lkml.org 
[lkml]   [2020]   [Mar]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] ubifs: Don't discard nodes in recovery when ecc err detected
Zhihao Cheng,

On Fri, Feb 21, 2020 at 2:57 PM Zhihao Cheng <chengzhihao1@huawei.com> wrote:
>
> The following process will lead TNC to find no corresponding inode node
> (Reproduce method see Link):

Please help me to understand what exactly is going on.

> 1. Garbage collection.
> 1) move valid inode nodes from leb A to leb B
> (The leb number of B has been written as GC type bud node in log)
> 2) unmap leb A, and corresponding peb is erased
> (GCed inode nodes exist only on leb B)

At this point all valid nodes are written to LEB B, right?

> 2. Poweroff. A node near the end of the LEB is corrupted before power
> on, which is uncorrectable error of ECC.

If writing nodes to B has finished, these pages should be stable.
How can a power-cut affect the pages where these valid nodes sit?

--
Thanks,
//richard

\
 
 \ /
  Last update: 2020-03-01 21:47    [W:0.075 / U:4.124 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site