On Mon, May 23, 2016 at 08:14:08PM +0300, Ebru Akagunduz wrote: > This patch series removes duplication of included header > and fixes locking inconsistency in khugepaged swapin > > Ebru Akagunduz (3): > mm, thp: remove duplication of included header > mm, thp: fix possible circular locking dependency caused by > sum_vm_event() > mm, thp: make swapin readahead under down_read of mmap_sem > > mm/huge_memory.c | 39 ++++++++++++++++++++++++++++++--------- > 1 file changed, 30 insertions(+), 9 deletions(-) > Hi Andrew, I prepared this patch series to solve rest of problems of khugepaged swapin. I have seen the discussion: http://marc.info/?l=linux-mm&m=146373278424897&w=2 In my opinion, checking whether kswapd is wake up could be good. It's up to you. I can take an action according to community's decision. Here is the last status of the discussion: " Optimistic swapin collapsing 1. it could be too optimisitic to lose the gain due to evicting workingset 2. let's detect memory pressure 3. current allocstall magic is not a good idea. 4. let's change the design from optimistic to conservative 5. how we can be conservative 6. two things - detect hot pages and threshold of swap pte 7. threhsold of swap pte is already done so remained thing is detect hot page 8. how to detect hot page - let's use young bit 9. Now, we are conservatie so we will swap in when it's worth 10. let's remove allocstall magic I think it's not off-topic. Anyway, it's just my thought and don't have any real workload and objection. Feel free to ignore. " Thanks. -- 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>