From patchwork Thu Mar 21 13:16:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kefeng Wang X-Patchwork-Id: 13598745 Received: from szxga05-in.huawei.com (szxga05-in.huawei.com [45.249.212.191]) (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 A099A84A24; Thu, 21 Mar 2024 13:16:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.191 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711027017; cv=none; b=o0b5uNBSGLnUU+Cg4RL7nQeA+XFF4kbyyRyaEtPe/aUgcGbJRKpO0tzaxVUQTvgBR9O7k26rp+QnxSHUBpePd1OAQLHyqPblYh3IL8cbZ4aMd3vqsfnbFVCd8P3FNlbGfKflWFSUtqV8vX9jvmtjgouv44MZ7dLcoKhJOnYIhPM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711027017; c=relaxed/simple; bh=NsumehlTMfAmBoVBz4fEeLWxZOo7jZMjeA+jl2erW6k=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=QDC83FyhRn2YIwAaT0ThDkrq5dlx72RJIxq/yrcsLZ4UK7xf3bV0CrKO+HkcYaFz2y6HTS7qNP+Qyhx/4+aU0qEYA/B+ziidq33fVgrOc2ybBnKIX+rAp55Ta8yl+7dKJ+ku72vmZeMlQAktxVjEBqv3UAusu0AR0Vz8MHq0lRQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.191 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.163.17]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4V0mBc6n98z1h39H; Thu, 21 Mar 2024 21:14:16 +0800 (CST) Received: from dggpemm100001.china.huawei.com (unknown [7.185.36.93]) by mail.maildlp.com (Postfix) with ESMTPS id 272291A0172; Thu, 21 Mar 2024 21:16:51 +0800 (CST) Received: from localhost.localdomain (10.175.112.125) by dggpemm100001.china.huawei.com (7.185.36.93) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.35; Thu, 21 Mar 2024 21:16:50 +0800 From: Kefeng Wang To: Alexander Viro , Benjamin LaHaise , Christian Brauner , Jan Kara , , Matthew Wilcox CC: , , Kefeng Wang Subject: [PATCH v2 3/3] fs: aio: convert to ring_folios and internal_folios Date: Thu, 21 Mar 2024 21:16:40 +0800 Message-ID: <20240321131640.948634-4-wangkefeng.wang@huawei.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20240321131640.948634-1-wangkefeng.wang@huawei.com> References: <20240321131640.948634-1-wangkefeng.wang@huawei.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggpemm100001.china.huawei.com (7.185.36.93) Since aio use folios in most functions, convert ring/internal_pages to ring/internal_folios, let's directly use folio instead of page throughout aio to remove hidden calls to compound_head(), eg, flush_dcache_page(). Signed-off-by: Kefeng Wang --- fs/aio.c | 62 ++++++++++++++++++++++++++++---------------------------- 1 file changed, 31 insertions(+), 31 deletions(-) diff --git a/fs/aio.c b/fs/aio.c index 738654b58bfb..fb22a17859c6 100644 --- a/fs/aio.c +++ b/fs/aio.c @@ -122,7 +122,7 @@ struct kioctx { unsigned long mmap_base; unsigned long mmap_size; - struct page **ring_pages; + struct folio **ring_folios; long nr_pages; struct rcu_work free_rwork; /* see free_ioctx() */ @@ -160,7 +160,7 @@ struct kioctx { spinlock_t completion_lock; } ____cacheline_aligned_in_smp; - struct page *internal_pages[AIO_RING_PAGES]; + struct folio *internal_folios[AIO_RING_PAGES]; struct file *aio_ring_file; unsigned id; @@ -334,20 +334,20 @@ static void aio_free_ring(struct kioctx *ctx) put_aio_ring_file(ctx); for (i = 0; i < ctx->nr_pages; i++) { - struct folio *folio = page_folio(ctx->ring_pages[i]); + struct folio *folio = ctx->ring_folios[i]; if (!folio) continue; pr_debug("pid(%d) [%d] folio->count=%d\n", current->pid, i, folio_ref_count(folio)); - ctx->ring_pages[i] = NULL; + ctx->ring_folios[i] = NULL; folio_put(folio); } - if (ctx->ring_pages && ctx->ring_pages != ctx->internal_pages) { - kfree(ctx->ring_pages); - ctx->ring_pages = NULL; + if (ctx->ring_folios && ctx->ring_folios != ctx->internal_folios) { + kfree(ctx->ring_folios); + ctx->ring_folios = NULL; } } @@ -442,7 +442,7 @@ static int aio_migrate_folio(struct address_space *mapping, struct folio *dst, idx = src->index; if (idx < (pgoff_t)ctx->nr_pages) { /* Make sure the old folio hasn't already been changed */ - if (ctx->ring_pages[idx] != &src->page) + if (ctx->ring_folios[idx] != src) rc = -EAGAIN; } else rc = -EINVAL; @@ -466,8 +466,8 @@ static int aio_migrate_folio(struct address_space *mapping, struct folio *dst, */ spin_lock_irqsave(&ctx->completion_lock, flags); folio_migrate_copy(dst, src); - BUG_ON(ctx->ring_pages[idx] != &src->page); - ctx->ring_pages[idx] = &dst->page; + BUG_ON(ctx->ring_folios[idx] != src); + ctx->ring_folios[idx] = dst; spin_unlock_irqrestore(&ctx->completion_lock, flags); /* The old folio is no longer accessible. */ @@ -517,11 +517,11 @@ static int aio_setup_ring(struct kioctx *ctx, unsigned int nr_events) nr_events = (PAGE_SIZE * nr_pages - sizeof(struct aio_ring)) / sizeof(struct io_event); - ctx->ring_pages = ctx->internal_pages; + ctx->ring_folios = ctx->internal_folios; if (nr_pages > AIO_RING_PAGES) { - ctx->ring_pages = kcalloc(nr_pages, sizeof(struct page *), - GFP_KERNEL); - if (!ctx->ring_pages) { + ctx->ring_folios = kcalloc(nr_pages, sizeof(struct folio *), + GFP_KERNEL); + if (!ctx->ring_folios) { put_aio_ring_file(ctx); return -ENOMEM; } @@ -540,7 +540,7 @@ static int aio_setup_ring(struct kioctx *ctx, unsigned int nr_events) folio_ref_count(folio)); folio_end_read(folio, true); - ctx->ring_pages[i] = &folio->page; + ctx->ring_folios[i] = folio; } ctx->nr_pages = i; @@ -573,7 +573,7 @@ static int aio_setup_ring(struct kioctx *ctx, unsigned int nr_events) ctx->user_id = ctx->mmap_base; ctx->nr_events = nr_events; /* trusted copy */ - ring = page_address(ctx->ring_pages[0]); + ring = folio_address(ctx->ring_folios[0]); ring->nr = nr_events; /* user copy */ ring->id = ~0U; ring->head = ring->tail = 0; @@ -581,7 +581,7 @@ static int aio_setup_ring(struct kioctx *ctx, unsigned int nr_events) ring->compat_features = AIO_RING_COMPAT_FEATURES; ring->incompat_features = AIO_RING_INCOMPAT_FEATURES; ring->header_length = sizeof(struct aio_ring); - flush_dcache_page(ctx->ring_pages[0]); + flush_dcache_folio(ctx->ring_folios[0]); return 0; } @@ -692,9 +692,9 @@ static int ioctx_add_table(struct kioctx *ctx, struct mm_struct *mm) /* While kioctx setup is in progress, * we are protected from page migration - * changes ring_pages by ->ring_lock. + * changes ring_folios by ->ring_lock. */ - ring = page_address(ctx->ring_pages[0]); + ring = folio_address(ctx->ring_folios[0]); ring->id = ctx->id; return 0; } @@ -1036,7 +1036,7 @@ static void user_refill_reqs_available(struct kioctx *ctx) * against ctx->completed_events below will make sure we do the * safe/right thing. */ - ring = page_address(ctx->ring_pages[0]); + ring = folio_address(ctx->ring_folios[0]); head = ring->head; refill_reqs_available(ctx, head, ctx->tail); @@ -1148,12 +1148,12 @@ static void aio_complete(struct aio_kiocb *iocb) if (++tail >= ctx->nr_events) tail = 0; - ev_page = page_address(ctx->ring_pages[pos / AIO_EVENTS_PER_PAGE]); + ev_page = folio_address(ctx->ring_folios[pos / AIO_EVENTS_PER_PAGE]); event = ev_page + pos % AIO_EVENTS_PER_PAGE; *event = iocb->ki_res; - flush_dcache_page(ctx->ring_pages[pos / AIO_EVENTS_PER_PAGE]); + flush_dcache_folio(ctx->ring_folios[pos / AIO_EVENTS_PER_PAGE]); pr_debug("%p[%u]: %p: %p %Lx %Lx %Lx\n", ctx, tail, iocb, (void __user *)(unsigned long)iocb->ki_res.obj, @@ -1166,10 +1166,10 @@ static void aio_complete(struct aio_kiocb *iocb) ctx->tail = tail; - ring = page_address(ctx->ring_pages[0]); + ring = folio_address(ctx->ring_folios[0]); head = ring->head; ring->tail = tail; - flush_dcache_page(ctx->ring_pages[0]); + flush_dcache_folio(ctx->ring_folios[0]); ctx->completed_events++; if (ctx->completed_events > 1) @@ -1241,8 +1241,8 @@ static long aio_read_events_ring(struct kioctx *ctx, sched_annotate_sleep(); mutex_lock(&ctx->ring_lock); - /* Access to ->ring_pages here is protected by ctx->ring_lock. */ - ring = page_address(ctx->ring_pages[0]); + /* Access to ->ring_folios here is protected by ctx->ring_lock. */ + ring = folio_address(ctx->ring_folios[0]); head = ring->head; tail = ring->tail; @@ -1263,20 +1263,20 @@ static long aio_read_events_ring(struct kioctx *ctx, while (ret < nr) { long avail; struct io_event *ev; - struct page *page; + struct folio *folio; avail = (head <= tail ? tail : ctx->nr_events) - head; if (head == tail) break; pos = head + AIO_EVENTS_OFFSET; - page = ctx->ring_pages[pos / AIO_EVENTS_PER_PAGE]; + folio = ctx->ring_folios[pos / AIO_EVENTS_PER_PAGE]; pos %= AIO_EVENTS_PER_PAGE; avail = min(avail, nr - ret); avail = min_t(long, avail, AIO_EVENTS_PER_PAGE - pos); - ev = page_address(page); + ev = folio_address(folio); copy_ret = copy_to_user(event + ret, ev + pos, sizeof(*ev) * avail); @@ -1290,9 +1290,9 @@ static long aio_read_events_ring(struct kioctx *ctx, head %= ctx->nr_events; } - ring = page_address(ctx->ring_pages[0]); + ring = folio_address(ctx->ring_folios[0]); ring->head = head; - flush_dcache_page(ctx->ring_pages[0]); + flush_dcache_folio(ctx->ring_folios[0]); pr_debug("%li h%u t%u\n", ret, head, tail); out: