Re: Kernel crash due to alloc_tag_top_users() being called when !mem_profiling_support?

[Uladzislau Rezki]

On Fri, Jun 20, 2025 at 12:04:50AM +0900, Harry Yoo wrote:
> On Thu, Jun 19, 2025 at 11:10:43PM +0900, Harry Yoo wrote:
> > On Wed, Jun 18, 2025 at 02:25:37PM +0800, kernel test robot wrote:
> > > 
> > > Hello,
> > > 
> > > for this change, we reported
> > > "[linux-next:master] [lib/test_vmalloc.c]  7fc85b92db: Mem-Info"
> > > in
> > > https://lore.kernel.org/all/202505071555.e757f1e0-lkp@xxxxxxxxx/
> > > 
> > > at that time, we made some tests with x86_64 config which runs well.
> > > 
> > > now we noticed the commit is in mainline now.
> > 
> > (Re-sending due to not Ccing people and the list...)
> > 
> > Hi, I'm facing the same error on my testing environment.
> 
> I should have clarified that the reason the kernel failed to allocate
> memory on my machine was due to running out of memory, not because of the
> vmalloc test module.
> 
> But based on the fact that the test case (align_shift_alloc_test) is
> expected to fail, the issue here is not memory allocation failure
> itself, but rather that the kernel crashes when the allocation fails.
> 
It looks someone tries to test the CONFIG_TEST_VMALLOC=y as built-in
approach test-cases. Yes, it will trigger a lot of warnings as some
use cases are supposed to be failed. This will trigger a lot of kernel
warnings which can be considered by test-robot or people as problem.

In this case i can exclude those use cases or even not run at all unless
boot-parameters properly sets if built-in.

--
Uladzislau Rezki