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 --- drivers/md/bcache/Kconfig | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 drivers/md/bcache/Kconfig (limited to 'drivers/md/bcache/Kconfig') diff --git a/drivers/md/bcache/Kconfig b/drivers/md/bcache/Kconfig new file mode 100644 index 000000000..b2d10063d --- /dev/null +++ b/drivers/md/bcache/Kconfig @@ -0,0 +1,30 @@ +# SPDX-License-Identifier: GPL-2.0-only + +config BCACHE + tristate "Block device as cache" + select BLOCK_HOLDER_DEPRECATED if SYSFS + select CRC64 + select CLOSURES + help + Allows a block device to be used as cache for other devices; uses + a btree for indexing and the layout is optimized for SSDs. + + See Documentation/admin-guide/bcache.rst for details. + +config BCACHE_DEBUG + bool "Bcache debugging" + depends on BCACHE + help + Don't select this option unless you're a developer + + Enables extra debugging tools, allows expensive runtime checks to be + turned on. + +config BCACHE_ASYNC_REGISTRATION + bool "Asynchronous device registration" + depends on BCACHE + help + Add a sysfs file /sys/fs/bcache/register_async. Writing registering + device path into this file will returns immediately and the real + registration work is handled in kernel work queue in asynchronous + way. -- cgit v1.3.1