xas_split_alloc(9)

✨ xas_split_alloc(9) ✨

okay so this is a page straight out of the Kernel API Manual, bestie — it's xas_split_alloc(9) and honestly it's giving "backstage crew for the main character function" energy 💅

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🌸 NAME 🌸

xas_split_alloc — allocate memory for splitting an entry, no cap 🫶

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🎀 SYNOPSIS 🎀

void xas_split_alloc (struct xa_state *xas , void *entry , unsigned int
       order , gfp_t gfp );

like literally that's the whole signature, copy it exactly please, it's void so it doesn't hand anything back to you 💖

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✨ ARGUMENTS ✨

• xas — the XArray operation state. this is your little main-character struct that knows what's going on 🔥
• entry — the new entry that's gonna be stored in the array. the newbie arriving at the party 🌈
• order — the current entry order. numbers, iconic, must be respected ⭐
• gfp — the memory allocation flags. aka "how down are we to sleep for this" 🦋

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💜 DESCRIPTION 💜

okay so listen: this function should be called before you call xas_split. not after. before. the way that timing matters here is so real 😭

if necessary, it will allocate new nodes — and fill them with entry — to prepare for the upcoming split. specifically, the upcoming split of an entry of order size into entries of the order stored in the xas. so it's like, pre-gaming for the split. setting up the venue before the guests arrive 🎀

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🧚 CONTEXT 🧚

may sleep if gfp flags permit. so like, it can nap, but only if the flags say it's allowed — permission is everything bestie 💅

ngl, if the gfp flags don't permit sleeping, don't expect a nap. context fully matters here 👑

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🦋 SEE ALSO 🦋

bestie. there is a list. a whole list. and I'm not skipping a single one because every single one of these is part of the family 🫶 this all lives in the kernel file ./lib/xarray.c:

• xas_load(9)
• xas_nomem(9)
• xas_free_nodes(9)
• xas_create_range(9)
• xas_store(9)
• xas_get_mark(9)
• xas_set_mark(9)
• xas_clear_mark(9)
• xas_init_marks(9)
• xas_split(9)
• xas_try_split_min_order(9)
• xas_try_split(9)
• xas_pause(9)
• xas_find(9)
• xas_find_marked(9)
• xas_find_conflict(9)
• xa_load(9)
• __xa_erase(9)
• xa_erase(9)
• __xa_store(9)
• xa_store(9)
• __xa_cmpxchg(9)
• __xa_insert(9)
• xa_store_range(9)
• xas_get_order(9)
• xa_get_order(9)
• __xa_alloc(9)
• __xa_alloc_cyclic(9)
• __xa_set_mark(9)
• __xa_clear_mark(9)
• xa_get_mark(9)
• xa_set_mark(9)
• xa_clear_mark(9)
• xa_find(9)
• xa_find_after(9)
• xa_extract(9)
• xa_delete_node(9)
• xa_destroy(9)

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and that's the whole page, periodt 💖 this one comes from the source at ./lib, dated October 2026, and it lives in the Kernel API Manual — see you in the group chat, mwah 🎀✨💜