Date: Fri, 19 May 2017 10:24:58 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-usb@FreeBSD.org Subject: [Bug 219220] syscalls (ioctls) on USB devices are very slow Message-ID: <bug-219220-17-62qvsNHWey@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-219220-17@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219220 --- Comment #35 from Hans Petter Selasky <hselasky@FreeBSD.org> --- Hi, Each USB device instance has a global SX lock. This lock is held during detach. usbconfig also acquire this lock. If the USB detach cannot complete, because character devices towards user-space cannot be destroyed, because user-space apps via libusb keep file /dev/ugenX.Y handles open, then enumeration will appear frozen until this situation is resolved? Is that more clear? --HPS -- You are receiving this mail because: You are the assignee for the bug.home | help
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