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Mon, 29 Dec 2025 14:53:45 +0000 Message-ID: <38f70791-56b6-4795-876d-b84df289dbd8@intel.com> Date: Mon, 29 Dec 2025 16:53:38 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [Intel-wired-lan] [PATCH iwl-net v2] igc: Reduce TSN TX packet buffer from 7KB to 5KB per queue To: Chwee-Lin Choong , Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S . 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Reducing to 5 KB avoids these hangs and matches > the TSN recommendation in I225/I226 SW User Manual Section 7.5.4. > > The 8 KB “freed” by this change is currently unused. This reduction > is not expected to impact throughput, as the i226 is PCIe-limited > for small TSN packets rather than TX-buffer-limited. > > Fixes: 0d58cdc902da ("igc: optimize TX packet buffer utilization for TSN mode") > Reported-by: Zdenek Bouska > Closes: https://lore.kernel.org/netdev/AS1PR10MB5675DBFE7CE5F2A9336ABFA4EBEAA@AS1PR10MB5675.EURPRD10.PROD.OUTLOOK.COM/ > Reviewed-by: Paul Menzel > Reviewed-by: Simon Horman > Reviewed-by: Aleksandr Loktionov > Signed-off-by: Chwee-Lin Choong > --- > v1: https://patchwork.ozlabs.org/project/intel-wired-lan/patch/20250918183811.31270-1-chwee.lin.choong@intel.com/ > > changelog: > v1 -> v2 > - Elaborated commit message > --- > drivers/net/ethernet/intel/igc/igc_defines.h | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > Tested-by: Avigail Dahan