Re: [PATCH 09/13] x86/tdx: Account shared memory

[kirill.shutemov@xxxxxxxxxxxxxxx]

On Tue, Oct 10, 2023 at 10:05:21AM +0000, Huang, Kai wrote:
> 
> > +#ifdef CONFIG_DEBUG_FS
> > +static int tdx_shared_memory_show(struct seq_file *m, void *p)
> > +{
> > +	unsigned long addr, end;
> > +	unsigned long found = 0;
> > +
> > +	addr = PAGE_OFFSET;
> > +	end  = PAGE_OFFSET + get_max_mapped();
> > +
> > +	while (addr < end) {
> > +		unsigned long size;
> > +		unsigned int level;
> > +		pte_t *pte;
> > +
> > +		pte = lookup_address(addr, &level);
> > +		size = page_level_size(level);
> > +
> > +		if (pte && pte_decrypted(*pte))
> > +			found += size / PAGE_SIZE;
> > +
> > +		addr += size;
> 
> This could be a long loop, perhaps add cond_resched() here?

Sure.

-- 
  Kiryl Shutsemau / Kirill A. Shutemov