dev_coredumpv(9)

💅 dev_coredumpv(9) — like, the kernel API manual bestie ✨

okay so real talk, this is a page from the Kernel API Manual and honestly? it's giving "short but mighty" 🎀 so let's get into it before the vibe check expires.

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🌸 NAME 🌸

dev_coredumpv — create a device coredump using vmalloc data 🫶 literally that's the whole name and it ate.

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✨ SYNOPSIS ✨

void dev_coredumpv (struct device *dev , void *data , size_t datalen ,
gfp_t gfp );

not me copying this character for character because bestie, the details are sacred 💖

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🦋 ARGUMENTS 🦋

• dev — the struct device for the crashed device 😭 yes, the one that had a bad day. this is how we tell the kernel which device we're dumping about.
• data — the vmalloc data that contains the device coredump. this is the actual payload, the main character of the whole operation 👑
• datalen — the length of the data. how many bytes we're working with, no cap 📏
• gfp — allocation flags. the classic gfp_t situation, you know how it is 🧚

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💜 DESCRIPTION 💜

okay so this is the important bit, listen up 🔥

This function takes ownership of the vmalloc'ed data and will free it when it is no longer used. so like... it's yours now, kernel. handle it responsibly 🙈

heads up bestie: once you hand that data over, dev_coredumpv is the one who frees it eventually. ownership transferred, periodt. 💅

and for more info? go see dev_coredumpm. that's the one with the lore iykyk 🌈

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🍓 SEE ALSO 🍓

Kernel file ./drivers/base/devcoredump.c plus this whole squad of related functions — go read them, they're iconic 👑

• devcd_free_sgtable(9)
• devcd_read_from_sgtable(9)
• dev_coredump_put(9)
• dev_coredumpm_timeout(9)
• dev_coredumpsg(9)

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⭐ a lil sign-off ⭐

so this page lives under ./drivers/base (that's its source/version home 🏠) and it's dated October 2026 — yes, the future, because kernel docs are always ahead of the game fr fr. anyway bestie, go dump those cores responsibly, mwah 💋🦋✨