gfs2_page_mkwrite(9)

🦋 gfs2_page_mkwrite(9) 🦋

okay so this is a page from the Kernel API Manual, section 9 (iykyk), and it's literally all about gfs2_page_mkwrite — bestie, come sit with me 💅

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✨ NAME ✨

gfs2_page_mkwrite — make a shared, mmap()ed, page writable 🫶

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🌸 SYNOPSIS 🌸

vm_fault_t gfs2_page_mkwrite (struct vm_fault *vmf );

like, that's the whole signature, no cap ✨

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🎀 ARGUMENTS 🎀

• vmf — the virtual memory fault that's carrying the page we want to make writable. like, the page is in there, she's just waiting for her moment 👑

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💖 DESCRIPTION 💖

so when the page becomes writable, we've got to make sure we actually have blocks allocated on disk to back that page. periodt. no blocks on disk = no vibe, and we do not do that here 💀

(don't skip this step, it's giving "homework you can't skip" 🙈)

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🔥 SEE ALSO 🔥

the kernel file is ./fs/gfs2/file.c, and honestly the whole friend group shows up here:

• gfs2_llseek(9)
• gfs2_readdir(9)
• do_gfs2_set_flags(9)
• gfs2_size_hint(9)
• gfs2_allocate_folio_backing(9)
• gfs2_mmap(9)
• gfs2_open_common(9)
• gfs2_open(9)
• gfs2_release(9)
• gfs2_fsync(9)
• gfs2_file_write_iter(9)
• calc_max_reserv(9)
• gfs2_lock(9)
• gfs2_flock(9)

like, the whole squad, iconic ⭐🌈

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aaand that's the page!! mwah 💋 it comes to you from ./fs/gfs2, dated October 2026, and yes she's still out here living her best life as gfs2_page_mkwrite(9) 👑💜