On 1/16/21 4:06 AM, Oscar Salvador wrote:

On Sat, Jan 16, 2021 at 04:24:16AM +0000, Matthew Wilcox wrote:

quoted

and name these HPG_restore_reserve and HPG_migratable

and generate the calls to hugetlb_set_page_flag etc from macros, eg:

#define TESTHPAGEFLAG(uname, lname)					\
static __always_inline bool HPage##uname(struct page *page)		\
{ return test_bit(HPG_##lname, &page->private); }
...
#define HPAGEFLAG(uname, lname)						\
	TESTHPAGEFLAG(uname, lname)					\
	SETHPAGEFLAG(uname, lname)					\
	CLEARHPAGEFLAG(uname, lname)

HPAGEFLAG(RestoreReserve, restore_reserve)
HPAGEFLAG(Migratable, migratable)

just to mirror page-flags.h more closely.

That is on me.
I thought that given the low number of flags, we coud get away with:

hugetlb_{set,test,clear}_page_flag(page, flag)

and call it from the code.
But some of the flags need to be set/tested outside hugetlb code, so
it indeed looks nicer and more consistent to follow page-flags.h convention.

Sorry for the noise.

Thanks everyone!

I was unsure about the best way to go for this.  Will send out a new version
in a few days using the page-flag style macros.

-- 
Mike Kravetz