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 --- arch/arc/Kconfig.debug | 10 ++++++++++ 1 file changed, 10 insertions(+) create mode 100644 arch/arc/Kconfig.debug (limited to 'arch/arc/Kconfig.debug') diff --git a/arch/arc/Kconfig.debug b/arch/arc/Kconfig.debug new file mode 100644 index 000000000..45add86de --- /dev/null +++ b/arch/arc/Kconfig.debug @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0 + +config 16KSTACKS + bool "Use 16Kb for kernel stacks instead of 8Kb" + help + If you say Y here the kernel will use a 16Kb stacksize for the + kernel stack attached to each process/thread. The default is 8K. + This increases the resident kernel footprint and will cause less + threads to run on the system and also increase the pressure + on the VM subsystem for higher order allocations. -- cgit v1.3.1