Re: [PATCH] mm, page_alloc: Do not wake kswapd with zone lock held

2019-01-04 Thread Mel Gorman
On Fri, Jan 04, 2019 at 09:18:38AM +0100, Vlastimil Babka wrote: > On 1/3/19 11:57 PM, Mel Gorman wrote: > > While zone->flag could have continued to be unused, there is potential > > for moving some existing fields into the flags field instead. Particularly > > read-mostly ones like

Re: [PATCH] mm, page_alloc: Do not wake kswapd with zone lock held

2019-01-04 Thread Vlastimil Babka
On 1/3/19 11:57 PM, Mel Gorman wrote: > syzbot reported the following regression in the latest merge window > and it was confirmed by Qian Cai that a similar bug was visible from a > different context. > > == > WARNING: possible circular locking

[PATCH] mm, page_alloc: Do not wake kswapd with zone lock held

2019-01-03 Thread Mel Gorman
syzbot reported the following regression in the latest merge window and it was confirmed by Qian Cai that a similar bug was visible from a different context. == WARNING: possible circular locking dependency detected 4.20.0+ #297 Not tainted