From: Catalin Marinas <catalin.marinas@arm.com>
To: "Aneesh Kumar K.V (Arm)" <aneesh.kumar@kernel.org>
Cc: iommu@lists.linux.dev, linux-kernel@vger.kernel.org,
Robin Murphy <robin.murphy@arm.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
Steven Price <steven.price@arm.com>,
Suzuki K Poulose <Suzuki.Poulose@arm.com>,
Jiri Pirko <jiri@resnulli.us>, Jason Gunthorpe <jgg@ziepe.ca>,
Mostafa Saleh <smostafa@google.com>,
Petr Tesarik <ptesarik@suse.com>,
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Xu Yilun <yilun.xu@linux.intel.com>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
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Nicholas Piggin <npiggin@gmail.com>,
"Christophe Leroy (CS GROUP)" <chleroy@kernel.org>,
Alexander Gordeev <agordeev@linux.ibm.com>,
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Jiaxun Yang <jiaxun.yang@flygoat.com>,
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Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev,
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x86@kernel.org
Subject: Re: [PATCH v5 2/6] dma: swiotlb: Track whether the pool size was explicitly set
Date: Mon, 21 Sep 2026 13:50:10 +0100 [thread overview]
Message-ID: <arEoAq9mhsx2mt1P@arm.com> (raw)
In-Reply-To: <20260921063628.362078-3-aneesh.kumar@kernel.org>
On Mon, Sep 21, 2026 at 12:06:24PM +0530, Aneesh Kumar K.V (Arm) wrote:
> swiotlb_adjust_size() must not override a pool size supplied through the
> swiotlb= command-line parameter.
>
> Currently, it determines whether a size was supplied by comparing
> default_nslabs with IO_TLB_DEFAULT_SIZE. This fails when the user
> explicitly requests the compiled-in default size, allowing the request
> to be overwritten by automatic pool sizing.
>
> Record whether swiotlb= supplied a numeric size and add
> swiotlb_default_size_changed() to query that state.
>
> Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
next prev parent reply other threads:[~2026-09-21 12:50 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-21 6:36 [PATCH v5 0/6] dma: swiotlb: Centralize default pool policy and sizing Aneesh Kumar K.V (Arm)
2026-09-21 6:36 ` [PATCH v5 1/6] dma: swiotlb: Centralize default pool policy selection Aneesh Kumar K.V (Arm)
2026-09-21 15:25 ` Robin Murphy
2026-09-22 5:32 ` Aneesh Kumar K.V
2026-09-21 6:36 ` [PATCH v5 2/6] dma: swiotlb: Track whether the pool size was explicitly set Aneesh Kumar K.V (Arm)
2026-09-21 12:50 ` Catalin Marinas [this message]
2026-09-21 15:45 ` Robin Murphy
2026-09-22 5:42 ` Aneesh Kumar K.V
2026-09-21 6:36 ` [PATCH v5 3/6] dma: swiotlb: Centralize minimal pool sizing Aneesh Kumar K.V (Arm)
2026-09-21 12:52 ` Catalin Marinas
2026-09-21 16:49 ` Robin Murphy
2026-09-22 6:56 ` Aneesh Kumar K.V
2026-09-21 6:36 ` [PATCH v5 4/6] dma: swiotlb: Centralize memory-encryption " Aneesh Kumar K.V (Arm)
2026-09-21 6:36 ` [PATCH v5 5/6] dma: swiotlb: Add an overridable architecture pool opt-out Aneesh Kumar K.V (Arm)
2026-09-21 6:36 ` [PATCH v5 6/6] dma: swiotlb: Remove SWIOTLB_ANY Aneesh Kumar K.V (Arm)
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