nfs_start_io_direct_nowait(9)

💅 nfs_start_io_direct_nowait(9) 💅

okay so bestie, welcome to the Kernel API Manual — this one's a lil function from the NFS corner of the kernel and honestly it's giving "polite but firm". let's get into it 🫶

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✨ NAME ✨

nfs_start_io_direct_nowait — the non-blocking variant of nfs_start_io_direct(). that's it, that's the vibe. no waiting, no drama, no cap 💅

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🌸 SYNOPSIS 🌸

int nfs_start_io_direct_nowait (struct inode *inode );

like, look at her. one argument, returns an int, zero patience 🔥

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🎀 ARGUMENTS 🎀

• inode — the file inode. yeah that's the whole description, she's mysterious like that 🙈 it's the inode of the file you're doing the direct I/O thing on, iykyk.

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🦋 DESCRIPTION 🦋

so here's the tea ☕ — nfs_start_io_direct_nowait tries to declare that a direct I/O operation is about to start, but with no blocking. like, if it can't happen right this second, she's not gonna sit around waiting like some main character with nothing to do, she's just gonna bounce.

it also makes sure that all buffered I/O is blocked while this is going on. important! 💯

and if that couldn't be done without blocking? bestie, you get -EAGAIN back. that's the whole signal — go away, try again later, respectfully 😭

ngl the "nowait" in the name is not a suggestion, it's a whole personality ✨

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👑 SEE ALSO 👑

go read these, they're iconic in their own right:

• Kernel file ./fs/nfs/io.c
• nfs_start_io_read(9)
• nfs_end_io_read(9)
• nfs_start_io_write(9)
• nfs_end_io_write(9)
• nfs_start_io_direct(9)
• nfs_end_io_direct(9)

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aaaand that's the page, bestie 🧚💖 it lives over in ./fs/nfs, dated October 2026, and it's filed under nfs_start_io_direct_nowait(9) in the Kernel API Manual. slay, go block some buffered I/O responsibly 🌈⭐