From e72e052d56c3f05e533f4b67056f86931f688368 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" Date: Tue, 26 Mar 2024 19:43:41 -0700 Subject: [PATCH] generic: test MADV_POPULATE_READ with IO errors This is a regression test for "mm/madvise: make MADV_POPULATE_(READ|WRITE) handle VM_FAULT_RETRY properly". Cc: David Hildenbrand Signed-off-by: "Darrick J. Wong" Reviewed-by: Christoph Hellwig Reviewed-by: Zorro Lang Signed-off-by: Zorro Lang --- tests/generic/743 | 65 +++++++++++++++++++++++++++++++++++++++++++ tests/generic/743.out | 4 +++ 2 files changed, 69 insertions(+) create mode 100755 tests/generic/743 create mode 100644 tests/generic/743.out diff --git a/tests/generic/743 b/tests/generic/743 new file mode 100755 index 00000000..ad37d32f --- /dev/null +++ b/tests/generic/743 @@ -0,0 +1,65 @@ +#! /bin/bash +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2024 Oracle. All Rights Reserved. +# +# FS QA Test No. 743 +# +# This is a regression test for a kernel hang that I saw when creating a memory +# mapping, injecting EIO errors on the block device, and invoking +# MADV_POPULATE_READ on the mapping to fault in the pages. +# +. ./common/preamble +_begin_fstest auto rw eio + +# Override the default cleanup function. +_cleanup() +{ + cd / + rm -f $tmp.* + _dmerror_unmount + _dmerror_cleanup +} + +# Import common functions. +. ./common/dmerror + +_fixed_by_kernel_commit XXXXXXXXXXXX \ + "mm/madvise: make MADV_POPULATE_(READ|WRITE) handle VM_FAULT_RETRY properly" + +# real QA test starts here + +# Modify as appropriate. +_supported_fs generic +_require_xfs_io_command madvise -R +_require_scratch +_require_dm_target error +_require_command "$TIMEOUT_PROG" "timeout" + +_scratch_mkfs >> $seqres.full 2>&1 +_dmerror_init + +filesz=2m + +# Create a file that we'll read, then cycle mount to zap pagecache +_dmerror_mount +$XFS_IO_PROG -f -c "pwrite -S 0x58 0 $filesz" "$SCRATCH_MNT/a" >> $seqres.full +_dmerror_unmount +_dmerror_mount + +# Try to read the file data in a regular fashion just to prove that it works. +echo read with no errors +$TIMEOUT_PROG -s KILL 10s $XFS_IO_PROG -c "mmap -r 0 $filesz" -c "madvise -R 0 $filesz" "$SCRATCH_MNT/a" +_dmerror_unmount +_dmerror_mount + +# Load file metadata and induce EIO errors on read. Try to provoke the kernel; +# kill the process after 10s so we can clean up. +stat "$SCRATCH_MNT/a" >> $seqres.full +echo read with IO errors +_dmerror_load_error_table +$TIMEOUT_PROG -s KILL 10s $XFS_IO_PROG -c "mmap -r 0 $filesz" -c "madvise -R 0 $filesz" "$SCRATCH_MNT/a" +_dmerror_load_working_table + +# success, all done +status=0 +exit diff --git a/tests/generic/743.out b/tests/generic/743.out new file mode 100644 index 00000000..f34158cd --- /dev/null +++ b/tests/generic/743.out @@ -0,0 +1,4 @@ +QA output created by 743 +read with no errors +read with IO errors +madvise: Bad address -- 2.30.2