From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 E55924825B8 for ; Tue, 13 Oct 2026 04:32:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791865962; cv=none; b=TCipdarR0gCDEGsdx+88vvKMwXrqbvRtB+IaP7BcoiefcxZydw7y/nWvcHSmD7R28qEyg5ISreLnBekHL1kJx5YNOfddQ9xnoa/L7TB2oa7oln2ioOXf5EmtF+/+GtCVpE/2Ge0H29s5L2qyDVQQszLJl4dYwosotn9BLpMzbW4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791865962; c=relaxed/simple; bh=KJTDfm92TH34lMeyj7ZyC/kWa9Ykw6ZDCQLW9UZxwRo=; h=Date:To:From:Subject:Message-Id; b=ISWiGHUaxCGkQB1WlACPKQtGMVDxqQUuTmOa/a3ojXaSaXMkKlhfMTWf8re1cpKO0VLbnKH0+sBiC23LVkV7xkQUCVA17g11yxA0UmOW6YcEEgbCWrHSUNhv81RJCxm3XxTDP2IBbKzg5yAH9T3T4cUBqSwPYdmLKMqBHU6a0Ik= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=2e12Urcq; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="2e12Urcq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BAF1F1F000FF; Tue, 13 Oct 2026 04:32:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=korg; t=1791865961; bh=JlccenGbAMNVDxCh8psA9bybY6JQ6V452Gpu9JgSmoU=; h=Date:To:From:Subject; b=2e12Urcql4l8uV8KF6oNo8UG0ip7OJV/J9y/OMZdcDSDcsNXdLQeEaXldE4OBUE+O tQwEoNyba5xqVmV9DpxBU8fbOtgD7vH3LhvrqK4DWL6YMoNtQCipMAezPsuWv7cbTR URoxLWDVDsbEtrnF3f7Vk0xgrHohNwXz1sAhy2Hk= Date: Mon, 12 Oct 2026 21:32:41 -0700 To: mm-commits@vger.kernel.org,ruirui.yang@linux.dev,rppt@kernel.org,pratyush@kernel.org,pasha.tatashin@soleen.com,baoquan.he@linux.dev,tz2294@columbia.edu,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-stable] vmcore-convert-mmap_vmcore_fault-to-use-folios.patch removed from -mm tree Message-Id: <20261013043241.BAF1F1F000FF@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: vmcore: convert mmap_vmcore_fault() to use folios has been removed from the -mm tree. Its filename was vmcore-convert-mmap_vmcore_fault-to-use-folios.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Tal Zussman Subject: vmcore: convert mmap_vmcore_fault() to use folios Date: Tue, 15 Sep 2026 19:42:15 -0400 Use a folio for the page cache page the s390 fault handler reads the old kernel's memory into. This removes four compound_head() calls and one of the last callers of find_or_create_page(). The vmcore mapping only has order-0 folios, so the logic is unchanged. Compile tested for s390. Link: https://lore.kernel.org/20260915-vmcore-fault-folio-v1-1-a0cb6278670f@columbia.edu Signed-off-by: Tal Zussman Signed-off-by: Andrew Morton Acked-by: Pratyush Yadav Cc: Baoquan He Cc: Dave Young Cc: Mike Rapoport Cc: Pasha Tatashin --- fs/proc/vmcore.c | 27 ++++++++++++++------------- 1 file changed, 14 insertions(+), 13 deletions(-) --- a/fs/proc/vmcore.c~vmcore-convert-mmap_vmcore_fault-to-use-folios +++ a/fs/proc/vmcore.c @@ -474,29 +474,30 @@ static vm_fault_t mmap_vmcore_fault(stru pgoff_t index = vmf->pgoff; struct iov_iter iter; struct kvec kvec; - struct page *page; + struct folio *folio; loff_t offset; int rc; - page = find_or_create_page(mapping, index, GFP_KERNEL); - if (!page) + folio = __filemap_get_folio(mapping, index, + FGP_LOCK | FGP_ACCESSED | FGP_CREAT, GFP_KERNEL); + if (IS_ERR(folio)) return VM_FAULT_OOM; - if (!PageUptodate(page)) { - offset = (loff_t) index << PAGE_SHIFT; - kvec.iov_base = page_address(page); - kvec.iov_len = PAGE_SIZE; - iov_iter_kvec(&iter, ITER_DEST, &kvec, 1, PAGE_SIZE); + if (!folio_test_uptodate(folio)) { + offset = folio_pos(folio); + kvec.iov_base = folio_address(folio); + kvec.iov_len = folio_size(folio); + iov_iter_kvec(&iter, ITER_DEST, &kvec, 1, folio_size(folio)); rc = __read_vmcore(&iter, &offset); if (rc < 0) { - unlock_page(page); - put_page(page); + folio_unlock(folio); + folio_put(folio); return vmf_error(rc); } - SetPageUptodate(page); + folio_mark_uptodate(folio); } - unlock_page(page); - vmf->page = page; + folio_unlock(folio); + vmf->page = folio_file_page(folio, index); return 0; #else return VM_FAULT_SIGBUS; _ Patches currently in -mm which might be from tz2294@columbia.edu are