bch_bio_alloc_pages(9)

💖 bch_bio_alloc_pages(9) 💖

okay so bestie, welcome to the Kernel API Manual — yes that's the manual name, we're being fancy today 👑 — and today's main character is bch_bio_alloc_pages, a little function that hands out pages like they're concert tickets 🎟️

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✨ NAME ✨

bch_bio_alloc_pages — allocates a single page for each bvec in a bio. literally one page per bvec, no more no less, it's giving fairness 💅

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🌸 SYNOPSIS 🌸

int bch_bio_alloc_pages (struct bio *bio , gfp_t gfp_mask );

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🎀 ARGUMENTS 🎀

• bio — the bio you want pages for 🦋 this is the one getting pampered
• gfp_mask — the flags for allocation, aka the vibe instructions for the allocator ✨

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💜 DESCRIPTION 💜

So it allocates pages up to bio->bi_vcnt. that's the ceiling, bestie, it stops there, iconic behavior 🫶

Returns 0 on success 😌 and -ENOMEM on failure 😭. and hear me out — on failure, any allocated pages are freed. no leaks, no mess, she cleans up after herself, we love a responsible queen 👑

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/md/bcache/util.c
• bch_hprint(9)
• bch_next_delay(9)

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ngl if you're poking around in bcache utility code, those two are your next stops, iykyk 🔥

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⭐ and that's the whole page fr fr — brought to you by ./drivers/md/bcache, dated October 2026, and living its best life as bch_bio_alloc_pages(9). mwah, go read some more kernel docs, ily 💖🎀