From nobody Tue Sep 29 14:53:52 2026 Received: from lgeamrelo03.lge.com (lgeamrelo03.lge.com [156.147.51.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 387A6448BA1 for ; Thu, 6 Aug 2026 19:21:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=156.147.51.102 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786044100; cv=none; b=HqkWsmZ4XLK+QRXVuEDWJvpahTpcOnc5JZvesmLMNTfkZvycgZwIr6LEjhrAw3+g4gB/LiNm3gQXbeOVYM5fWCZGt7JRGBM6t5qrG3mp9Uivj6xPNQG5CzswoQQVUc4qwzgtkId6ZVyKQNJkMISh9P75GX6C6XaiVJDuZeRhzxc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786044100; c=relaxed/simple; bh=DnZ90cunXdyJuSnX0WxFMcKhgGUI90RWmY0NT+2kH2I=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=tqERh7J7iIW5IqWczItp+6ZpIaC0iZ0qy86Vj3ZTiLJEDlwU8EmjuKjaHeMdrIl+sE6qfNzSgHN9QXCIDrFEnWjO5VFAqjYuQ1D0Xj7crcBKoptmma6nCrgRS7UpPcgoXFlaEjG7bJBxE3lgDCtUgo4LXsLlxJRsN15zZX/fYl8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lge.com; spf=pass smtp.mailfrom=lge.com; arc=none smtp.client-ip=156.147.51.102 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lge.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lge.com Received: from unknown (HELO yjaykim-PowerEdge-T330.lge.net) (10.177.112.156) by 156.147.51.102 with ESMTP; 7 Aug 2026 04:06:36 +0900 X-Original-SENDERIP: 10.177.112.156 X-Original-MAILFROM: youngjun.park@lge.com From: Youngjun Park To: Andrew Morton Cc: Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Baoquan He , Barry Song , Jianyue Wu , Youngjun Park , her0gyugyu@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/4] mm, swap: don't free a hibernation slot that is in the swap cache Date: Fri, 7 Aug 2026 04:06:33 +0900 Message-Id: <20260806190636.446205-2-youngjun.park@lge.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260806190636.446205-1-youngjun.park@lge.com> References: <20260806190636.446205-1-youngjun.park@lge.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" A slot with a folio in the swap cache is freed when the folio leaves the cache, not when its count drops. swap_put_entries_cluster() follows that rule. swap_free_hibernation_slot() does not, it calls __swap_cluster_free_entries() whether or not a folio sits on the slot. Cluster readahead can put one there. It walks a raw page_cluster sized window of offsets around the faulting entry, and a hibernation slot passes __swap_cache_add_check() because it is not a folio and its count is not zero. Freeing the slot then clears the entry under that folio. The folio is now unreachable from the swap table, and the offset goes back to the allocator. The folio is still on the LRU though, so reclaim can pick it up later. It then takes the old offset out of folio->swap and overwrites the table entry there, which by then may belong to someone else. Check for a cached folio before freeing. The slot is then left in the ordinary state where only the swap cache holds it, and it is freed when the folio leaves the cache, either through the reclaim below or through normal reclaim later. Fixes: 0d6af9bcf383 ("mm, swap: use the swap table to track the swap count") Signed-off-by: Youngjun Park Acked-by: Kairui Song --- mm/swapfile.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/mm/swapfile.c b/mm/swapfile.c index dea2d3b36e06..f5dfc7e59191 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -2202,7 +2202,14 @@ void swap_free_hibernation_slot(swp_entry_t entry) =20 ci =3D swap_cluster_lock(si, offset); __swap_cluster_put_entry(ci, offset % SWAPFILE_CLUSTER); - __swap_cluster_free_entries(si, ci, offset % SWAPFILE_CLUSTER, 1); + /* + * A slot with a folio in the swap cache is freed when the folio + * leaves the cache, the same rule swap_put_entries_cluster() follows. + * Readahead can put a folio here, and freeing the slot now would + * leave that folio with no entry behind it. + */ + if (!swp_tb_is_folio(__swap_table_get(ci, offset % SWAPFILE_CLUSTER))) + __swap_cluster_free_entries(si, ci, offset % SWAPFILE_CLUSTER, 1); swap_cluster_unlock(ci); =20 /* In theory readahead might add it to the swap cache by accident */ --=20 2.48.1 From nobody Tue Sep 29 14:53:52 2026 Received: from lgeamrelo03.lge.com (lgeamrelo03.lge.com [156.147.51.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3888447AF6E for ; Thu, 6 Aug 2026 19:21:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=156.147.51.102 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786044102; cv=none; b=tRzrcNl3U4+UDwaqgWqs1+FUhf9R0rgJ+XiTBCDx7jZpdkoRdMGlm0cVVGFh4VUR/uXWCfspf/ZRuXGH+ksMvesk1EPJST/AObQUtIkSTYdlss+Pu6twy8FItuQP8gF9VE4lLKKbx/3dylN7a5eCpIAu7DfuQvcCoD3CO/rKAoo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786044102; c=relaxed/simple; bh=g+HAfE15XG42K7Lt/AgnJpNQu+rKb8nt+qWRXAVj324=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=AsZ5wjSaFbUQGyKbUcUvia3YLdsEV3JwnqKb06qnYfaV1pbQU/N1+du/X4Z2NDhXnmvjIrTqVJlkFpcAbt/vUKW68Cpgn8/Q7gfstm4jRQg4khdX8wobxFCCABmMTLjSHWdXGYEP5EPpySm4cUqPlRyX5iOniHutWtxGL93tE9g= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lge.com; spf=pass smtp.mailfrom=lge.com; arc=none smtp.client-ip=156.147.51.102 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lge.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lge.com Received: from unknown (HELO yjaykim-PowerEdge-T330.lge.net) (10.177.112.156) by 156.147.51.102 with ESMTP; 7 Aug 2026 04:06:36 +0900 X-Original-SENDERIP: 10.177.112.156 X-Original-MAILFROM: youngjun.park@lge.com From: Youngjun Park To: Andrew Morton Cc: Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Baoquan He , Barry Song , Jianyue Wu , Youngjun Park , her0gyugyu@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/4] mm, swap: give hibernation swap slots their own swap table entry type Date: Fri, 7 Aug 2026 04:06:34 +0900 Message-Id: <20260806190636.446205-3-youngjun.park@lge.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260806190636.446205-1-youngjun.park@lge.com> References: <20260806190636.446205-1-youngjun.park@lge.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" swap_alloc_hibernation_slot() stores a fake shadow in the slot it hands out. An anon slot swapped out with no workingset shadow looks exactly the same, so nothing in mm can tell the two apart. Give hibernation slots their own type. Bit 4 and every bit above it are set, the same shape as SWP_TB_BAD. Bits 0 to 3 are taken by the shadow, PFN, pointer and bad marks, so bit 4 is the first free one. Neither type holds data, so the value alone says what it is. The entry has no swap count. Hibernation only allocates and frees a slot, so a count would never change. swap_free_hibernation_slot() frees the slot directly, there is no count to put first. The next patch needs these slots to stop looking like shadows. Suggested-by: Kairui Song Link: https://lore.kernel.org/linux-mm/abp7aDgYLrxF3Me8@KASONG-MC4/ Signed-off-by: Youngjun Park --- mm/swap_table.h | 12 ++++++++++++ mm/swapfile.c | 13 +++++++------ 2 files changed, 19 insertions(+), 6 deletions(-) diff --git a/mm/swap_table.h b/mm/swap_table.h index e6613e62f8d0..c1c516bcc17e 100644 --- a/mm/swap_table.h +++ b/mm/swap_table.h @@ -30,6 +30,7 @@ struct swap_memcg_table { * PFN: |SWAP_COUNT|Z|------ PFN -------|10| - Cached slot * Pointer: |----------- Pointer ----------|100| - (Unused) * Bad: |------------- 1 -------------|1000| - Bad slot + * Hibern: |------------ 1 -------------|10000| - Hibernation slot * * COUNT is `SWP_TB_COUNT_BITS` long, Z is the `SWP_TB_ZERO_FLAG` bit, * and together they form the `SWP_TB_FLAGS_BITS` wide flags field. @@ -54,6 +55,9 @@ struct swap_memcg_table { * aligned pointers. * * - Bad: Swap slot is reserved, protects swap header or holes on swap dev= ices. + * + * - Hibern: Swap slot is reserved by hibernation for the suspend image, a= nd + * must never enter the swap cache. */ =20 /* NULL Entry, all 0 */ @@ -81,6 +85,9 @@ struct swap_memcg_table { /* Bad slot: ends with 0b1000 and rests of bits are all 1 */ #define SWP_TB_BAD ((~0UL) << 3) =20 +/* Hibernation slot: ends with 0b10000 and rests of bits are all 1 */ +#define SWP_TB_HIB ((~0UL) << 4) + /* Macro for shadow offset calculation */ #define SWAP_COUNT_SHIFT SWP_TB_FLAGS_BITS =20 @@ -166,6 +173,11 @@ static inline bool swp_tb_is_bad(unsigned long swp_tb) return swp_tb =3D=3D SWP_TB_BAD; } =20 +static inline bool swp_tb_is_hibernation(unsigned long swp_tb) +{ + return swp_tb =3D=3D SWP_TB_HIB; +} + static inline bool swp_tb_is_countable(unsigned long swp_tb) { return (swp_tb_is_shadow(swp_tb) || swp_tb_is_folio(swp_tb) || diff --git a/mm/swapfile.c b/mm/swapfile.c index f5dfc7e59191..a337387f7431 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -928,7 +928,7 @@ static bool __swap_cluster_alloc_entries(struct swap_in= fo_struct *si, * upon folio unmap. * * Else, it's a exclusive order 0 allocation for hibernation. - * The slot starts with count =3D=3D 1 and never increases. + * The slot carries no swap count and is freed by offset. */ if (likely(folio)) { order =3D folio_order(folio); @@ -940,8 +940,8 @@ static bool __swap_cluster_alloc_entries(struct swap_in= fo_struct *si, order =3D 0; nr_pages =3D 1; swap_cluster_assert_empty(ci, ci_off, 1, false); - /* Fake shadow placeholder with no flag, hibernation does not use the ze= romap */ - __swap_table_set(ci, ci_off, __swp_tb_mk_count(shadow_to_swp_tb(NULL, 0)= , 1)); + /* Exclusively owned by hibernation, must never enter the swap cache */ + __swap_table_set(ci, ci_off, SWP_TB_HIB); } else { /* Allocation without folio is only possible with hibernation */ WARN_ON_ONCE(1); @@ -1929,9 +1929,11 @@ void __swap_cluster_free_entries(struct swap_info_st= ruct *si, old_tb =3D __swap_table_get(ci, ci_off); /* * Freeing is done after release of the last swap count - * ref, or after swap cache is dropped + * ref, or after swap cache is dropped. A hibernation slot + * has no count and is freed directly by its owner. */ - VM_WARN_ON(!swp_tb_is_shadow(old_tb) || __swp_tb_get_count(old_tb) > 1); + VM_WARN_ON(!swp_tb_is_hibernation(old_tb) && + (!swp_tb_is_shadow(old_tb) || __swp_tb_get_count(old_tb) > 1)); =20 /* Resetting the slot to NULL also clears the inline flags. */ __swap_table_set(ci, ci_off, null_to_swp_tb()); @@ -2201,7 +2203,6 @@ void swap_free_hibernation_slot(swp_entry_t entry) pgoff_t offset =3D swp_offset(entry); =20 ci =3D swap_cluster_lock(si, offset); - __swap_cluster_put_entry(ci, offset % SWAPFILE_CLUSTER); /* * A slot with a folio in the swap cache is freed when the folio * leaves the cache, the same rule swap_put_entries_cluster() follows. --=20 2.48.1 From nobody Tue Sep 29 14:53:52 2026 Received: from lgeamrelo03.lge.com (lgeamrelo03.lge.com [156.147.51.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 38982486B9A for ; Thu, 6 Aug 2026 19:21:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=156.147.51.102 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786044102; cv=none; b=TsFHqF/uMab7uvUqzFbgFBvOySIuExEaH+x4QhRnHUe9qymYXKtX3ypnjyLVr1p0WPGv3JMIIrCDjwy2keaTIaLhoPsRUg0mBM0rVoFWfObBNBDNTWChmf8iQ2ADvfhzuj/ixnXpN3GYNKFv3FAWus+2jGx8CmH9vJ69eEu2OJg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786044102; c=relaxed/simple; bh=tvedFFDG0v0nK4UHcbQHu/cv4PfffCZwjc4utGb+RLU=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ZQSbpMhFk77KMipwNQtJdSkIEBRmH8xL/4ZexufrHwx+/zwMDx0nRkXyqd1fd7xDhA7BIYtknTVvXDNLv7VKrZRIoZmUQXs81ng3wFvHMaIuNUFg4L8gf6+WvktJ2ZwZd1P46ps+pAn6ZmmKmCYUqvR/paSUutbzXLtn8Va+shU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lge.com; spf=pass smtp.mailfrom=lge.com; arc=none smtp.client-ip=156.147.51.102 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lge.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lge.com Received: from unknown (HELO yjaykim-PowerEdge-T330.lge.net) (10.177.112.156) by 156.147.51.102 with ESMTP; 7 Aug 2026 04:06:36 +0900 X-Original-SENDERIP: 10.177.112.156 X-Original-MAILFROM: youngjun.park@lge.com From: Youngjun Park To: Andrew Morton Cc: Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Baoquan He , Barry Song , Jianyue Wu , Youngjun Park , her0gyugyu@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/4] mm, swap: only allow swapped-out slots into the swap cache Date: Fri, 7 Aug 2026 04:06:35 +0900 Message-Id: <20260806190636.446205-4-youngjun.park@lge.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260806190636.446205-1-youngjun.park@lge.com> References: <20260806190636.446205-1-youngjun.park@lge.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" __swap_cache_add_check() turns away folio entries and slots with no count and lets everything else in. That is safe only when the caller owns the slot. Cluster readahead owns nothing, it walks a raw page_cluster sized window of offsets around the faulting entry. A hibernation slot is not a folio, and the count test does not stop it either, because the type the previous patch added has the count bits set. So readahead allocates a folio and reads the offset off the device into it, for a slot that nothing will ever swap in. A bad slot listed in the swap header gets in the same way, its count bits are set too, and the folio entry that replaces it drops the bad marker. The first patch keeps that folio from doing harm, but the folio and the read still happen. Require a shadow entry instead. A slot dropped from the swap cache always gets one, empty if there is no workingset value. The check runs before the folio allocation in __swap_cache_alloc(), so readahead now skips the offset without allocating or reading. Signed-off-by: Youngjun Park --- mm/swap_state.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/mm/swap_state.c b/mm/swap_state.c index 5be825911e64..9f2cc5918713 100644 --- a/mm/swap_state.c +++ b/mm/swap_state.c @@ -180,9 +180,14 @@ static int __swap_cache_add_check(struct swap_cluster_= info *ci, old_tb =3D __swap_table_get(ci, ci_off); if (swp_tb_is_folio(old_tb)) return -EEXIST; - if (!__swp_tb_get_count(old_tb)) + /* + * Only a swapped-out slot may be brought into the swap cache. + * Cluster readahead walks raw offset ranges, so it can land on + * slots that are free, bad, or owned by hibernation. + */ + if (!swp_tb_is_shadow(old_tb) || !__swp_tb_get_count(old_tb)) return -ENOENT; - if (shadowp && swp_tb_is_shadow(old_tb)) + if (shadowp) *shadowp =3D swp_tb_to_shadow(old_tb); if (memcg_id) *memcg_id =3D __swap_cgroup_get(ci, ci_off); --=20 2.48.1 From nobody Tue Sep 29 14:53:52 2026 Received: from lgeamrelo03.lge.com (lgeamrelo03.lge.com [156.147.51.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 386B24314A0 for ; Thu, 6 Aug 2026 19:21:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=156.147.51.102 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786044100; cv=none; b=XrNM5HxHukNj6arg07mltpxcP/Tfn7yjXJCXNhKxJdFajY6Hq5/jca00xjPUaaxClFxHeiZhtD99H9e+YDJmeWgDUxbJ899H885tcerBMHKDzasQEwZgO/5t2z5Ipkokv/Z3bMxOIky1YCBdfpg8iZmn52esiCNf1XXlfjCD/K0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786044100; c=relaxed/simple; bh=eamNiRxzzAgCNKSmJb42LRvczYR/SnxQ2Z3nQrPmBNo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=G1/aXnzQiXBm6aDp5M4cpNSBwd18SOWTAQHv7DzYeepo0qbvdekAswLnBvL8LKYHxSnI/jIERop1LRrgQNWphNYeTaKkjVKPkuHxyRJN7SfV1W3rE4Lh9wZfBu+a0IFASOzDo3zLd3IHAX9Ehtk+ZndTPsVmyoxiTIzdrkuepV8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lge.com; spf=pass smtp.mailfrom=lge.com; arc=none smtp.client-ip=156.147.51.102 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lge.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lge.com Received: from unknown (HELO yjaykim-PowerEdge-T330.lge.net) (10.177.112.156) by 156.147.51.102 with ESMTP; 7 Aug 2026 04:06:36 +0900 X-Original-SENDERIP: 10.177.112.156 X-Original-MAILFROM: youngjun.park@lge.com From: Youngjun Park To: Andrew Morton Cc: Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Baoquan He , Barry Song , Jianyue Wu , Youngjun Park , her0gyugyu@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/4] mm, swap: drop the swap cache guard and reclaim in swap_free_hibernation_slot() Date: Fri, 7 Aug 2026 04:06:36 +0900 Message-Id: <20260806190636.446205-5-youngjun.park@lge.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260806190636.446205-1-youngjun.park@lge.com> References: <20260806190636.446205-1-youngjun.park@lge.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Both are there for a folio that readahead might have put on the slot. The previous patch turns these slots away at the swap cache boundary, so no such folio can exist. Signed-off-by: Youngjun Park --- mm/swapfile.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) diff --git a/mm/swapfile.c b/mm/swapfile.c index a337387f7431..4fba1770ce61 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -2203,18 +2203,8 @@ void swap_free_hibernation_slot(swp_entry_t entry) pgoff_t offset =3D swp_offset(entry); =20 ci =3D swap_cluster_lock(si, offset); - /* - * A slot with a folio in the swap cache is freed when the folio - * leaves the cache, the same rule swap_put_entries_cluster() follows. - * Readahead can put a folio here, and freeing the slot now would - * leave that folio with no entry behind it. - */ - if (!swp_tb_is_folio(__swap_table_get(ci, offset % SWAPFILE_CLUSTER))) - __swap_cluster_free_entries(si, ci, offset % SWAPFILE_CLUSTER, 1); + __swap_cluster_free_entries(si, ci, offset % SWAPFILE_CLUSTER, 1); swap_cluster_unlock(ci); - - /* In theory readahead might add it to the swap cache by accident */ - __try_to_reclaim_swap(si, offset, TTRS_ANYWAY); } =20 static int __find_hibernation_swap_type(dev_t device, sector_t offset) --=20 2.48.1