[AMD Public Use] > -----Original Message----- > From: Michel Dänzer <[email protected]> > Sent: Monday, October 26, 2020 7:04 AM > To: Alex Xu (Hello71) <[email protected]>; Kazlauskas, Nicholas > <[email protected]>; Deucher, Alexander > <[email protected]>; Wentland, Harry > <[email protected]>; Li, Sun peng (Leo) <[email protected]>; > [email protected] > Cc: [email protected] > Subject: Re: amdgpu crashes on OOM > > On 2020-10-26 5:29 a.m., Alex Xu (Hello71) wrote: > > Hi, > > > > I frequently encounter OOM on my system, mostly due to my own fault. > > Recently, I noticed that not only does a swap storm happen and OOM > > killer gets invoked, but the graphics output freezes permanently. > > Checking the kernel messages, I see: > > > > kworker/u24:4: page allocation failure: order:5, > mode:0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), > nodemask=(null) > > CPU: 6 PID: 279469 Comm: kworker/u24:4 Tainted: G W > > 5.9.0-14732- > g20b1adb60cf6 #2 > > Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./B450 > > Pro4, BIOS P4.20 06/18/2020 > > Workqueue: events_unbound commit_work > > Call Trace: > > ? dump_stack+0x57/0x6a > > ? warn_alloc.cold+0x69/0xcd > > ? __alloc_pages_direct_compact+0xfb/0x116 > > ? __alloc_pages_slowpath.constprop.0+0x9c2/0xc14 > > ? __alloc_pages_nodemask+0x143/0x167 > > ? kmalloc_order+0x24/0x64 > > ? dc_create_state+0x1a/0x4d > > ? amdgpu_dm_atomic_commit_tail+0x1b19/0x227d > > Looks like dc_create_state should use kvzalloc instead of kzalloc > (dc_state_free already uses kvfree). > > order:5 means it's trying to allocate 32 physically contiguous pages, which > can > be hard to fulfill even with lower memory pressure. >
It was using kvzalloc, but was accidently dropped when that code was refactored. I just sent a patch to fix it. Alex > > -- > Earthling Michel Dänzer | > https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fredh > at.com%2F&data=04%7C01%7Calexander.deucher%40amd.com%7Cc60 > 56551dd4d423bdc0508d8799ed189%7C3dd8961fe4884e608e11a82d994e183d > %7C0%7C0%7C637393070333648663%7CUnknown%7CTWFpbGZsb3d8eyJWIj > oiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1 > 000&sdata=a7Lpu04KnpsFQpCO7y5WOLJSMPpA%2Be1s%2FufgYTDHs2k > %3D&reserved=0 > Libre software enthusiast | Mesa and X developer
