On Thu, Sep 07, 2023 at 12:02:02PM +0800, Peng Zhang wrote: > > > 在 2023/9/7 11:49, Matthew Wilcox 写道: > > On Thu, Sep 07, 2023 at 12:39:14PM +0900, 심재선 wrote: > > > Use GFP_KERNEL on mas_node_count instead of GFP_NOWAIT | __GFP_NOWARN > > > in order to allow memory reclaim. > There are many paths that call maple tree's mas_node_count(). Some paths > cannot reclaim memory. Right ... but we should be handling the ENOMEM inside the maple tree and allocating some nodes with GFP_KERNEL instead of failing fork(). > > What testing did you do of this patch? In particular, did you try it > > with lockdep enabled?
