1. 10 Jan, 2020 1 commit
    • Miles Chen's avatar
      Input: evdev - convert kzalloc()/vzalloc() to kvzalloc() · 7f439bc2
      Miles Chen authored
      We observed a large(order-3) allocation in evdev_open() and it may
      cause an OOM kernel panic in kzalloc(), before we getting to the
      vzalloc() fallback.
      
      Fix it by converting kzalloc()/vzalloc() to kvzalloc() to avoid the
      OOM killer logic as we have a vmalloc fallback.
      
      InputReader invoked oom-killer: gfp_mask=0x240c2c0
      (GFP_KERNEL|__GFP_NOWARN|__GFP_COMP|__GFP_ZERO), nodemask=0, order=3,
      oom_score_adj=-900
      ...
      (dump_backtrace) from (show_stack+0x18/0x1c)
      (show_stack) from (dump_stack+0x94/0xa8)
      (dump_stack) from (dump_header+0x7c/0xe4)
      (dump_header) from (out_of_memory+0x334/0x348)
      (out_of_memory) from (__alloc_pages_nodemask+0xe9c/0xeb8)
      (__alloc_pages_nodemask) from (kmalloc_order_trace+0x34/0x128)
      (kmalloc_order_trace) from (__kmalloc+0x258/0x36c)
      (__kmalloc) from (evdev_open+0x5c/0x17c)
      (evdev_open) from (chrdev_open+0x100/0x204)
      (chrdev_open) from (do_dentry_open+0x21c/0x354)
      (do_dentry_open) from (vfs_open+0x58/0x84)
      (vfs_open) from (path_openat+0x640/0xc98)
      (path_openat) from (do_filp_open+0x78/0x11c)
      (do_filp_open) from (do_sys_open+0x130/0x244)
      (do_sys_open) from (SyS_openat+0x14/0x18)
      (SyS_openat) from (__sys_trace_return+0x0/0x10)
      ...
      Normal: 12488*4kB (UMEH) 6984*8kB (UMEH) 2101*16kB (UMEH) 0*32kB
      0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 139440kB
      HighMem: 206*4kB (H) 131*8kB (H) 42*16kB (H) 2*32kB (H) 0*64kB
      0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2608kB
      ...
      Kernel panic - not syncing: Out of memory and no killable processes...
      Signed-off-by: default avatarMiles Chen <miles.chen@mediatek.com>
      Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
      7f439bc2
  2. 14 Dec, 2019 1 commit
  3. 13 Dec, 2019 3 commits
  4. 06 Dec, 2019 1 commit
  5. 05 Dec, 2019 6 commits
  6. 25 Nov, 2019 2 commits
  7. 23 Nov, 2019 2 commits
  8. 22 Nov, 2019 2 commits
  9. 15 Nov, 2019 4 commits
  10. 13 Nov, 2019 2 commits
  11. 12 Nov, 2019 14 commits
  12. 05 Nov, 2019 2 commits