>> While allocateing pages using buddy allocator, the compound page >> is probably split up to free pages. Under the circumstance, the >> compound page should be destroied by function destroy_compound_page(). >> However, there has duplicate check to judge if the page is compound >> one. >> >> The patch removes the duplicate check since the function compound_order() >> will returns 0 while the page hasn't PG_head set in function destroy_compound_page(). >> That's to say, the function destroy_compound_page() needn't check >> PG_head any more through function PageHead(). >> >> Signed-off-by: Gavin Shan <shangw@xxxxxxxxxxxxxxxxxx> > >Looks good! > >But the slab in the subject suggests it would not affect other parts >of mm, while it actually affects THP, too. Should probably be >removed? > >Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx> > Thanks for looking into this, Johannes :-) I'm not sure I should change the subject to "mm: xxx" and resend it since it has been put into linux-mm next tree as the maillist mm-commits told me. By the way, I even don't know how linux-mm next got sychronized with linux mainline yet :-) Thanks, Gavin -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>