From: Matthew Wilcox <willy@infradead.org>
To: Mike Kravetz <mike.kravetz@oracle.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Michal Hocko <mhocko@kernel.org>,
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
Muchun Song <songmuchun@bytedance.com>,
David Hildenbrand <david@redhat.com>,
Oscar Salvador <osalvador@suse.de>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 2/5] hugetlb: convert page_huge_active() to HP_Migratable flag
Date: Sat, 16 Jan 2021 04:24:16 +0000 [thread overview]
Message-ID: <20210116042416.GA2260413@casper.infradead.org> (raw)
In-Reply-To: <20210116003105.182918-3-mike.kravetz@oracle.com>
On Fri, Jan 15, 2021 at 04:31:02PM -0800, Mike Kravetz wrote:
> +++ b/fs/hugetlbfs/inode.c
> @@ -735,7 +735,7 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset,
>
> mutex_unlock(&hugetlb_fault_mutex_table[hash]);
>
> - set_page_huge_active(page);
> + hugetlb_set_page_flag(page, HP_Migratable);
I had understood the request to be more like ...
SetHPageMigratable(page);
> +++ b/include/linux/hugetlb.h
> @@ -480,9 +480,13 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
> * HP_Restore_Reserve - Set when a hugetlb page consumes a reservation at
> * allocation time. Cleared when page is fully instantiated. Free
> * routine checks flag to restore a reservation on error paths.
> + * HP_Migratable - Set after a newly allocated page is added to the page
> + * cache and/or page tables. Indicates the page is a candidate for
> + * migration.
> */
> enum hugetlb_page_flags {
> HP_Restore_Reserve = 0,
> + HP_Migratable,
> };
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.
next prev parent reply other threads:[~2021-01-16 4:25 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-16 0:31 [PATCH 0/5] create hugetlb flags to consolidate state Mike Kravetz
2021-01-16 0:31 ` [PATCH 1/5] hugetlb: use page.private for hugetlb specific page flags Mike Kravetz
2021-01-16 0:31 ` [PATCH 2/5] hugetlb: convert page_huge_active() to HP_Migratable flag Mike Kravetz
2021-01-16 4:24 ` Matthew Wilcox [this message]
2021-01-16 4:36 ` [External] " Muchun Song
2021-01-16 12:06 ` Oscar Salvador
2021-01-16 21:53 ` Mike Kravetz
2021-01-16 0:31 ` [PATCH 3/5] hugetlb: only set HP_Migratable for migratable hstates Mike Kravetz
2021-01-16 0:31 ` [PATCH 4/5] hugetlb: convert PageHugeTemporary() to HP_Temporary flag Mike Kravetz
2021-01-16 0:31 ` [PATCH 5/5] hugetlb: convert PageHugeFreed to HP_Freed flag Mike Kravetz
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