ethtool_rxfh_indir_lost(9)

🦋 ethtool_rxfh_indir_lost — the "bestie, your RSS table is GONE" warning 💅

okay so real talk, this page lives in the Kernel API Manual (section 9, kernel-land, very much driver-dev territory, iykyk) and it's like... the saddest little notification function in the whole RSS saga 😭

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✨ NAME ✨

ethtool_rxfh_indir_lost — the function that tells the core "bestie... the RSS indirection table? it's gone. lost. missing. not coming to the group chat anymore" 💀

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🌸 SYNOPSIS 🌸

void ethtool_rxfh_indir_lost (struct net_device *dev );

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🎀 ARGUMENTS 🎀

• dev — the network device in question. your little guy. the NIC. the one going through it rn 🫶

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💖 DESCRIPTION 💖

okay so here's the vibe: drivers should call this when the device can no longer maintain the user-configured indirection table. and like, when does that happen? typically after a HW fault recovery that reduced the maximum queue count — so the hardware came back from its little nap but it came back smaller 🙈

the way this works: it marks the default RSS context indirection table as unconfigured, and then it sends an ETHTOOL_MSG_RSS_NTF notification. that's it. that's the whole job. it's giving "I'm just the messenger" energy honestly 💅

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🔥 SEE ALSO 🔥

• the kernel file ./net/ethtool/common.c — that's where the magic happens, go read it, it's iconic 👑
• ethtool_forced_speed_maps_init(9)
• ethtool_rxfh_indir_can_resize(9)
• ethtool_rxfh_indir_resize(9)
• ethtool_rxfh_ctxs_can_resize(9)
• ethtool_rxfh_ctxs_resize(9)

the whole resize cinematic universe honestly, a whole saga, watch them in order 🍓

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ngl bestie, if you're calling this you've probably had a rough day in the driver. sending hugs. the table being unconfigured is not your fault. 💜

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mwah 💋 that's the page! brought to you by the fine folks hanging out in ./net/ethtool, dated October 2026, living in the Kernel API Manual — go forth and notify the core, you absolute icon ⭐