swsusp_write(9)

🌀 swsusp_write(9) — the Kernel API Manual, bestie edition

okay so this is swsusp_write from the kernel API manual (section 9, the fancy kernel-doc section, iykyk) — and it's lowkey the main character of hibernation, because it's the one that writes the entire image and the metadata. periodt. 💅

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✨ NAME ✨

swsusp_write — write the entire image and the metadata. that's it, that's the whole vibe. 💖

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🦋 SYNOPSIS 🦋

int swsusp_write(unsigned int flags);

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🎀 ARGUMENTS 🎀

• flags — the flags you pass along to the "boot" kernel, tucked right into the image header. so like, bestie, these aren't just for us — they travel with the image. ✨

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🌸 DESCRIPTION 🌸

okay so here's the thing, and I need you to listen: it is important _NOT_ to umount filesystems at this point. like, do not do it. 🫶

we do want them synced (in case something goes wrong, we want everything flushed out) but we DO not want to mark the filesystem clean — because it is not clean. it is literally not. 💀

and if you're spiralling about that: it does not matter, because if we resume correctly, we'll mark the system clean anyway. so. breathe. 🙈

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⭐ RETURN ⭐

0 on success, a negative error code on failure. no cap. 🍓

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👑 SEE ALSO 👑

kernel file ./kernel/power/swap.c, plus the rest of the squad:

• swsusp_read(9)
• swsusp_check(9)
• swsusp_close(9)
• swsusp_unmark(9)

they're all in ./kernel/power, they're all iconic, go read them. 🧚

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and that's the page!! this lil beauty lives under ./kernel/power, dated October 2026, and it's page swsusp_write(9) of the Kernel API Manual — mwah, go sync responsibly, love u, bye 💜🎀