From: Jason Gunthorpe <jgg@ziepe.ca>
To: Pranjal Shrivastava <praan@google.com>
Cc: Nafees Ahmed Abdul <nafeabd@amazon.com>,
joro@8bytes.org, will@kernel.org, robin.murphy@arm.com,
iommu@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH] iommu: Default to lazy DMA mode on ARM64
Date: Mon, 6 Apr 2026 19:43:14 -0300 [thread overview]
Message-ID: <20260406224314.GL2551565@ziepe.ca> (raw)
In-Reply-To: <ac8lwTT0oQNT-JaL@google.com>
On Fri, Apr 03, 2026 at 02:28:17AM +0000, Pranjal Shrivastava wrote:
> Thanks for the patch and the benchmarks.
>
> However, I'm not sure why should we change the compile-time default for
> all ARM64 systems? Currently, users can already achieve this behavior by
> using the `iommu.strict=0` boot parameter.
Personally I really dislike these rando arch specific things.
What justification is there for any arch to be unique here?
I'd expect a single kconfig 'try to be strict by default' and that's
it. No arch override.
Jason
next prev parent reply other threads:[~2026-04-06 22:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-02 19:59 [RFC PATCH] iommu: Default to lazy DMA mode on ARM64 Nafees Ahmed Abdul
2026-04-03 2:28 ` Pranjal Shrivastava
2026-04-06 22:43 ` Jason Gunthorpe [this message]
2026-04-07 11:25 ` Robin Murphy
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