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Date:      Mon, 28 Jan 2002 01:09:29 +0000
From:      Josef Karthauser <joe@tao.org.uk>
To:        Alfred Perlstein <bright@mu.org>
Cc:        Josef Karthauser <joe@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject:   Re: cvs commit: src/sys/dev/usb usb.c
Message-ID:  <20020128010929.A2921@genius.tao.org.uk>
In-Reply-To: <20020127170452.M13686@elvis.mu.org>; from bright@mu.org on Sun, Jan 27, 2002 at 05:04:52PM -0800
References:  <200201261240.g0QCe3G07014@freefall.freebsd.org> <20020127170452.M13686@elvis.mu.org>

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On Sun, Jan 27, 2002 at 05:04:52PM -0800, Alfred Perlstein wrote:

> >       usb.c:      revision 1.41
> >  =20
> >           revision 1.41
> >           date: 2000/03/16 00:46:38;  author: augustss;  lines: +2 -2
> >           Make the USB event queue longer.  Mine overflows before the
> >           (user-land) event handler has started.  But then I have
> >           about 25 devices connected. :)
> >  =20
> >   Revision  Changes    Path
> >   1.49      +1 -1      src/sys/dev/usb/usb.c
>=20
> How many events can be pending and what sort of information can they
> contain?  It might make sense to look at having the device provide the
> buffer needed via jnesting it in the softc.

They're just control messages that can be read via /dev/usbX. The
usbd uses them. The constant that was changed only affects the
maximum length of a queue. There's no extra storage used unless
we really have that many events queuing, if that's your worry.

Joe

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