On 2015/4/29 18:58, Rasmus Villemoes wrote: > On Wed, Apr 29 2015, Zhang Zhen <zhenzhang.zhang@xxxxxxxxxx> wrote: > >> Hi, >> >> Our x86 system has crashed because oom. >> We found task_struct slabs ate much memory. > > I can't explain what you've seen, but a simple way to reduce the > memory footprint of struct task_struct is > > CONFIG_LATENCYTOP=n > > That will reduce sizeof(struct task_struct) by ~3840 bytes (60%, give or > take). > Thank you for your sugesstion. But my purpose is not to reduce sizeof(struct task_struct). I want to know why the task_struct slab can't be released back to buddy when the page's inuse is 0. Best regards! > Rasmus > >> CACHE NAME OBJSIZE ALLOCATED TOTAL SLABS SSIZE //**Slabs is much larger than alloctated object counts** >> ffff88081e007500 task_struct 6528 4639 229775 45955 32k > > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>