ethtool_rxfh_ctxs_resize(9)

🌸 ethtool_rxfh_ctxs_resize(9) 🌸

okay so this is a page from the Kernel API Manual, bestie — it's ethtool_rxfh_ctxs_resize(9) and it's giving "quiet little function with a big job" energy ngl 💅

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✨ NAME ✨

ethtool_rxfh_ctxs_resize — resizes, like, all the RSS context indirection tables at once. every single one. no cap 🫶

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✨ SYNOPSIS ✨

void ethtool_rxfh_ctxs_resize (struct net_device *dev , u32
       new_indir_size );

two args, one void, zero drama. she doesn't return anything, she just does 😌

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✨ ARGUMENTS ✨

• dev — the network device 🖧 literally the thing you're doing this to.
• new_indir_size — the new indirection table size, as a u32. this is the size everything is getting resized to, so pick it wisely bestie 🎀

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✨ DESCRIPTION ✨

so here's the vibe: this function resizes the indirection table of every non-default RSS context over to new_indir_size. all of them. together. iconic group activity 💖

⚠️ important!! the caller must have validated with ethtool_rxfh_ctxs_can_resize first. like, first first. this function is not doing the vibe check for you — that's your job. don't skip it 🙈

for each context that gets resized, an ETHTOOL_MSG_RSS_NTF is sent out. one notification per resized context, fr fr 📣

and here's the lowkey smart part: those notifications are sent outside the RSS lock, specifically so nobody's stuck holding the mutex while notification delivery is happening. the way that's just good hygiene ✨🔒

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✨ SEE ALSO ✨

• kernel file ./net/ethtool/common.c
• ethtool_forced_speed_maps_init(9)
• ethtool_rxfh_indir_lost(9)
• ethtool_rxfh_indir_can_resize(9)
• ethtool_rxfh_indir_resize(9)
• ethtool_rxfh_ctxs_can_resize(9)

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and that's the whole page, bestie 🦋 this lil baddie lives in ./net/ethtool, dropped way back in October 2026, and it's part of the Kernel API Manual. go forth and resize responsibly 💜👑