git: 9front

Download patch

ref: 4d017ccb5c5e35ed515a5f5ff781f75f34b3ec12
parent: d84a6c7a4d9393d2a88d46490c16392a45a1aeaf
author: cinap_lenrek <cinap_lenrek@gmx.de>
date: Sun May 26 23:26:53 EDT 2013

kernel: make imagereclaim() skip notext pages (prevent it from blowing the mount cache)

imagereclaim would happily uncache pages from the mountcache (port/cache.c)
without ever getting a Image* released from it. simple fix, just check for
p->image->notext but make sure todo it under the page lock :)

--- a/sys/src/9/port/segment.c

+++ b/sys/src/9/port/segment.c

@@ -333,7 +333,7 @@

 	 */

 	for(p = palloc.tail; p && p->image && (n<1000 || !imagealloc.free); p = p->prev) {

 		if(p->ref == 0 && canlock(p)) {

-			if(p->ref == 0) {

+			if(p->ref == 0 && p->image && !p->image->notext) {

 				n++;

 				uncachepage(p);

 			}

-- 

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