From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f199.google.com (mail-pl1-f199.google.com [209.85.214.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F2EE7442FD2 for ; Mon, 10 Aug 2026 19:50:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786391449; cv=none; b=ntKXK9caVG1fr6N+cCzBZBN/Ns9ihdLWhX+5EaVU7rWxbAPyyIzA3LHiEQkAmSsMfHkmkVDPGnCOB/uaELkt7LHpKh+KXILjRKpCTXlPN/0gnkSxaTSMfP1DTmmSRRN3LR+kFszz4Fco4Ld1gUF2+U5P/03u+/zGup9f7gL0mD8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786391449; c=relaxed/simple; bh=9RX6Aq76qJMqf8LtuacV4nuPpbTB3rALE9qg6WfOqT4=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=e8ApS3hWO01iCe0+ttX8yXLxWSHlw0iKaszy6+BjMw4pfUWMIvLyOq5Y1jCclo/8FG0DaH93SbD7bfQ6VRP59c8JANo7l0IGUtAMNKz/u+z8aclvogiT6+4cPegUPrIUlhN7dxeahMqvJLgPmOE8UQ46ZgcHD/KBDFqZJd5MRjY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--praan.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=t1eLhBsi; arc=none smtp.client-ip=209.85.214.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--praan.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="t1eLhBsi" Received: by mail-pl1-f199.google.com with SMTP id d9443c01a7336-2d001671a54so53337885ad.2 for ; Mon, 10 Aug 2026 12:50:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1786391447; x=1786996247; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=C2ERQlktAlPM+wEaWp5zzj9NSzqVJxPOg25/iwvVmrE=; b=t1eLhBsice/7Rq2BEYzwD/hzwue7gAKa/9gc7ggUeTr++cHbmPf4gYkyanoxjM9ggs trgscCxV+UvS7Pjv/Rfg/Lx8ljTz91gIiQjX1mm5WxRyKOY3oasRTZ4hD5gyWMG0kqIA 5Yukfq17QTRupSNfZJ4X0r0QH3tt/fS4z4y5TffEVz9vDwBZNOPvunEnTqM83oWkhJT5 v+SdDzzsBtxr2ZeDYVjz4x2tTh53aKGaqqHxhBQSrn1huogOtaH5dpv0yEFLeL+laBk1 gTxiRiCE2Z1nCEFDikUPjgSKq8hVl21tIJubRencliRm0uyNaVCk/2JsxLBIIxr62ZUI 16Aw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786391447; x=1786996247; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=C2ERQlktAlPM+wEaWp5zzj9NSzqVJxPOg25/iwvVmrE=; b=tM6NWUEdg5piYE60RQYj2Jz7spTZoUj7X8IMDPWOkmpRlhvNwxHrT5r9+h9q0jnRh9 Q0QDAeB0rqccTS50DCsBf/DnTXvq4KzBY1TiQewAugpmjiepJlYZIOAsJcLowBd0B6/b b9kRrxRUNJx6iOQphxkDOTlgEhCRY6H85np5g9trezypiayw5xScBFjTfmnM/NtUgxEf 6hi33BSI+2sFqU9TV9R6Qafdreeqlj+m6SSg+/6bv6+XvNls8639EJpX454fP0rEZEiW ve9G4Q5FamFolG+P3qx6idRHacX/6bnhsX6EdYWUpglwY11TbBE9NCi5Py0kG+3k3D3a tJdA== X-Forwarded-Encrypted: i=1; AHgh+RqS66zpfQxvP+Q1vvSptN0lF8igmuzZf3yci3+gv/Y76loxa10MLIyhfLcFEKEVoB5bV4yaTKCz96eH@vger.kernel.org X-Gm-Message-State: AOJu0YzxVjvxL9DOEVyJSb9cunAuqnYhjAy94POwXcuwTuMQgt/GiY+4 HEfRbSM52gJLcH0exPMsGoT4U/+JRXXh9ySjE4aIxq2IJWP4GqgITN47blLhNUrR1CNlEr+4cKk fCA== X-Received: from plhw6.prod.google.com ([2002:a17:903:2f46:b0:2ca:bb31:40b9]) (user=praan job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:13c7:b0:2ce:9c48:22d3 with SMTP id d9443c01a7336-2d30033718fmr51730635ad.11.1786391447250; Mon, 10 Aug 2026 12:50:47 -0700 (PDT) Date: Mon, 10 Aug 2026 19:50:36 +0000 In-Reply-To: <20260810195040.2877784-1-praan@google.com> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260810195040.2877784-1-praan@google.com> X-Mailer: git-send-email 2.55.0.679.g6767b8d81c-goog Message-ID: <20260810195040.2877784-3-praan@google.com> Subject: [PATCH v5 2/5] nfs: track number of pinned pages in nfs_page From: Pranjal Shrivastava To: linux-nfs@vger.kernel.org, Trond Myklebust , Anna Schumaker Cc: Chuck Lever , Jeff Layton , linux-kernel@vger.kernel.org, Christoph Hellwig , Logan Gunthorpe , Jason Gunthorpe , linux-pci@vger.kernel.org, linux-rdma@vger.kernel.org, Shivaji Kant , Pranjal Shrivastava Content-Type: text/plain; charset="UTF-8" Track the number of pinned pages in nfs_page to handle unpinning correctly, ensuring that only primary requests perform the final unpinning operation, preventing subrequests from incorrectly performing unpinning on behalf of their parent requests. Add wb_nr_pinned to struct nfs_page to store the count of pinned pages owned by the request. Update request creation and cleanup helpers to initialize and use wb_nr_pinned for primary requests. Use the nfs_page_array_len() helper to calculate the number of pages spanned by a request's offset and length. Signed-off-by: Pranjal Shrivastava --- fs/nfs/pagelist.c | 9 +++++++-- include/linux/nfs_page.h | 1 + 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 606b518fa204..c307daf5f68d 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -457,6 +457,8 @@ struct nfs_page *nfs_page_create_from_page(struct nfs_open_context *ctx, offset_in_page(offset), count); if (!IS_ERR(ret)) { nfs_page_assign_page(ret, page, pinned); + if (pinned) + ret->wb_nr_pinned = 1; nfs_page_group_init(ret, NULL); } nfs_put_lock_context(l_ctx); @@ -489,6 +491,9 @@ struct nfs_page *nfs_page_create_from_folio(struct nfs_open_context *ctx, ret = nfs_page_create(l_ctx, offset, folio->index, offset, count); if (!IS_ERR(ret)) { nfs_page_assign_folio(ret, folio, pinned); + if (pinned) + ret->wb_nr_pinned = nfs_page_array_len(offset_in_page(offset), + count); nfs_page_group_init(ret, NULL); } nfs_put_lock_context(l_ctx); @@ -567,14 +572,14 @@ static void nfs_clear_request(struct nfs_page *req) if (folio != NULL) { if (test_and_clear_bit(PG_PINNED, &req->wb_flags)) - unpin_user_folio(folio, 1); + unpin_user_folio(folio, req->wb_nr_pinned); else folio_put(folio); req->wb_folio = NULL; clear_bit(PG_FOLIO, &req->wb_flags); } else if (page != NULL) { if (test_and_clear_bit(PG_PINNED, &req->wb_flags)) - unpin_user_page(page); + unpin_user_pages(&page, req->wb_nr_pinned); else put_page(page); req->wb_page = NULL; diff --git a/include/linux/nfs_page.h b/include/linux/nfs_page.h index fd7aafe7cb54..080fa3e23580 100644 --- a/include/linux/nfs_page.h +++ b/include/linux/nfs_page.h @@ -59,6 +59,7 @@ struct nfs_page { struct nfs_page *wb_this_page; /* list of reqs for this page */ struct nfs_page *wb_head; /* head pointer for req list */ unsigned short wb_nio; /* Number of I/O attempts */ + unsigned int wb_nr_pinned; /* Number of pinned pages */ }; struct nfs_pgio_mirror; -- 2.55.0.679.g6767b8d81c-goog