Re: [Qestion] Hit a WARN_ON_ONCE in try_to_unmap_one when runing syzkaller

2019-03-14 Thread zhong jiang
On 2019/3/14 14:27, Naoya Horiguchi wrote: > Hi, > > On Wed, Mar 13, 2019 at 12:03:20AM +0800, zhong jiang wrote: > ... >> Minchan has changed the conditon check from BUG_ON to WARN_ON_ONCE in >> try_to_unmap_one. >> However, It is still an abnormal condition when PageSwapBacked is not equal >

Re: [Qestion] Hit a WARN_ON_ONCE in try_to_unmap_one when runing syzkaller

2019-03-13 Thread Naoya Horiguchi
Hi, On Wed, Mar 13, 2019 at 12:03:20AM +0800, zhong jiang wrote: ... > > Minchan has changed the conditon check from BUG_ON to WARN_ON_ONCE in > try_to_unmap_one. > However, It is still an abnormal condition when PageSwapBacked is not equal > to PageSwapCache. > > But Is there any case it w

[Qestion] Hit a WARN_ON_ONCE in try_to_unmap_one when runing syzkaller

2019-03-12 Thread zhong jiang
Hi, I hit the following issue when running syzkaller in arm64. It is hardly to reproduce the issue by the attached log. [ 206.633857] Injecting memory failure for pfn 0x38c7e0 at process virtual address 0x201e [ 206.766875] WARNING: CPU: 1 PID: 738 at mm/rmap.c:1571 try_to_unmap_one+0x