From: sl@9front.org
To: 9front@9front.org
Subject: Re: [9front] no image after reclaim
Date: Mon, 24 Feb 2014 16:47:45 -0500 [thread overview]
Message-ID: <db23e96248c81cb359005b33c66ba9a9@pi.att> (raw)
In-Reply-To: <c6582a0937bcbd26117209ba5bec2023@felloff.net>
Revision: 8d1b21036a59
Branch: default
Author: cinap_lenrek@felloff.net
Date: Mon Feb 24 21:42:22 2014 UTC
Log: kernel: keep cached pages continuous at the end of the page list
on imagereclaim()
imagereclaim() sabotaged itself by breaking the invariant
that cached pages are kept at the end of the page list.
once we made a hole of uncached pages, we would stop
reclaiming cached pages before it as the loop breaks
once it hits a uncached page. (we iterate backwards from
the tail to the head of the pagelist until pages have been
reclaimed or we hit a uncached page).
the solution is to move pages to the head of the pagelist
after removing them from the image cache.
http://code.google.com/p/plan9front/source/detail?r=8d1b21036a59
Modified:
/sys/src/9/port/page.c
/sys/src/9/port/portfns.h
/sys/src/9/port/segment.c
prev parent reply other threads:[~2014-02-24 21:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-24 5:58 sl
2014-02-24 7:18 ` [9front] " cinap_lenrek
2014-02-24 21:47 ` sl [this message]
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