On Fri, Aug 29, 2025 at 02:03:36PM +0800, Dongsheng Yang wrote:
>
> 在 8/29/2025 1:39 PM, Dan Carpenter 写道:
> > Hello Dongsheng Yang,
> >
> > Commit 1d57628ff95b ("dm-pcache: add persistent cache target in
> > device-mapper") from Aug 12, 2025 (linux-next), leads to the
> > following Smatch static checker warning:
> >
> > drivers/md/dm-pcache/cache_segment.c:263 cache_seg_gen_increase()
> > warn: sleeping in atomic context
>
>
> Hi Dan,
>
> Thanx for your report, I will send out the patch after my testing
> finished.
>
> BTW, can you share the Smatch checking command or script? I want to add
>
> Smatch check in my testing suit if possible, I did not found this kind of
> problem with simple:
>
> make CHECK="smatch -p=kernel" C=1 M=drivers/md/dm-pcache
>
It requires several rebuilds of the cross function database... Everytime
you rebuild then it does:
First build: cache_data_alloc() disables preemption calls cache_seg_put()
Second build: cache_seg_put() calls cache_seg_invalidate()
Third build: cache_seg_invalidate() calls cache_seg_gen_increase()
Rebuilding the databse takes hours and hours.
~/path/to/smatch/smatch_scripts/build_kernel_data.sh
regards,
dan carpenter
