[RFC PATCH 0/1] vmxnet3: Adjust maximum Rx ring buffer size

Aaron Tomlin
2025-01-05T21:30:40Z

Hi Ronak, Paolo,

I managed to trigger the MAX_PAGE_ORDER warning in the context of function
__alloc_pages_noprof() with /usr/sbin/ethtool --set-ring rx 4096 rx-mini
2048 [devname]' using the maximum supported Ring 0 and Rx ring buffer size.
Admittedly this was under the stock Linux kernel-4.18.0-477.27.1.el8_8
whereby CONFIG_CMA is not enabled. I think it does not make sense to
attempt a large memory allocation request for physically contiguous memory,
to hold the Rx Data ring that could exceed the maximum page-order supported
by the system.

I am not familiar with drivers/net/vmxnet3 related code.
Please let me know your thoughts. Thank you.

Aaron Tomlin (1):
vmxnet3: Adjust maximum Rx ring buffer size

drivers/net/vmxnet3/vmxnet3_defs.h | 4 ++++
1 file changed, 4 insertions(+)

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2.47.1