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kernel: image reclaim pauses

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get a bit more verbose about process image exhaustion and make
imagreclaim() try to get at least one image on the freelist.

use rsrcwait() to notify the state, and call freebroken() in
case imagereclaim() couldnt free any images.
This commit is contained in:
cinap_lenrek 2013-05-27 01:04:53 +02:00
parent 3e567afed5
commit 24b908be8a
1 changed files with 5 additions and 2 deletions
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7
sys/src/9/port/segment.c
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@ -264,7 +264,10 @@ attachimage(int type, Chan *c, ulong base, ulong len)
while(!(i = imagealloc.free)) {
unlock(&imagealloc);
imagereclaim();
sched();
if(!imagealloc.free){
freebroken(); /* can use the memory */
resrcwait("no image after reclaim");
}
lock(&imagealloc);
}
@ -328,7 +331,7 @@ imagereclaim(void)
* end of the list (see putpage) so start there and work
* backward.
*/
for(p = palloc.tail; p && p->image && n<1000; p = p->prev) {
for(p = palloc.tail; p && p->image && (n<1000 || !imagealloc.free); p = p->prev) {
if(p->ref == 0 && canlock(p)) {
if(p->ref == 0) {
n++;