SLAB_RECLAIM_ACCOUNT(9)

🌸 SLAB_RECLAIM_ACCOUNT(9) 🌸

okay so bestie, welcome to the Kernel API Manual — this one's a little flag from the slab allocator side of town and it's honestly kind of a big deal ✨

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💖 NAME 💖

SLAB_RECLAIM_ACCOUNT — the flag that says these objects are reclaimable, and yes that's the whole mood 🫶

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🎀 SYNOPSIS 🎀

SLAB_RECLAIM_ACCOUNT

like, that's it. that's the flag. no args, no drama 💅

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🦋 DESCRIPTION 🦋

okay so here's the tea 🍓 — you use this flag for caches that have an associated shrinker. that's the whole point, that's the vibe.

because of that, slab pages get allocated with __GFP_RECLAIMABLE 🔥 which does two things, and both of them are lowkey important:

• it affects grouping pages by mobility (yes, the pages get sorted by how movable they are, it's giving page-grouping main character energy)
• and those pages get accounted in the SReclaimable counter in /proc/meminfo 📊 — so when you peek at your meminfo, that's where it shows up, iykyk

no cap, that's the entire flag. small flag, big accounting consequences ✨

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⭐ SEE ALSO ⭐

the whole squad, fr fr — and hey, peep the kernel file too:

• Kernel file ./include/linux/slab.h
• SLAB_HWCACHE_ALIGN(9)
• SLAB_TYPESAFE_BY_RCU(9)
• SLAB_ACCOUNT(9)
• struct kmem_cache_args(9)
• kmem_cache_create_usercopy(9)
• kmem_cache_create(9)
• krealloc_node_align(9)
• kmem_cache_alloc(9)
• kmem_cache_charge(9)
• kmalloc(9)
• kmalloc_nolock(9)
• __alloc_objs(9)
• __alloc_flex(9)
• kmalloc_obj(9)
• kmalloc_objs(9)
• kmalloc_flex(9)
• kmalloc_array(9)
• krealloc_array(9)
• kcalloc(9)
• kzalloc(9)
• kvmalloc_node(9)
• kvrealloc_node_align(9)
• kmalloc_size_roundup(9)

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💀 reminder bestie: if your cache has a shrinker, this flag is the flag. if it doesn't, this ain't it — go read SLAB_ACCOUNT(9) instead, k? 🙈

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and that's a wrap, mwah 💋 — this lil page came from ./include/linux, dated October 2026, and it lives in the Kernel API Manual section 9. go be reclaimable, icon 👑🌈