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Commit 1449de51 authored by Linux Build Service Account's avatar Linux Build Service Account Committed by Gerrit - the friendly Code Review server
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Merge "mm: vmpressure: fix sending wrong events on underflow"

parents 3e089813 9dd531d8

mm/vmpressure.c

+9 −1
Original line number Diff line number Diff line
@@ -149,8 +149,15 @@ static unsigned long vmpressure_calc_pressure(unsigned long scanned, 
						    unsigned long reclaimed)

{

	unsigned long scale = scanned + reclaimed;

	unsigned long pressure;

	unsigned long pressure = 0;



	/*

	 * reclaimed can be greater than scanned in cases

	 * like THP, where the scanned is 1 and reclaimed

	 * could be 512

	 */

	if (reclaimed >= scanned)

		goto out;

	/*

	 * We calculate the ratio (in percents) of how many pages were

	 * scanned vs. reclaimed in a given time frame (window). Note that
@@ -161,6 +168,7 @@ static unsigned long vmpressure_calc_pressure(unsigned long scanned, 
	pressure = scale - (reclaimed * scale / scanned);

	pressure = pressure * 100 / scale;



out:

	pr_debug("%s: %3lu  (s: %lu  r: %lu)\n", __func__, pressure,

		 scanned, reclaimed);