lkml.org 
[lkml]   [2023]   [Feb]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[RESEND PATCH RFC] mm: pagemap: add vma(VM_PFNMAP) support in pagemap_pte_hole()
Date
pagemap currently does not support vma(FIXMAP), add support
in pagemap_pte_hole().

Signed-off-by: Ke Sun <sunke@kylinos.cn>
---
fs/proc/task_mmu.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index af1c49ae11b1..297c7b9dc630 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1400,6 +1400,11 @@ static int pagemap_pte_hole(unsigned long start, unsigned long end,
if (vma->vm_flags & VM_SOFTDIRTY)
pme = make_pme(0, PM_SOFT_DIRTY);
for (; addr < min(end, vma->vm_end); addr += PAGE_SIZE) {
+ if ((vma->vm_flags & VM_PFNMAP) && vma->vm_pgoff) {
+ unsigned long pgoff = (addr - vma->vm_start) >> PAGE_SHIFT;
+
+ pme = make_pme(vma->vm_pgoff + pgoff, PM_PRESENT);
+ }
err = add_to_pagemap(addr, &pme, pm);
if (err)
goto out;
--
2.25.1
\
 
 \ /
  Last update: 2023-03-27 00:33    [W:0.030 / U:23.896 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site