Date: Mon, 7 Oct 2019 15:25:00 +0000 (UTC) From: Hans Petter Selasky <hselasky@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-releng@freebsd.org Subject: svn commit: r353278 - releng/12.1/sys/dev/usb Message-ID: <201910071525.x97FP0D2006582@repo.freebsd.org>
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Author: hselasky Date: Mon Oct 7 15:25:00 2019 New Revision: 353278 URL: https://svnweb.freebsd.org/changeset/base/353278 Log: MFS r353173: 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 Sponsored by: Mellanox Technologies Approved by: re (gjb) Modified: releng/12.1/sys/dev/usb/usb_ioctl.h Directory Properties: releng/12.1/ (props changed) Modified: releng/12.1/sys/dev/usb/usb_ioctl.h ============================================================================== --- releng/12.1/sys/dev/usb/usb_ioctl.h Mon Oct 7 15:03:24 2019 (r353277) +++ releng/12.1/sys/dev/usb/usb_ioctl.h Mon Oct 7 15:25:00 2019 (r353278) @@ -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 */
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