page_counter_set_low(9)

💅 page_counter_set_low — the Kernel API Manual girlies know

okay so bestie, welcome to the Kernel API Manual entry for page_counter_set_low(9) and honestly? it's giving "small function, big responsibility" ✨ lowkey a main character moment for memory protection fr fr.

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🌸 NAME 🌸

page_counter_set_low — set the amount of protected memory 🛡️💖

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✨ SYNOPSIS ✨

void page_counter_set_low (struct page_counter *counter , unsigned long
nr_pages );

that's it, that's the whole vibe. returns nothing (it's void, she doesn't owe you a status code 💅).

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🎀 ARGUMENTS 🎀

• counter — the counter. yes. that's the description. the counter itself. the one and only 🫶
• nr_pages — the value to set 👑 this is the number you're plugging in, the amount of protected memory you're declaring.

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💜 DESCRIPTION 💜

so here's the tea: this sets the amount of protected memory on a page_counter — a low watermark situation, iykyk.

⚠️ the caller must serialize invocations on the same counter. no cap, this is the important part 🔥 if you're calling this on the same counter from multiple places, you have to make sure those calls don't overlap. the function does not do that for you, bestie. that's on you. do not come crying to me 😭

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🦋 SEE ALSO 🦋

peep the kernel file ./mm/page_counter.c for the full lore, plus these iconic siblings:

• page_counter_cancel(9)
• page_counter_charge(9)
• page_counter_try_charge(9)
• page_counter_uncharge(9)
• page_counter_set_max(9)
• page_counter_set_min(9)
• page_counter_memparse(9)
• page_counter_calculate_protection(9)

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🌈 sign-off 🌈

this whole lil masterpiece lives in ./mm, and it's dated October 2026 — so mark your calendars, she's from the future 🧚⭐ go forth and set your lows responsibly, bestie, and remember: serialize those invocations. periodt. 💖