From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 0745A267AFD for ; Wed, 30 Apr 2025 18:58:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746039489; cv=none; b=hvus7FkW9jwjCsKAMd7sC0cYr1VDQeZG+V6Y4y7HFuC3gZBqO8Zp20FA+FOU9YC0gIeCqKH3s8pRUuhS3nZ/csng1NZ+5esqhlD8BrgqrkPccKUIL5w3eE/9uMQ9JGsgnKikUCcaln90zL7sM/rt84ITUeRT6mD8i3AJSZid0rk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746039489; c=relaxed/simple; bh=zRLCEvvjv9vup53c4cK8xs21IWEVFMC0hL+JofSxVeY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=pUI/vOMiSpL90MCU70Uvx5dk2/MffpTAnB/AEetg+W4RA7xl9TQtZf9gljndPAq6ewUhhTc0viMYFJJSfW9h3OIN0M6yzy+AOPJHw0W1UpUSeZE8ezy9WV1Z/5jRBI8g11HYpHmSre2R0nLJ17XFflxikjRf/J9jKsY7O0J+QKs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=JbHmoY6A; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="JbHmoY6A" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1746039486; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=mftKe7707T/GtWSLagWhYlnulUJle86ihYZ8NU5oWfc=; b=JbHmoY6AfZCR+Ip+8PEEMdllnhu6bRLlHYCChVhJZ4JRHk2LmnJwxrOdVvqAgPm8ozrFWa BxPvqObvLujqsVmYy8uEqBMFaWd0Avn0SjfS+PkTfz2Ucb/D3RsPSUfrRwuDTnyVTgR7sp KYbzW2cp1F55uN0+qW1lOuS+Q7IL2/I= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-639-r-w3luzHMMm8jI5Yqzftog-1; Wed, 30 Apr 2025 14:58:01 -0400 X-MC-Unique: r-w3luzHMMm8jI5Yqzftog-1 X-Mimecast-MFC-AGG-ID: r-w3luzHMMm8jI5Yqzftog_1746039481 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id BCE3A1956088; Wed, 30 Apr 2025 18:58:00 +0000 (UTC) Received: from bfoster.redhat.com (unknown [10.22.64.112]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 290B219560A3; Wed, 30 Apr 2025 18:58:00 +0000 (UTC) From: Brian Foster To: linux-fsdevel@vger.kernel.org Cc: linux-xfs@vger.kernel.org Subject: [PATCH 1/6] iomap: resample iter->pos after iomap_write_begin() calls Date: Wed, 30 Apr 2025 15:01:07 -0400 Message-ID: <20250430190112.690800-2-bfoster@redhat.com> In-Reply-To: <20250430190112.690800-1-bfoster@redhat.com> References: <20250430190112.690800-1-bfoster@redhat.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 In preparation for removing the pos parameter, push the local pos assignment down after calls to iomap_write_begin(). Signed-off-by: Brian Foster --- fs/iomap/buffered-io.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 5b08bd417b28..a41c8ffc4996 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -920,11 +920,11 @@ static int iomap_write_iter(struct iomap_iter *iter, struct iov_iter *i) size_t bytes; /* Bytes to write to folio */ size_t copied; /* Bytes copied from user */ u64 written; /* Bytes have been written */ - loff_t pos = iter->pos; + loff_t pos; bytes = iov_iter_count(i); retry: - offset = pos & (chunk - 1); + offset = iter->pos & (chunk - 1); bytes = min(chunk - offset, bytes); status = balance_dirty_pages_ratelimited_flags(mapping, bdp_flags); @@ -949,13 +949,14 @@ static int iomap_write_iter(struct iomap_iter *iter, struct iov_iter *i) break; } - status = iomap_write_begin(iter, pos, bytes, &folio); + status = iomap_write_begin(iter, iter->pos, bytes, &folio); if (unlikely(status)) { - iomap_write_failed(iter->inode, pos, bytes); + iomap_write_failed(iter->inode, iter->pos, bytes); break; } if (iter->iomap.flags & IOMAP_F_STALE) break; + pos = iter->pos; offset = offset_in_folio(folio, pos); if (bytes > folio_size(folio) - offset) @@ -1276,15 +1277,16 @@ static int iomap_unshare_iter(struct iomap_iter *iter) do { struct folio *folio; size_t offset; - loff_t pos = iter->pos; + loff_t pos; bool ret; bytes = min_t(u64, SIZE_MAX, bytes); - status = iomap_write_begin(iter, pos, bytes, &folio); + status = iomap_write_begin(iter, iter->pos, bytes, &folio); if (unlikely(status)) return status; if (iomap->flags & IOMAP_F_STALE) break; + pos = iter->pos; offset = offset_in_folio(folio, pos); if (bytes > folio_size(folio) - offset) @@ -1351,15 +1353,16 @@ static int iomap_zero_iter(struct iomap_iter *iter, bool *did_zero) do { struct folio *folio; size_t offset; - loff_t pos = iter->pos; + loff_t pos; bool ret; bytes = min_t(u64, SIZE_MAX, bytes); - status = iomap_write_begin(iter, pos, bytes, &folio); + status = iomap_write_begin(iter, iter->pos, bytes, &folio); if (status) return status; if (iter->iomap.flags & IOMAP_F_STALE) break; + pos = iter->pos; /* warn about zeroing folios beyond eof that won't write back */ WARN_ON_ONCE(folio_pos(folio) > iter->inode->i_size); -- 2.49.0