| Message ID | 20170126115819.58875-17-kirill.shutemov@linux.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Thu, Jan 26, 2017 at 02:57:58PM +0300, Kirill A. Shutemov wrote: > 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@linux.intel.com> Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
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);
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@linux.intel.com> --- mm/huge_memory.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)