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'\" t
.\" Title: vfs_io_uring
.\" Author: [see the "AUTHOR" section]
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\" Date: 02/20/2024
.\" Manual: System Administration tools
.\" Source: Samba 4.19.5-git.342.57620c4f7eSUSE-oS16.9-x86_64
.\" Language: English
.\"
.TH "VFS_IO_URING" "8" "02/20/2024" "Samba 4\&.19\&.5\-git\&.342\&." "System Administration tools"
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.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.ie \n(.g .ds Aq \(aq
.el .ds Aq '
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.nh
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.\" * MAIN CONTENT STARTS HERE *
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.SH "NAME"
vfs_io_uring \- Implement async io in Samba vfs using io_uring of Linux (>= 5\&.1)\&.
.SH "SYNOPSIS"
.HP \w'\ 'u
vfs objects = io_uring
.SH "DESCRIPTION"
.PP
This VFS module is part of the
\fBsamba\fR(7)
suite\&.
.PP
The
io_uring
VFS module enables asynchronous pread, pwrite and fsync using the io_uring infrastructure of Linux (>= 5\&.1)\&. This provides much less overhead compared to the usage of the pthreadpool for async io\&.
.PP
This module SHOULD be listed last in any module stack as it requires real kernel file descriptors\&.
.SH "EXAMPLES"
.PP
Straight forward use:
.sp
.if n \{\
.RS 4
.\}
.nf
\fI[cooldata]\fR
\m[blue]\fBpath = /data/ice\fR\m[]
\m[blue]\fBvfs objects = io_uring\fR\m[]
.fi
.if n \{\
.RE
.\}
.SH "OPTIONS"
.PP
io_uring:num_entries = NUMBER_OF_QUEUE_ENTRIES
.RS 4
The number of entries in the submission queue\&. The maximum allowed value depends on the kernel version and the kernel will roundup the value to a power of 2\&.
.sp
The default is \*(Aq128\*(Aq\&.
.RE
.PP
io_uring:sqpoll = BOOL
.RS 4
Use the IORING_SETUP_SQPOLL feature\&.
.sp
The default is \*(Aqno\*(Aq\&.
.RE
.SH "SEE ALSO"
.PP
\fBio_uring_setup\fR(2)\&.
.SH "VERSION"
.PP
This man page is part of version 4\&.19\&.5\-git\&.342\&.57620c4f7eSUSE\-oS16\&.9\-x86_64 of the Samba suite\&.
.SH "AUTHOR"
.PP
The original Samba software and related utilities were created by Andrew Tridgell\&. Samba is now developed by the Samba Team as an Open Source project similar to the way the Linux kernel is developed\&.
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