From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- Documentation/ABI/testing/sysfs-class-vduse | 33 +++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-class-vduse (limited to 'Documentation/ABI/testing/sysfs-class-vduse') diff --git a/Documentation/ABI/testing/sysfs-class-vduse b/Documentation/ABI/testing/sysfs-class-vduse new file mode 100644 index 000000000..2f2bc5c8f --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-vduse @@ -0,0 +1,33 @@ +What: /sys/class/vduse/ +Date: Oct 2021 +KernelVersion: 5.15 +Contact: Yongji Xie +Description: + The vduse/ class sub-directory belongs to the VDUSE + framework and provides a sysfs interface for configuring + VDUSE devices. + +What: /sys/class/vduse/control/ +Date: Oct 2021 +KernelVersion: 5.15 +Contact: Yongji Xie +Description: + This directory entry is created for the control device + of VDUSE framework. + +What: /sys/class/vduse// +Date: Oct 2021 +KernelVersion: 5.15 +Contact: Yongji Xie +Description: + This directory entry is created when a VDUSE device is + created via the control device. + +What: /sys/class/vduse//msg_timeout +Date: Oct 2021 +KernelVersion: 5.15 +Contact: Yongji Xie +Description: + (RW) The timeout (in seconds) for waiting for the control + message's response from userspace. Default value is 30s. + Writing a '0' to the file means to disable the timeout. -- cgit v1.3.1