Messages in this thread |  | | Date | Wed, 20 Sep 2000 22:23:36 +0200 | From | Roger Larsson <> | Subject | 2.4.0-test9-pre4: __alloc_pages(...) try_again: |
| |
Hi,
Trying to find out why test9-pre4 freezes with mmap002 I added a counter for try_again loops.
... __alloc_pages(...)
int direct_reclaim = 0; unsigned int gfp_mask = zonelist->gfp_mask; struct page * page = NULL; + int try_again_loops = 0;
- - -
+ printk("VM: sync kswapd (direct_reclaim: %d) try_again # %d\n", + direct_reclaim, ++try_again_loops); wakeup_kswapd(1); goto try_again;
Result was surprising: direct_reclaim was 1. try_again_loops did never stop increasing (note: it is not static, and should restart from zero after each success)
Why does this happen? a) kswapd did not succeed in freeing a suitable page? b) __alloc_pages did not succeed in grabbing the page?
/RogerL
-- Home page: http://www.norran.net/nra02596/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
|  |