krealloc_array(9)

💖 krealloc_array 💖

okay so bestie, this is the Kernel API Manual page for krealloc_array, and she is literally here to reallocate memory for an array. iconic behavior. ✨

🎀 NAME 🎀

• krealloc_array — reallocate memory for an array 💅

✨ SYNOPSIS ✨

void * krealloc_array (void *p , size_t new_n , size_t new_size , gfp_t
       flags );

🦋 ARGUMENTS 🦋

• p — pointer to the memory chunk to reallocate 🫶
• new_n — the new number of elements to alloc 🧚
• new_size — the new size of a single member of the array 🌸
• flags — the type of memory to allocate (see kmalloc) 🔥

🌈 DESCRIPTION 🌈

okay so here's the vibe check on __GFP_ZERO — and ngl, this part matters. 👑

⚠️ bestie, listen: if __GFP_ZERO logic is requested, callers must ensure that, starting with the initial memory allocation, every subsequent call to this API for the same memory allocation is flagged with __GFP_ZERO. Otherwise, it is possible that __GFP_ZERO is not fully honored by this API. 💀

See krealloc_noprof for further details. 🫡

In any case, the contents of the object pointed to are preserved up to the lesser of the new and old sizes. no cap. 💖

🌟 SEE ALSO 🌟

Kernel file ./include/linux/slab.h — say hi to the whole squad:

• SLAB_HWCACHE_ALIGN(9)
• SLAB_TYPESAFE_BY_RCU(9)
• SLAB_ACCOUNT(9)
• SLAB_RECLAIM_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)
• kcalloc(9)
• kzalloc(9)
• kvmalloc_node(9)
• kvrealloc_node_align(9)
• kmalloc_size_roundup(9)

and that's the tea 🍓 — this page comes from ./include/linux, dated October 2026, and it's still your girl krealloc_array(9). mwah 💋✨