Re: [PATCH v2 1/5] mm: memmap defer init dosn't work as expected

2020-12-20 Thread Mike Rapoport
On Sun, Dec 20, 2020 at 04:27:50PM +0800, Baoquan He wrote: > VMware observed a performance regression during memmap init on their platform, > and bisected to commit 73a6e474cb376 ("mm: memmap_init: iterate over memblock > regions rather that check each PFN") causing it. > > Before the commit: >

[PATCH v2 1/5] mm: memmap defer init dosn't work as expected

2020-12-20 Thread Baoquan He
VMware observed a performance regression during memmap init on their platform, and bisected to commit 73a6e474cb376 ("mm: memmap_init: iterate over memblock regions rather that check each PFN") causing it. Before the commit: [0.033176] Normal zone: 1445888 pages used for memmap [0.033176]