xen_evtchn_nr_channels(9)

✨ xen_evtchn_nr_channels(9) ✨

okay so bestie, welcome to the kernel API manual for xen_evtchn_nr_channels — section 9, kernel API vibes only 💅 this one is short but she's iconic, so let's get into it 🎀

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🌸 NAME 🌸

xen_evtchn_nr_channels — number of usable event channel ports 💖

like, the actual count of ports you can use. not the theoretical max. the usable ones. periodt.

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🦋 SYNOPSIS 🦋

unsigned xen_evtchn_nr_channels (void );

that's it. that's the whole signature. she's lowkey minimal and we respect it 🫶

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🎀 ARGUMENTS 🎀

• void — no arguments, bestie. none. zero. nothing passed in, nothing to worry about 🙈

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👑 DESCRIPTION 👑

so here's the tea ☕ — the number you get back from this may be less than the maximum supported by the current hypervisor ABI. like yes, the hypervisor could support more, but this is the number that's actually usable, iykyk.

💀 do NOT confuse her with the max. if you want the maximum supported, use xen_evtchn_max_channels instead. two different girls, two different jobs. don't mix them up fr fr.

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/xen/events/events_base.c — the source file where this lives 🍓
• notify_remote_via_irq(9)
• xen_set_irq_priority(9)

all three are your little study buddies, go read them 💜

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and that's the whole page!! short and sweet, just how we like her ✨ this was the kernel API manual page for xen_evtchn_nr_channels(9), hanging out in ./drivers/xen/events, dated October 2026 🌸 slay, go count some channels bestie 💅🔥