From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Gal Pressman <gal@nvidia.com>
Cc: "David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Andrew Lunn <andrew+netdev@lunn.ch>,
netdev@vger.kernel.org, Aaron Conole <aconole@redhat.com>,
Eelco Chaudron <echaudro@redhat.com>,
Ilya Maximets <i.maximets@ovn.org>,
Simon Horman <horms@kernel.org>,
Clark Williams <clrkwllms@kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
dev@openvswitch.org, linux-rt-devel@lists.linux.dev
Subject: Re: [PATCH net 0/3] Revert openvswitch per-CPU storage
Date: Tue, 10 Jun 2025 08:43:16 +0200 [thread overview]
Message-ID: <20250610064316.JbrCJTuL@linutronix.de> (raw)
In-Reply-To: <20250610062631.1645885-1-gal@nvidia.com>
On 2025-06-10 09:26:28 [+0300], Gal Pressman wrote:
> This patch series reverts a set of changes that consolidated per-CPU
> storage structures in the openvswitch module.
>
> The original changes were intended to improve performance and reduce
> complexity by merging three separate per-CPU structures into one, but
> they have changed openvswitch to use static percpu allocations, and
> exhausted the reserved chunk on module init.
> This results in allocation of struct ovs_pcpu_storage (6488 bytes)
> failure on ARM.
>
> The reverts are applied in reverse order of the original commits.
Is the limited per-CPU storage the only problem? If so I would towards a
different solution rather than reverting everything.
I assume a defconfig on arm is everything that is needed to reproduce
this.
Sebastian
next prev parent reply other threads:[~2025-06-10 6:43 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-10 6:26 [PATCH net 0/3] Revert openvswitch per-CPU storage Gal Pressman
2025-06-10 6:26 ` [PATCH net 1/3] Revert "openvswitch: Move ovs_frag_data_storage into the struct ovs_pcpu_storage" Gal Pressman
2025-06-10 6:26 ` [PATCH net 2/3] Revert "openvswitch: Use nested-BH locking for ovs_pcpu_storage" Gal Pressman
2025-06-10 6:26 ` [PATCH net 3/3] Revert "openvswitch: Merge three per-CPU structures into one" Gal Pressman
2025-06-10 6:43 ` Sebastian Andrzej Siewior [this message]
2025-06-10 7:03 ` [PATCH net 0/3] Revert openvswitch per-CPU storage Gal Pressman
2025-06-10 7:06 ` Sebastian Andrzej Siewior
2025-06-10 7:08 ` Gal Pressman
2025-06-11 6:59 ` Sebastian Andrzej Siewior
2025-06-11 11:56 ` Gal Pressman
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