blkdev_issue_discard(9)

✨ blkdev_issue_discard(9) ✨

okay so this is blkdev_issue_discard from the Kernel API Manual — yes, that Kernel API Manual, the one and only 👑 — and bestie, it's literally the function that queues a discard. that's the whole vibe. let's get into it 🎀

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🌸 NAME 🌸

blkdev_issue_discard — queue a discard 💅

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🦋 SYNOPSIS 🦋

int blkdev_issue_discard (struct block_device *bdev , sector_t sector ,
sector_t nr_sects , gfp_t gfp_mask );

like, that's the whole signature. four args. she's not complicated, she's just precise ✨

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🎀 ARGUMENTS 🎀

• bdev — the blockdev you're issuing the discard for. this is the main character right here 💖
• sector — the start sector. where the whole thing kicks off 📍
• nr_sects — how many sectors you're discarding. the number. the amount. the count 🍓
• gfp_mask — memory allocation flags — and fr fr, these are specifically for bio_alloc. don't forget that part, iykyk 🙈

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🔥 DESCRIPTION 🔥

Issue a discard request for the sectors in question. that's it. that's the function. she takes your sectors, she queues the discard, she moves on with her life 💅✨

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🌈 SEE ALSO 🌈

• the Kernel file ./block/blk-lib.c
• __blkdev_issue_zeroout(9)
• blkdev_issue_zeroout(9)

like, go read those too, they're the friend group 🫶

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and that's a wrap bestie!! this page lives in ./block, dated October 2026, and it's filed as blkdev_issue_discard(9) — no cap, go queue some discards responsibly 💜🌸⭐