Date: Fri, 20 Sep 2019 11:00:03 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r352555 - head/sys/dev/usb Message-ID: <201909201100.x8KB03er034488@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: hselasky Date: Fri Sep 20 11:00:02 2019 New Revision: 352555 URL: https://svnweb.freebsd.org/changeset/base/352555 Log: Increase the maximum user-space buffer size from 256kBytes to 32MBytes for libusb. This is useful for speeding up large data transfers while reducing the interrupt rate. Found at: EuroBSDcon 2019 MFC after: 1 week Sponsored by: Mellanox Technologies Modified: head/sys/dev/usb/usb_ioctl.h Modified: head/sys/dev/usb/usb_ioctl.h ============================================================================== --- head/sys/dev/usb/usb_ioctl.h Fri Sep 20 10:56:13 2019 (r352554) +++ head/sys/dev/usb/usb_ioctl.h Fri Sep 20 11:00:02 2019 (r352555) @@ -224,7 +224,7 @@ struct usb_fs_uninit { } USB_IOCTL_STRUCT_ALIGN(1); struct usb_fs_open { -#define USB_FS_MAX_BUFSIZE (1 << 18) +#define USB_FS_MAX_BUFSIZE (1 << 25) /* 32 MBytes */ uint32_t max_bufsize; #define USB_FS_MAX_FRAMES (1U << 12) #define USB_FS_MAX_FRAMES_PRE_SCALE (1U << 31) /* for ISOCHRONOUS transfers */
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201909201100.x8KB03er034488>