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a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1692796589; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4ONpPYaHebA/SF1xz6SHCYgtyIsQhmlhVB3Qoug5JjE=; b=tPkUy/wSMnt0UulEJ3hboPIh4tNYVvdAxecjVdRpeAqlCrM2pWvbRxzTFGKnVDR/JCviq2 5FX0ZmBLvuFKNxpdjvdjT9wWWkptbBCzep4JUPNJP5fHGaUyC/2q0mAvG1uXDFujC5x4Nz g62gLbD4tFhXUHEW3QKgnH32JscJBhY= Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id CC2FD169C; Wed, 23 Aug 2023 06:17:09 -0700 (PDT) Received: from e121798.cable.virginm.net (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 866CD3F740; Wed, 23 Aug 2023 06:16:23 -0700 (PDT) From: Alexandru Elisei To: catalin.marinas@arm.com, will@kernel.org, oliver.upton@linux.dev, maz@kernel.org, james.morse@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, arnd@arndb.de, akpm@linux-foundation.org, mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, mhiramat@kernel.org, rppt@kernel.org, hughd@google.com Cc: pcc@google.com, steven.price@arm.com, anshuman.khandual@arm.com, vincenzo.frascino@arm.com, david@redhat.com, eugenis@google.com, kcc@google.com, hyesoo.yu@samsung.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org Subject: [PATCH RFC 22/37] mm: shmem: Allocate metadata storage for in-memory filesystems Date: Wed, 23 Aug 2023 14:13:35 +0100 Message-Id: <20230823131350.114942-23-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230823131350.114942-1-alexandru.elisei@arm.com> References: <20230823131350.114942-1-alexandru.elisei@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: DA77DA000A X-Stat-Signature: rbsdfqxazrcitt7jmka9owmib5nhf5mf X-Rspam-User: X-HE-Tag: 1692796589-286739 X-HE-Meta: U2FsdGVkX18rc+HaSLifUSkEPbLc5Vl0gecGwYo/GBwBFi8S3y9TVNNFMIFyze00uTjJLmrvXTpQCFLiJI4EBcom0hCiabQPs3/a6HdO3zK8uTMGJAh5gWvsuOTA5hEBZzc3CMvTqAu2YEvdgyiWLcH4xA/CSCKK4CA5IaLTg8AvOfx0Ibg9bISYpwQ72BT3nCdJhWYDJn9o0jScwarl0fFdUTW37hw3TtK+HphI1Yp4/XC+3plc669aU2GVo6hTqb7/UmgFrkfs3Ohf6FdcinQbxnJWyRpPxP1qGgc5HdCs8dxaxQ4Hey38Cf5LIOpMVHDdWLQfhP6+VN5nGEUxvZzUUHB/Pf73BNl+nlxYONBM+w0TFCTso+ZRXlj80Bpl6HTcbsbjjcoT116gcswLrQ0vf74zlbx9dFB0qg1aGWkR2Tl0to3m+G73c/SC9Lja15A0CnKnKAqGFoK4i55LW0pDhe4ySaB2LTQU1Mp91fS5FCAdbHYkzBEAk5gGAlEsgFwnEAKcglgjZEm3IXVa9s+yLyL7e+kQdXAGuRMDdg3H06henagh/aqHIH5T52v4FM5p1zvdGdpLP+fjhMLvQqnK0L45TFGeOYpO3rxxguQLUYOuaRX3l7Oxknr5xLlMMCW34Wtmlo2TEFMrR/xYEvXnb+noRtpMWxKaWVZyY2ACm/UzvDPGi/5hOx7OohbnfmyOLmiBTIvk6LLcrh0PqNalJfZ+mKxMc7s7DAYjLXXEs9Rgtuf9Gjf5DniNYKooynMkB4q7YuR32fEqAcO9HVcZHIaka5L9yv7Q2l75hfXsr+qdxcEq21QuRTmYnMB6nIOMgJWqv9m12K4p9CgX/l06Wh5UQG6TGL1nePseXMTIaTW3+up9t1uynb15y7IG+xeQfnwHCRtW0BmuZsbIXETE8EWc5zd8x8gQgoDL6VzpfUJkouqkqenxKCg9iwujZYsHbVxIlxEOV08nZr/ 1baazusB lMMvsLm8h0GgG6mIOB9dsnfL5c7TlSpbLtvcfy9Vx2Z9AlTKODzoZGZ8eTpHA6I5Ubj8VxIv3zXMXTmUP7H36buCEMllWdi+kLDS2Jzx4hoIdc5w24Oj+rL/HwTmz471Oi8X5Hbs1AAmSX06wTTc07+u5BPfQXU4Tje4G X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Set __GFP_TAGGED when a new page is faulted in, so the page allocator reserves the corresponding metadata storage. Signed-off-by: Alexandru Elisei --- mm/shmem.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/mm/shmem.c b/mm/shmem.c index 2f2e0e618072..0b772ec34caa 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -81,6 +81,8 @@ static struct vfsmount *shm_mnt; #include +#include + #include "internal.h" #define BLOCKS_PER_PAGE (PAGE_SIZE/512) @@ -1530,7 +1532,7 @@ static struct folio *shmem_swapin(swp_entry_t swap, gfp_t gfp, */ static gfp_t limit_gfp_mask(gfp_t huge_gfp, gfp_t limit_gfp) { - gfp_t allowflags = __GFP_IO | __GFP_FS | __GFP_RECLAIM; + gfp_t allowflags = __GFP_IO | __GFP_FS | __GFP_RECLAIM | __GFP_TAGGED; gfp_t denyflags = __GFP_NOWARN | __GFP_NORETRY; gfp_t zoneflags = limit_gfp & GFP_ZONEMASK; gfp_t result = huge_gfp & ~(allowflags | GFP_ZONEMASK); @@ -1941,6 +1943,8 @@ static int shmem_get_folio_gfp(struct inode *inode, pgoff_t index, goto alloc_nohuge; huge_gfp = vma_thp_gfp_mask(vma); + if (vma_has_metadata(vma)) + huge_gfp |= __GFP_TAGGED; huge_gfp = limit_gfp_mask(huge_gfp, gfp); folio = shmem_alloc_and_acct_folio(huge_gfp, inode, index, true); if (IS_ERR(folio)) { @@ -2101,6 +2105,10 @@ static vm_fault_t shmem_fault(struct vm_fault *vmf) int err; vm_fault_t ret = VM_FAULT_LOCKED; + /* Fixup gfp flags for metadata enabled VMAs. */ + if (vma_has_metadata(vma)) + gfp |= __GFP_TAGGED; + /* * Trinity finds that probing a hole which tmpfs is punching can * prevent the hole-punch from ever completing: which in turn -- 2.41.0