On 1/16/22 8:18 PM, Matthew Wilcox (Oracle) wrote:
From: William Kucharski <william.kucharski@xxxxxxxxxx>
When we have the opportunity to use PMDs to map a file, we want to follow
the same rules as DAX.
Signed-off-by: William Kucharski <william.kucharski@xxxxxxxxxx>
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
---
mm/huge_memory.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index f58524394dc1..28c29a0d854b 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -582,13 +582,10 @@ unsigned long thp_get_unmapped_area(struct file *filp, unsigned long addr,
unsigned long ret;
loff_t off = (loff_t)pgoff << PAGE_SHIFT;
- if (!IS_DAX(filp->f_mapping->host) || !IS_ENABLED(CONFIG_FS_DAX_PMD))
- goto out;
-
ret = __thp_get_unmapped_area(filp, addr, len, off, flags, PMD_SIZE);
if (ret)
return ret;
-out:
+
return current->mm->get_unmapped_area(filp, addr, len, pgoff, flags);
Hi, Matthew
It seems this patch will make all file mappings align with PMD_SIZE? And
support realize all file THP, not only executable file THP?
Actually, what I want to say is we had merged a similar patch to only
align DSO mapping in glibc:
"718fdd8 elf: Properly align PT_LOAD segments [BZ #28676]"
}
EXPORT_SYMBOL_GPL(thp_get_unmapped_area);
