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X-CSE-ConnectionGUID: hxgJCxJ7SiODXHbEb8gy2A== X-CSE-MsgGUID: UWYZWiZrQoiSPAkZJvWTpA== X-IronPort-AV: E=McAfee;i="6700,10204,11373"; a="65624095" X-IronPort-AV: E=Sophos;i="6.14,246,1736841600"; d="scan'208";a="65624095" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Mar 2025 17:24:48 -0700 X-CSE-ConnectionGUID: LAy2uxrESyanpHv5FWo50g== X-CSE-MsgGUID: PW7BqhysRs+1bdgoueIuUg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.14,246,1736841600"; d="scan'208";a="152311962" Received: from dnelso2-mobl.amr.corp.intel.com (HELO [10.125.108.212]) ([10.125.108.212]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Mar 2025 17:24:47 -0700 Message-ID: Subject: Re: [PATCH 8/9] mm: swap: factor out helper to drop cache of entries within a single cluster From: Tim Chen To: Kemeng Shi , akpm@linux-foundation.org Cc: kasong@tencent.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Date: Fri, 14 Mar 2025 17:24:47 -0700 In-Reply-To: <20250313210515.9920-9-shikemeng@huaweicloud.com> References: <20250313210515.9920-1-shikemeng@huaweicloud.com> <20250313210515.9920-9-shikemeng@huaweicloud.com> Autocrypt: addr=tim.c.chen@linux.intel.com; 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charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.4 (3.50.4-1.fc39) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Fri, 2025-03-14 at 05:05 +0800, Kemeng Shi wrote: > Factor out helper swap_entries_put_cache() from put_swap_folio() to serve= r > as a general-purpose routine for dropping cache flag of entries within a > single cluster. >=20 > Signed-off-by: Kemeng Shi Reviewed-by: Tim Chen > --- > mm/swapfile.c | 25 ++++++++++++++++--------- > 1 file changed, 16 insertions(+), 9 deletions(-) >=20 > diff --git a/mm/swapfile.c b/mm/swapfile.c > index ebac9ff74ba7..343b34eb2a81 100644 > --- a/mm/swapfile.c > +++ b/mm/swapfile.c > @@ -1473,6 +1473,21 @@ struct swap_info_struct *get_swap_device(swp_entry= _t entry) > return NULL; > } > =20 > +static void swap_entries_put_cache(struct swap_info_struct *si, > + swp_entry_t entry, int nr) > +{ > + unsigned long offset =3D swp_offset(entry); > + struct swap_cluster_info *ci; > + > + ci =3D lock_cluster(si, offset); > + if (swap_only_has_cache(si, offset, nr)) > + swap_entries_free(si, ci, entry, nr); > + else > + for (int i =3D 0; i < nr; i++, entry.val++) > + swap_entry_put_locked(si, ci, entry, SWAP_HAS_CACHE); > + unlock_cluster(ci); > +} > + > static bool swap_entries_put_map(struct swap_info_struct *si, > swp_entry_t entry, int nr) > { > @@ -1597,8 +1612,6 @@ void swap_free_nr(swp_entry_t entry, int nr_pages) > */ > void put_swap_folio(struct folio *folio, swp_entry_t entry) > { > - unsigned long offset =3D swp_offset(entry); > - struct swap_cluster_info *ci; > struct swap_info_struct *si; > int size =3D 1 << swap_entry_order(folio_order(folio)); > =20 > @@ -1606,13 +1619,7 @@ void put_swap_folio(struct folio *folio, swp_entry= _t entry) > if (!si) > return; > =20 > - ci =3D lock_cluster(si, offset); > - if (swap_only_has_cache(si, offset, size)) > - swap_entries_free(si, ci, entry, size); > - else > - for (int i =3D 0; i < size; i++, entry.val++) > - swap_entry_put_locked(si, ci, entry, SWAP_HAS_CACHE); > - unlock_cluster(ci); > + swap_entries_put_cache(si, entry, size); > } > =20 > int __swap_count(swp_entry_t entry)