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kernel: dont use smalloc() to allocate pte array in ibrk()

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when we'r out of kernel memory, it is probably better to
let that alloc fail instead of hanging while holding the
segment qlock.
This commit is contained in:
cinap_lenrek 2015-06-13 17:50:26 +02:00
parent 27fb90eb6e
commit d6eb7cc71c
1 changed files with 5 additions and 1 deletions
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6
sys/src/9/port/segment.c
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@ -437,7 +437,11 @@ ibrk(uintptr addr, int seg)
}
mapsize = ROUND(newsize, PTEPERTAB)/PTEPERTAB;
if(mapsize > s->mapsize){
map = smalloc(mapsize*sizeof(Pte*));
map = malloc(mapsize*sizeof(Pte*));
if(map == nil){
qunlock(s);
error(Enomem);
}
memmove(map, s->map, s->mapsize*sizeof(Pte*));
if(s->map != s->ssegmap)
free(s->map);