Messages in this thread | | | From | Richard Weinberger <> | Date | Sun, 1 Mar 2020 21:46:21 +0100 | Subject | Re: [PATCH] ubifs: Don't discard nodes in recovery when ecc err detected |
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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
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