On 05/11/2012 05:30 PM, Sasha Levin wrote: > On Fri, May 11, 2012 at 10:00 AM, Hugh Dickins <hughd@xxxxxxxxxx> wrote: >> Commit 93278814d359 "mm: fix division by 0 in percpu_pagelist_fraction()" >> mistakenly initialized percpu_pagelist_fraction to the sysctl's minimum 8, >> which leaves 1/8th of memory on percpu lists (on each cpu??); but most of >> us expect it to be left unset at 0 (and it's not then used as a divisor). > > I'm a bit confused about this, does it mean that once you set > percpu_pagelist_fraction to a value above the minimum, you can no > longer set it back to being 0? Unfortunately, Yes. :( It's rather awkward and need fix. -- Kind regards, Minchan Kim -- 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>