From: James Morris <jmorris@namei.org>
To: Yangyu Chen <cyy@cyyself.name>
Cc: anup@brainfault.org, atish.patra@linux.dev, pjw@kernel.org,
palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr,
kvm@vger.kernel.org, kvm-riscv@lists.infradead.org,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org, Jason Montleon <jmontleo@redhat.com>
Subject: Re: [PATCH] RISC-V: KVM: Fix G-stage page table memory leak on VM destroy
Date: Sun, 8 Nov 2026 23:50:16 -0800 (PST) [thread overview]
Message-ID: <81ddd9e-791-9ca-3f3-f8381c785cd@namei.org> (raw)
In-Reply-To: <tencent_C8B170AF63DC42F81A47F9EA044BB4B11C09@qq.com>
On Sat, 31 Oct 2026, Yangyu Chen wrote:
> Fixes: 9d05c1fee837 ("RISC-V: KVM: Implement stage2 page table programming")
> Cc: stable@vger.kernel.org
> Signed-off-by: Yangyu Chen <cyy@cyyself.name>
Tested-by: James Morris <jmorris@namei.org>
Assisted by an LLM.
On a SpacemiT K3 CoM260 host (Sv39x4), a native port of your reproducer
showed about 16 MiB lost per VM on Fedora's 7.3.1 kernel. With the same
source rebuilt with this patch, each run averaged under 0.1 MiB lost per
VM (130 measured VMs total), consistent with noise. Both figures count
free pages held on the per-CPU lists as free.
--
James Morris
<jmorris@namei.org>
next prev parent reply other threads:[~2026-11-09 7:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-30 18:58 Yangyu Chen
2026-11-09 7:50 ` James Morris [this message]
2026-11-13 12:16 ` Anup Patel
2026-11-13 13:18 ` Yangyu Chen
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