PMEM2_CONFIG_SET_VM_RESERVATION(3)

💖 pmem2_config_set_vm_reservation() 💖

okay bestie, welcome to the PMDK Programmer's Manual — section 3, the lil corner where libpmem2 lives. this one's short and sweet, so let's go 🫶

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✨ NAME ✨

pmem2_config_set_vm_reservation() — sets the pmem2_vm_reservation structure basing on the values in the pmem2_config structure 💅

like, it literally just takes what's in your config and copies the vibe over to the reservation struct. no cap.

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🌸 SYNOPSIS 🌸

#include <libpmem2.h>

struct pmem2_config;
struct pmem2_vm_reservation;
int pmem2_config_set_vm_reservation(struct pmem2_config *config,
        struct pmem2_vm_reservation *rsv, size_t rsv_offset);

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🦋 DESCRIPTION 🦋

so the pmem2_config_set_vm_reservation() function sets the virtual memory reservation and an offset to be used during a mapping. it's giving "here's where you're mapping, and here's exactly where in that space you start" ✨

rsv should be already initialized. please see pmem2_vm_reservation_new(3) for details — don't come at me with an uninitialized reservation, i'm begging 🙈

rsv_offset marks the offset in the reservation for the mapping. like, the lil bookmark saying "start here" 📌

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💀 RETURN VALUE 💀

pmem2_config_set_vm_reservation() function always returns 0.

periodt. no error codes, no drama, no surprises. it just works and hands you a 0. iconic behavior honestly 👑

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🌈 SEE ALSO 🌈

• pmem2_vm_reservation_new(3)
• libpmem2(7)
• https://pmem.io

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💜 reminder bestie: rsv has to be initialized first, okay? that's the whole plot twist of this page.

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that's the whole thing, we ate and left no crumbs 🍓 this was PMDK, dated 2025-07-24 — mwah, love u, go map something 💖✨🎀