Re: [PATCH] iomap: Set all uptodate bits for an Uptodate page

[Qian Cai <cai@redhat.com>]

On Thu, 2020-09-24 at 20:27 +0200, Sedat Dilek wrote:
> I run both linux-kernel on my Debian/unstable AMD64 host (means not in
> a VM) with and without your patch.
> 
> Instructions:
> cd /opt/ltp
> ./runltp -f syscalls -s preadv203
> 
> Unfortunately, the logs in the "results" directory have only the short
> summary.
> 
> Testcase                                           Result     Exit Value
> --------                                           ------     ----------
> preadv203                                          PASS       0
> preadv203_64                                       PASS       0
> 
> So, I guess I am not hitting the issue?
> Or do I miss some important kernel-config?

https://gitlab.com/cailca/linux-mm/-/blob/master/arm64.config

That is .config I used to reproduce. Then, I ran the linux-mm testsuite (lots of
hard-coded places because I only need to run this on RHEL8) first:

# git clone https://gitlab.com/cailca/linux-mm
# cd linux-mm; make
# ./random -k

Then, run the whole LTP syscalls:
# ./runltp -f syscalls

If that is still not triggered, it needs some syscall fuzzing:
# ./random -x 0-100 -f