The patch titled
writeback: fix time ordering of the per superblock dirty inode lists 4
has been removed from the -mm tree. Its filename was
writeback-fix-time-ordering-of-the-per-superblock-dirty-inode-lists-4.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: writeback: fix time ordering of the per superblock dirty inode lists 4
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
When the kupdate function has tried to write back an expired inode it will
then check to see whether some of the inode's pages are still dirty.
This can happen when the filesystem decided to not write a page for some
reason. But it does _not_ occur due to redirtyings: a redirtying will set
I_DIRTY_PAGES.
What we need to do here is to set I_DIRTY_PAGES to reflect reality and to then
put the inode onto the _head_ of s_dirty for consideration on the next kupdate
pass, in five seconds time.
Problem is, the code failed to modify the inode's timestamp when pushing the
inode onto thehead of s_dirty.
The patch:
If there are no other inodes on s_dirty then we leave the inode's timestamp
alone: it is already expired.
If there _are_ other inodes on s_dirty then we arrange for this inode to get
the same timestamp as the inode which is at the head of s_dirty, thus
preserving the s_dirty ordering. But we only need to do this if this inode
purports to have been dirtied before the one at head-of-list.
Cc: Mike Waychison <mikew@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/fs-writeback.c | 24 +++++++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)
diff -puN fs/fs-writeback.c~writeback-fix-time-ordering-of-the-per-superblock-dirty-inode-lists-4 fs/fs-writeback.c
--- a/fs/fs-writeback.c~writeback-fix-time-ordering-of-the-per-superblock-dirty-inode-lists-4
+++ a/fs/fs-writeback.c
@@ -165,6 +165,28 @@ static void redirty_tail(struct inode *i
}
/*
+ * Redirty an inode, but mark it as the very next-to-be-written inode on its
+ * superblock's dirty-inode list.
+ * We need to preserve s_dirty's reverse-time-orderedness, so we cheat by
+ * setting this inode's dirtied_when to the same value as that of the inode
+ * which is presently head-of-list, if present head-of-list is newer than this
+ * inode. (head-of-list is the least-recently-dirtied inode: the oldest one).
+ */
+static void redirty_head(struct inode *inode)
+{
+ struct super_block *sb = inode->i_sb;
+
+ if (!list_empty(&sb->s_dirty)) {
+ struct inode *head_inode;
+
+ head_inode = list_entry(sb->s_dirty.prev, struct inode, i_list);
+ if (time_after(inode->dirtied_when, head_inode->dirtied_when))
+ inode->dirtied_when = head_inode->dirtied_when;
+ }
+ list_move_tail(&inode->i_list, &sb->s_dirty);
+}
+
+/*
* Write a single inode's dirty pages and inode data out to disk.
* If `wait' is set, wait on the writeout.
*
@@ -225,7 +247,7 @@ __sync_single_inode(struct inode *inode,
* uncongested.
*/
inode->i_state |= I_DIRTY_PAGES;
- list_move_tail(&inode->i_list, &sb->s_dirty);
+ redirty_head(inode);
} else {
/*
* Otherwise fully redirty the inode so that
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
origin.patch
git-acpi.patch
git-acpi-fixup.patch
acpi-add-reboot-mechanism.patch
working-3d-dri-intel-agpko-resume-for-i815-chip.patch
git-cifs.patch
console-keyboard-events-and-accessibility.patch
first-stab-at-elantech-touchpad-driver-for-26226-testers.patch
git-kvm.patch
git-libata-all.patch
drivers-ata-libata-ehc-fix-printk-warning.patch
ide-arm-hack.patch
ucc_geth-fix-build-break-introduced-by-commit-09f75cd7bf13720738e6a196cc0107ce9a5bd5a0-checkpatch-fixes.patch
update-smc91x-driver-with-arm-versatile-board-info.patch
git-nfsd-fixup.patch
fix-build-breakage-if-sysfs-fix.patch
qla2xxx-printk-fixes.patch
advansys-depends-on-virt_to_bus.patch
sparc-support-for-new-termios.patch
git-unionfs.patch
security-convert-lsm-into-a-static-interface-fix-unionfs.patch
slab-api-remove-useless-ctor-parameter-and-reorder-parameters-vs-unionfs.patch
git-nfs-vs-git-unionfs.patch
git-watchdog-fixup.patch
git-wireless.patch
git-wireless-fixup.patch
git-x86.patch
revert-x86_64-mm-cpa-einval.patch
fix-x86_64-mm-sched-clock-share.patch
x86_64-check-and-enable-mmconfig-for-amd-family-10h-opteron.patch
memory-hotplug-make-kmem_cache_node-for-slub-on-memory-online-avoid-panic-checkpatch-fixes.patch
memory-hotplug-make-kmem_cache_node-for-slub-on-memory-online-avoid-panic-fix.patch
vmscan-give-referenced-active-and-unmapped-pages-a-second-trip-around-the-lru.patch
vm-dont-run-touch_buffer-during-buffercache-lookups.patch
capabilities-clean-up-file-capability-reading-checkpatch-fixes.patch
pm-rework-struct-platform_suspend_ops-fixup-checkpatch-fixes.patch
serial-turn-serial-console-suspend-a-boot-rather-than-compile-time-option-update.patch
revert-x86-save-registers-in-saved_context-during-suspend-and-hibernation.patch
pm-qos-infrastructure-and-interface-fix.patch
pm-qos-infrastructure-and-interface-vs-git-acpi.patch
pm-qos-infrastructure-and-interface-vs-git-acpi-2.patch
pm-qos-infrastructure-and-interface-static-initialization-with-blocking-notifiers-checkpatch-fixes.patch
deprecate-smbfs-in-favour-of-cifs.patch
add-kernel-notifierc-fix.patch
add-kernel-notifierc-fix-2-fix-3.patch
console-events-and-accessibility-fix.patch
procfs-detect-duplicate-names-fix.patch
procfs-detect-duplicate-names-fix-fix-2.patch
stop-using-dma_xxbit_mask.patch
stop-using-dma_xxbit_mask-fix.patch
kernel-printkc-concerns-about-the-console-handover.patch
ext2-avoid-rec_len-overflow-with-64kb-block-size-checkpatch-fixes.patch
sync_sb_inodes-propagate-errors.patch
intel-iommu-pci-generic-helper-function.patch
intel-iommu-iova-allocation-and-management-routines.patch
intel-iommu-intel-iommu-driver.patch
intel-iommu-iommu-floppy-workaround.patch
jbd-config_jbd_debug-cannot-create-proc-entry-fix.patch
peterz-vs-ext4-mballoc-core.patch
64-bit-i_version-afs-fixes.patch
reiserfs-fix-up-lockdep-warnings-checkpatch-fixes.patch
reiserfs-use-is_reusable-to-catch-corruption-checkpatch-fixes.patch
reiserfs-fix-usage-of-signed-ints-for-block-numbers-checkpatch-fixes.patch
reiserfs-remove-first_zero_hint-checkpatch-fixes.patch
reiserfs-ignore-on-disk-s_bmap_nr-value-checkpatch-fixes.patch
r-o-bind-mounts-elevate-write-count-during-entire-ncp_ioctl-fix.patch
slab-api-remove-useless-ctor-parameter-and-reorder-parameters-vs-revoke.patch
revoke-wire-up-i386-system-calls.patch
revoke-vs-git-block.patch
task-containersv11-basic-task-container-framework-fix.patch
task-containersv11-shared-container-subsystem-group-arrays-simplify-proc-cgroups-fix.patch
task-containersv11-shared-container-subsystem-group-arrays-include-fix.patch
add-containerstats-v3-fix.patch
pid-namespaces-dynamic-kmem-cache-allocator-for-pid-namespaces-fix.patch
pid-namespaces-define-is_global_init-and-is_container_init-fix.patch
pid-namespaces-define-is_global_init-and-is_container_init-versus-x86_64-mm-i386-show-unhandled-signals-v3.patch
lockdep-fix-mismatched-lockdep_depth-curr_chain_hash-checkpatch-fixes.patch
fs-superc-use-list_for_each_entry-instead-of-list_for_each-fix.patch
pid-namespaces-helpers-to-find-the-task-by-its-numerical-ids-fix.patch
pid-namespaces-changes-to-show-virtual-ids-to-user-use-find_task_by_pid_ns-in-places-that-operate-with-virtual-fix.patch
pid-namespaces-changes-to-show-virtual-ids-to-user-use-find_task_by_pid_ns-in-places-that-operate-with-virtual-fix-2.patch
pid-namespaces-changes-to-show-virtual-ids-to-user-use-find_task_by_pid_ns-in-places-that-operate-with-virtual-fix-3.patch
pid-namespaces-changes-to-show-virtual-ids-to-user-fix.patch
cpuset-sched_load_balance-flag-fix.patch
cpusets-decrustify-cpuset-mask-update-code-checkpatch-fixes.patch
fix-cpusets-update_cpumask-checkpatch-fixes.patch
memory-controller-memory-accounting-v7-fix.patch
memory-controller-add-per-container-lru-and-reclaim-v7-fix.patch
memory-controller-oom-handling-v7-vs-oom-killer-stuff.patch
memory-controller-add-switch-to-control-what-type-of-pages-to-limit-v7-fix-2.patch
memcontrol-move-oom-task-exclusion-to-tasklist-fix.patch
remove-bits_to_type-macro-fix.patch
use-helpers-to-obtain-task-pid-in-printks-drm-fix.patch
hotplug-cpu-migrate-a-task-within-its-cpuset-fix.patch
cpu-hotplug-avoid-hotadd-when-proper-possible_map-isnt-specified-checkpatch-fixes.patch
powerpc-lock-bitops-fix.patch
ipc-integrate-ipc_checkid-into-ipc_lock-fix.patch
ipc-integrate-ipc_checkid-into-ipc_lock-fix-2.patch
use-extended-crashkernel-command-line-on-i386.patch
ftd_sio-clean-ups-and-updates-for-new-termios-work-checkpatch-fixes.patch
hook-up-group-scheduler-with-control-groups-fix.patch
linux-kernel-markers-checkpatch-fixes.patch
linux-kernel-markers-samples-checkpatch-fixes.patch
uninline-forkc-exitc-checkpatch-fixes.patch
fuse-fix-race-between-getattr-and-write-checkpatch-fixes.patch
fuse-add-file-handle-to-getattr-operation-checkpatch-fixes.patch
sparse-pointer-use-of-zero-as-null-checkpatch-fixes.patch
i-oat-tighten-descriptor-setup-performance-fix.patch
i-oat-add-completion-callback-for-async_tx-interface-use-fix.patch
i-oat-add-completion-callback-for-async_tx-interface-use-fix-fix.patch
make-copy_from_user_inatomic-not-zero-the-tail-on-i386-vs-reiser4.patch
reiser4.patch
git-block-vs-reiser4.patch
git-nfsd-broke-reiser4.patch
slab-api-remove-useless-ctor-parameter-and-reorder-parameters-vs-reiser4.patch
page-owner-tracking-leak-detector.patch
nr_blockdev_pages-in_interrupt-warning.patch
slab-leaks3-default-y.patch
profile-likely-unlikely-macros-fix.patch
put_bh-debug.patch
kmap_atomic-debugging.patch
shrink_slab-handle-bad-shrinkers.patch
getblk-handle-2tb-devices.patch
w1-build-fix.patch
-
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
