > > OIC. It's not available until the device is pluged in, which makes it > absolutely useless. > When I plug it in the machine behaves abnormal, so I need to set it BEFORE > connecting USB devices. > Why has this tunable by default a value which makes the machine unstable by > every umass I plug in which has no "qirk" entry? And if I look how many > quirks there are I assume that almost every device needs no_6byte set. > Why not make it default? Perhaps this would prevent criminal people from > intentionally crashing servers when intruding my serverroom armed with > dozends of USB devices;) I don't mean to defend the current state of the USB stack not recovering from errors and bad behavior, but ask yourself: "Do I really want USB enabled on my servers?" For most people, the answer is a resounding "No". Food for thought. Regards, > Andre Guibert de Bruet | Enterprise Software Consultant > > Silicon Landmark, LLC. | http://siliconlandmark.com/ >
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