From: Jakub Kicinski <kuba@kernel.org>
To: Dipayaan Roy <dipayanroy@linux.microsoft.com>
Cc: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org,
decui@microsoft.com, andrew+netdev@lunn.ch, davem@davemloft.net,
edumazet@google.com, pabeni@redhat.com, leon@kernel.org,
longli@microsoft.com, kotaranov@microsoft.com, horms@kernel.org,
shradhagupta@linux.microsoft.com, ssengar@linux.microsoft.com,
ernis@linux.microsoft.com, shirazsaleem@microsoft.com,
linux-hyperv@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org,
stephen@networkplumber.org, jacob.e.keller@intel.com,
dipayanroy@microsoft.com, leitao@debian.org, kees@kernel.org,
john.fastabend@gmail.com, hawk@kernel.org, bpf@vger.kernel.org,
daniel@iogearbox.net, ast@kernel.org, sdf@fomichev.me,
yury.norov@gmail.com
Subject: Re: [RFC PATCH net-next] net: mana: Force single RX buffer per page under SWIOTLB bounce modes
Date: Mon, 27 Apr 2026 15:44:29 -0700 [thread overview]
Message-ID: <20260427154429.6a141824@kernel.org> (raw)
In-Reply-To: <ae91hyrLf4n23XE6@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net>
On Mon, 27 Apr 2026 07:41:11 -0700 Dipayaan Roy wrote:
> In both cases, sub-page RX buffer fragments allocated via page_pool may
> not be compatible with bounce buffering in this mode, leading to failures
> in the RX path.
What does it mean to not be compatible with swiotlb?
Normally that indicates that DMA API is mis-used.
prev parent reply other threads:[~2026-04-27 22:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-27 14:41 [RFC PATCH net-next] net: mana: Force single RX buffer per page under SWIOTLB bounce modes Dipayaan Roy
2026-04-27 22:44 ` Jakub Kicinski [this message]
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