[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20231011131452.r42nemcajjcj77hq@box.shutemov.name>
Date: Wed, 11 Oct 2023 16:14:52 +0300
From: "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>
To: "Huang, Kai" <kai.huang@...el.com>
Cc: "tglx@...utronix.de" <tglx@...utronix.de>,
"mingo@...hat.com" <mingo@...hat.com>,
"x86@...nel.org" <x86@...nel.org>, "bp@...en8.de" <bp@...en8.de>,
"dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
"Edgecombe, Rick P" <rick.p.edgecombe@...el.com>,
"Reshetova, Elena" <elena.reshetova@...el.com>,
"Nakajima, Jun" <jun.nakajima@...el.com>,
"rafael@...nel.org" <rafael@...nel.org>,
"peterz@...radead.org" <peterz@...radead.org>,
"sathyanarayanan.kuppuswamy@...ux.intel.com"
<sathyanarayanan.kuppuswamy@...ux.intel.com>,
"Hunter, Adrian" <adrian.hunter@...el.com>,
"thomas.lendacky@....com" <thomas.lendacky@....com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
"linux-coco@...ts.linux.dev" <linux-coco@...ts.linux.dev>
Subject: Re: [PATCH 09/13] x86/tdx: Account shared memory
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
Powered by blists - more mailing lists