Attachment 15793 Details for Bug 14280 – WHATSNEW announcement

[patch] WHATSNEW announcement

tmp412.diff.txt (text/plain), 1.42 KB, created by Stefan Metzmacher on 2020-02-17 14:48:59 UTC

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Creator: Stefan Metzmacher

Created: 2020-02-17 14:48:59 UTC

Size: 1.42 KB

patch

obsolete

>From de3e77dfc5e97aec8fc5c552e494c7360cb4983d Mon Sep 17 00:00:00 2001
>From: Stefan Metzmacher <metze@samba.org>
>Date: Mon, 17 Feb 2020 15:46:53 +0100
>Subject: [PATCH] WHATSNEW: announce vfs_io_uring
>
>Signed-off-by: Stefan Metzmacher <metze@samba.org>
>---
> WHATSNEW.txt | 19 +++++++++++++++++++
> 1 file changed, 19 insertions(+)
>
>diff --git a/WHATSNEW.txt b/WHATSNEW.txt
>index 9a521a973a94..e3e72fef5b7c 100644
>--- a/WHATSNEW.txt
>+++ b/WHATSNEW.txt
>@@ -77,6 +77,25 @@ to-be-ignored timestamp variables passed to the SMB_VFS_NTIMES() VFS function.
> VFS modules can check whether any of the time values inside a struct
> smb_file_time is to be ignored by calling is_omit_timespec() on the value.
> 
>+'io_uring' vfs module
>+---------------------
>+
>+The module makes use of the new io_uring infrastructure
>+(intruduced in Linux 5.1), see https://lwn.net/Articles/776703/
>+
>+Currently this implements SMB_VFS_{PREAD,PWRITE,FSYNC}_SEND/RECV
>+and avoids the overhead of the userspace threadpool in the default
>+vfs backend. See also vfs_io_uring(8).
>+
>+In order to build the module you need the liburing userspace library
>+and its developement headers installed, see
>+https://git.kernel.dk/cgit/liburing/
>+
>+At runtime you'll need a Linux kernel with version 5.1 or higher.
>+Note that 5.4.14 and 5.4.15 have a regression that breaks the Samba
>+module! The regression got fixed was fixed in Linux 5.4.16 again.
>+
>+
> REMOVED FEATURES
> ================
> 
>-- 
>2.17.1
>

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