Re: [PATCH v2] f2fs: Fix deadlock in shutdown ioctl

2018-05-18 Thread Sahitya Tummala
On Thu, May 17, 2018 at 06:08:26PM -0700, Jaegeuk Kim wrote: > > if (in == F2FS_GOING_DOWN_FULLSYNC) { > sb = freeze_bdev(); > if (IS_ERR(sb)) > return PTR_ERR(sb); > if (unlikely(!sb)) > return -EINVAL; > } > > ret = mnt_want_write_file(); It will b

Re: [PATCH v2] f2fs: Fix deadlock in shutdown ioctl

2018-05-17 Thread Jaegeuk Kim
On 05/17, Chao Yu wrote: > On 2018/5/17 16:03, Sahitya Tummala wrote: > > f2fs_ioc_shutdown() ioctl gets stuck in the below path > > when issued with F2FS_GOING_DOWN_FULLSYNC option. > > > > __switch_to+0x90/0xc4 > > percpu_down_write+0x8c/0xc0 > > freeze_super+0xec/0x1e4 > > freeze_bdev+0xc4/0xcc

Re: [PATCH v2] f2fs: Fix deadlock in shutdown ioctl

2018-05-17 Thread Chao Yu
On 2018/5/17 16:03, Sahitya Tummala wrote: > f2fs_ioc_shutdown() ioctl gets stuck in the below path > when issued with F2FS_GOING_DOWN_FULLSYNC option. > > __switch_to+0x90/0xc4 > percpu_down_write+0x8c/0xc0 > freeze_super+0xec/0x1e4 > freeze_bdev+0xc4/0xcc > f2fs_ioctl+0xc0c/0x1ce0 > f2fs_compat_

[PATCH v2] f2fs: Fix deadlock in shutdown ioctl

2018-05-17 Thread Sahitya Tummala
f2fs_ioc_shutdown() ioctl gets stuck in the below path when issued with F2FS_GOING_DOWN_FULLSYNC option. __switch_to+0x90/0xc4 percpu_down_write+0x8c/0xc0 freeze_super+0xec/0x1e4 freeze_bdev+0xc4/0xcc f2fs_ioctl+0xc0c/0x1ce0 f2fs_compat_ioctl+0x98/0x1f0 Signed-off-by: Sahitya Tummala --- v2: rem