From: Stephen Hemminger <stephen@networkplumber.org>
To: Wathsala Vithanage <wathsala.vithanage@arm.com>
Cc: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>,
Tyler Retzlaff <roretzla@linux.microsoft.com>,
dev@dpdk.org, Ola Liljedahl <ola.liljedahl@arm.com>,
vattunuru@marvell.com
Subject: Re: [PATCH 1/1] eal: correct memory ordering in MCS lock
Date: Mon, 3 Nov 2025 09:07:17 -0800 [thread overview]
Message-ID: <20251103090717.2d181d95@phoenix> (raw)
In-Reply-To: <f08a5a55-2a46-4f8c-9658-f7c320de57f2@arm.com>
On Mon, 3 Nov 2025 09:12:39 -0600
Wathsala Vithanage <wathsala.vithanage@arm.com> wrote:
> MCS lock is broken, it's just a matter of time it will run into a deadlock.
>
> drivers/dma/cnxk is a user of MCS lock.
I am surprised that a driver would use mcslock.
MCSlock is targeted at case of large number of CPU's with lots of contention.
It will likely be slower than spinlock or ticketlock for the use case of driver.
next prev parent reply other threads:[~2025-11-03 17:07 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-23 18:47 Wathsala Vithanage
2025-11-03 15:12 ` Wathsala Vithanage
2025-11-03 17:07 ` Stephen Hemminger [this message]
2025-11-03 17:30 ` Wathsala Vithanage
2025-11-03 18:06 ` Konstantin Ananyev
2025-11-03 18:47 ` Wathsala Vithanage
2025-11-03 18:48 ` Stephen Hemminger
2025-11-03 19:13 ` Wathsala Vithanage
2025-11-04 8:18 ` Konstantin Ananyev
2025-11-03 23:48 ` Stephen Hemminger
2025-11-04 23:30 ` Wathsala Vithanage
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