On Mon, Jan 16, 2012 at 8:01 AM, Jan Kara <jack@xxxxxxx> wrote:
>
> Hum, let me understand this. I understand the meaning of buffer_uptodate
> bit as "the buffer has at least as new content as what is on disk". Now
> when storage cannot write the block under the buffer, the contents of the
> buffer is still "at least as new as what is (was) on disk".
No.
Stop making crap up.
If the write fails, the buffer contents have *nothing* to do with what
is on disk.
You don't know what the disk contents are.
So clearly the buffer cannot be up-to-date.
Now, feel free to use *other* arguments for why we shouldn't clear the
up-to-date bit, but using the disk contents as one is pure and utter
garbage. And it is *obviously* pure and utter garbage.
Linus
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