lkml.org 
[lkml]   [2023]   [Jul]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH v24 2/5] fs/proc/task_mmu: Implement IOCTL to get and optionally clear info about PTEs
On Tue, Jul 11, 2023 at 5:53 AM Muhammad Usama Anjum
<usama.anjum@collabora.com> wrote:

<snip>

> +static int pagemap_scan_pte_hole(unsigned long addr, unsigned long end,
> + int depth, struct mm_walk *walk)
> +{
> + unsigned long n_pages = (end - addr)/PAGE_SIZE;
> + struct pagemap_scan_private *p = walk->private;
> + struct vm_area_struct *vma = walk->vma;
> + int ret = 0;
> +
> + if (!vma)
> + return 0;
> +
> + if (IS_PM_SCAN_GET(p->flags)) {
> + if (n_pages > p->max_pages - p->found_pages)
> + n_pages = p->max_pages - p->found_pages;
> +
> + ret = pagemap_scan_output(PM_SCAN_FLAGS(false, false, false,
> + false, false), p, addr, n_pages);

Why do we report holes unconditionally?

> + }
> +
> + if (IS_PM_SCAN_WP(p->flags) &&
> + uffd_wp_range(vma, addr, end - addr, true) < 0)
> + ret = -EINVAL;
> +
> + return ret;
> +}

Thanks,
Andrei

\
 
 \ /
  Last update: 2023-07-11 21:43    [W:0.075 / U:0.292 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site