linux-kernel - Re: [PATCH v3 1/1] iommu/sva: Invalidate KVA range on kernel TLB flush

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Message-ID: <9a649ff4-55fe-478a-bfd7-f3287534499a@intel.com>
Date: Mon, 25 Aug 2025 15:36:39 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: Baolu Lu <baolu.lu@...ux.intel.com>, "Tian, Kevin"
 <kevin.tian@...el.com>, Jason Gunthorpe <jgg@...dia.com>
Cc: Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
 Robin Murphy <robin.murphy@....com>, Jann Horn <jannh@...gle.com>,
 Vasant Hegde <vasant.hegde@....com>, Alistair Popple <apopple@...dia.com>,
 Peter Zijlstra <peterz@...radead.org>, Uladzislau Rezki <urezki@...il.com>,
 Jean-Philippe Brucker <jean-philippe@...aro.org>,
 Andy Lutomirski <luto@...nel.org>, "Lai, Yi1" <yi1.lai@...el.com>,
 "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
 "security@...nel.org" <security@...nel.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: Re: [PATCH v3 1/1] iommu/sva: Invalidate KVA range on kernel TLB
 flush

On 8/22/25 20:26, Baolu Lu wrote:
> +static struct {
> +    /* list for pagetable_dtor_free() */
> +    struct list_head dtor;
> +    /* list for __free_page() */
> +    struct list_head page;
> +    /* list for free_pages() */
> +    struct list_head pages;
> +    /* protect all the ptdesc lists */
> +    spinlock_t lock;
> +    struct work_struct work;

Could you explain a bit why this now needs three separate lists? Seems
like pure overkill.