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| author | Hans Petter Selasky <hselasky@FreeBSD.org> | 2019-09-20 11:00:02 +0000 |
|---|---|---|
| committer | Hans Petter Selasky <hselasky@FreeBSD.org> | 2019-09-20 11:00:02 +0000 |
| commit | 4631d7f71787c707ce5a37a337d96c82644d8f3d (patch) | |
| tree | 7f9bf8a03601bfa3b54cdb44a8186a403804fbfa /sys/dev | |
| parent | 4e792e431a92f12f2be7acb20d78f7f2637d659c (diff) | |
| download | src-4631d7f71787c707ce5a37a337d96c82644d8f3d.tar.gz src-4631d7f71787c707ce5a37a337d96c82644d8f3d.zip | |
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
Notes
Notes:
svn path=/head/; revision=352555
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/usb/usb_ioctl.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/dev/usb/usb_ioctl.h b/sys/dev/usb/usb_ioctl.h index e7e63fb9a895..c4023cab5f16 100644 --- a/sys/dev/usb/usb_ioctl.h +++ b/sys/dev/usb/usb_ioctl.h @@ -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 */ |