[PATCHv6 16/37] thp: make thp_get_unmapped_area() respect S_HUGE_MODE

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



We want mmap(NULL) to return PMD-aligned address if the inode can have
huge pages in page cache.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
 mm/huge_memory.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 55aee62e8444..2b1d8d13e2c3 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -528,10 +528,12 @@ unsigned long thp_get_unmapped_area(struct file *filp, unsigned long addr,
 		unsigned long len, unsigned long pgoff, unsigned long flags)
 {
 	loff_t off = (loff_t)pgoff << PAGE_SHIFT;
+	struct inode *inode = filp->f_mapping->host;
 
 	if (addr)
 		goto out;
-	if (!IS_DAX(filp->f_mapping->host) || !IS_ENABLED(CONFIG_FS_DAX_PMD))
+	if ((inode->i_flags & S_HUGE_MODE) == S_HUGE_NEVER &&
+			(!IS_DAX(inode) || !IS_ENABLED(CONFIG_FS_DAX_PMD)))
 		goto out;
 
 	addr = __thp_get_unmapped_area(filp, len, off, flags, PMD_SIZE);
-- 
2.11.0

--
To unsubscribe from this list: send the line "unsubscribe linux-block" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux RAID]     [Linux SCSI]     [Linux ATA RAID]     [IDE]     [Linux Wireless]     [Linux Kernel]     [ATH6KL]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Device Mapper]

  Powered by Linux