On 11/3/25 11:07, Stephen Hemminger wrote:
On Mon, 3 Nov 2025 09:12:39 -0600
Wathsala Vithanage <[email protected]> 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.
It appears in |drivers/dma/cnxk/cnxk_dmadev_fp.c|, perhaps the
maintainer can clarify.
