> From: Andrea Arcangeli <aarcange@xxxxxxxxxx> > > This takes advantage of memory compaction to properly generate pages of order > > 0 if regular page reclaim fails and priority level becomes more severe and we > don't reach the proper watermarks. > > Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx> First, I don't think this patch is related to GFP_ATOMIC. So, I think the patch title is a bit misleading. Second, this patch has two changes. 1) remove PAGE_ALLOC_COSTLY_ORDER threshold 2) implement background compaction. please separate them. Third, This patch makes a lot of PFN order page scan and churn LRU aggressively. I'm not sure this aggressive lru shuffling is safe and works effective. I hope you provide some demonstration and/or show benchmark result. Thanks. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>