[Ocfs2-devel] Ocfs2-devel Digest, Vol 138, Issue 31 review

[Joseph Qi]

On 2015/10/14 15:49, Zhangguanghui wrote:
> OCFS2 is often used in high-availaibility systems, This patch enhances robustness for the filesystem.
> but storage network is unstable，it still triggers a panic， such as ocfs2_start_trans -> __ocfs2_abort ->panic.
> The 's_mount_opt' should depend on the mount option set, If errors=continue is set, 
> mark as a EIO error, change OCFS2_MOUNT_ERRORS_PANIC to OCFS2_MOUNT_ERRORS_CONT in __ocfs2_abort;
> it's better than forcing a panic without decreasing availability,errors=continue seems be well to me.
> 
> Finally, any feedback about this process (positive or negative) would be greatly appreciated. 
> 
>    Aug 11 11:32:25 cvknode73 kernel: [678904.787906] (pool,23256,12):ocfs2_start_trans:367 ERROR: status = -30
> 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825046] CPU: 12 PID: 23256 Comm: pool Tainted: GF W IO 3.13.6 #1 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825050] Hardware name: HP ProLiant BL460c G7, BIOS I27 12/03/2012 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825054] ffffffffffffffe2 ffff88108c945a88 ffffffff81750690 ffff88180bacfff0 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825064] ffff88174196d000 ffff88108c945ad8 ffffffffa052f667 ffffffffffffffe2 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825072] 0000000000001000 ffff88108c945b58 ffff88175e870000 ffff8811ada4f000 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825087] Call Trace: 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825103] [<ffffffff81750690>] dump_stack+0x46/0x58 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825154] [<ffffffffa052f667>] ocfs2_start_trans+0x1d7/0x200 [ocfs2] 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825183] [<ffffffffa0505b60>] ocfs2_write_begin_nolock+0xda0/0x1c70 [ocfs2] 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825216] [<ffffffffa052b7cb>] ? ocfs2_read_inode_block_full+0x3b/0x60 [ocfs2] 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825248] [<ffffffffa051a82f>] ? ocfs2_inode_lock_full_nested+0x52f/0xc60 [ocfs2] 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825277] [<ffffffffa0516060>] ? ocfs2_should_refresh_lock_res+0x80/0x190 [ocfs2] 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825304] [<ffffffffa0506b36>] ocfs2_write_begin+0x106/0x230 [ocfs2] 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825330] [<ffffffffa05180ab>] ? __ocfs2_cluster_unlock.isra.27+0x9b/0xe0 [ocfs2] 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825342] [<ffffffff8115342b>] generic_file_buffered_write+0xfb/0x280 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825370] [<ffffffffa051a1c5>] ? ocfs2_rw_lock+0x75/0x1b0 [ocfs2] 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825398] [<ffffffffa0527f3f>] ocfs2_file_aio_write+0x79f/0x830 [ocfs2] 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825407] [<ffffffff811c14ba>] do_sync_write+0x5a/0x90 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825413] [<ffffffff811c1fc5>] vfs_write+0xc5/0x1f0 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825418] [<ffffffff811c24c2>] SyS_write+0x52/0xa0 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825426] [<ffffffff8176106d>] system_call_fastpath+0x1a/0x1f 
>     Aug 11 11:32:25 cvknode73 kernel: [678904.825431] OCFS2: abort (device sdu): ocfs2_start_trans: Detected aborted journal 
> 
"status = -30" means it has encountered EROFS when start transaction.
And system panic is because you mount with option "errors=panic",
while default is "errors=remount-ro" rather than panic.
Change it to "errors=continue" will proceed even if filesystem
encounters errors (default will set it to readonly).

Thanks,
Joseph

> 
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> zhangguanghui