Date: Thu, 23 Nov 2000 16:58:28 +0100 (CET) From: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz> To: freebsd-hackers@freebsd.org Subject: page coloring Message-ID: <Pine.LNX.3.96.1001123162401.737A-100000@artax.karlin.mff.cuni.cz>
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Hi. Isn't the page coloring algoritm in _vm_page_list_find totally bogus? It skips queue pq[index & PQ_L2_MASK]. If it doesn't find page with desired color, it allocates page with nearest color - as a result there are two pages with same color mapped at two adjacent virtual adresses - this is the exact opposite of what page coloring should do! It should be changed to something like: for (i = PQ_L2_SIZE * PQ_PRIME1; i > 0; i -= PQ_PRIME1) if ((m = TAILQ_FIRST(&pq[(index + i) & PQ_L2_MASK].pl)) != NULL) break; Mikulas To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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