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-rw-r--r--recipes-kernel/linux/files/0001-Revert-writeback-Fix-sync-livelock-due-to-b_dirty_ti.patch194
-rw-r--r--recipes-kernel/linux/linux-raspberrypi_5.4.bb1
2 files changed, 0 insertions, 195 deletions
diff --git a/recipes-kernel/linux/files/0001-Revert-writeback-Fix-sync-livelock-due-to-b_dirty_ti.patch b/recipes-kernel/linux/files/0001-Revert-writeback-Fix-sync-livelock-due-to-b_dirty_ti.patch
deleted file mode 100644
index 70c14ab..0000000
--- a/recipes-kernel/linux/files/0001-Revert-writeback-Fix-sync-livelock-due-to-b_dirty_ti.patch
+++ /dev/null
@@ -1,194 +0,0 @@
1From a9d72cb8d30eb0ab0175e9b055f0a1a19a8142b0 Mon Sep 17 00:00:00 2001
2From: Martin Jansa <Martin.Jansa@gmail.com>
3Date: Mon, 14 Sep 2020 16:24:07 +0200
4Subject: [PATCH] Revert "writeback: Fix sync livelock due to b_dirty_time
5 processing"
6
7This reverts commit 6623c19042b63018230e9468ac16cd1be01abaa3.
8
9* fixes:
10 lttng-modules/2.12.2-r0/lttng-modules-2.12.2/probes/../probes/lttng-tracepoint-event-impl.h:131:6: error: conflicting types for 'trace_writeback_queue_io'
11
12* The issue is that writeback_queue_io was updated in lttng-modules in:
13 https://github.com/lttng/lttng-modules/commit/817e02f9e256b8f2cbb9e3125eb061757b83bd4a
14 which isn't included in 2.12.2 version currently in oe-core and even if it is, then it
15 checks for kernel version 5.9 and won't work with this commit backported from 5.9 to rpi-5.4.y.
16 at least until this lttng-modules commit which improves the LINUX_VERSION_CODE check to
17 include LTTNG_KERNEL_RANGE(5,4,62, 5,5,0)
18 https://github.com/lttng/lttng-modules/commit/b6af46d166c48c9e59600a60b5a2a7ead10f179a
19
20Upstream-Status: Pending
21Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
22
23---
24 fs/fs-writeback.c | 44 ++++++++++++++++++++------------
25 include/trace/events/writeback.h | 13 +++++-----
26 2 files changed, 34 insertions(+), 23 deletions(-)
27
28diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
29index 5f6400ba82c0..51f87b673084 100644
30--- a/fs/fs-writeback.c
31+++ b/fs/fs-writeback.c
32@@ -42,6 +42,7 @@
33 struct wb_writeback_work {
34 long nr_pages;
35 struct super_block *sb;
36+ unsigned long *older_than_this;
37 enum writeback_sync_modes sync_mode;
38 unsigned int tagged_writepages:1;
39 unsigned int for_kupdate:1;
40@@ -1233,13 +1234,16 @@ static bool inode_dirtied_after(struct inode *inode, unsigned long t)
41 #define EXPIRE_DIRTY_ATIME 0x0001
42
43 /*
44- * Move expired (dirtied before dirtied_before) dirty inodes from
45+ * Move expired (dirtied before work->older_than_this) dirty inodes from
46 * @delaying_queue to @dispatch_queue.
47 */
48 static int move_expired_inodes(struct list_head *delaying_queue,
49 struct list_head *dispatch_queue,
50- int flags, unsigned long dirtied_before)
51+ int flags,
52+ struct wb_writeback_work *work)
53 {
54+ unsigned long *older_than_this = NULL;
55+ unsigned long expire_time;
56 LIST_HEAD(tmp);
57 struct list_head *pos, *node;
58 struct super_block *sb = NULL;
59@@ -1247,9 +1251,16 @@ static int move_expired_inodes(struct list_head *delaying_queue,
60 int do_sb_sort = 0;
61 int moved = 0;
62
63+ if ((flags & EXPIRE_DIRTY_ATIME) == 0)
64+ older_than_this = work->older_than_this;
65+ else if (!work->for_sync) {
66+ expire_time = jiffies - (dirtytime_expire_interval * HZ);
67+ older_than_this = &expire_time;
68+ }
69 while (!list_empty(delaying_queue)) {
70 inode = wb_inode(delaying_queue->prev);
71- if (inode_dirtied_after(inode, dirtied_before))
72+ if (older_than_this &&
73+ inode_dirtied_after(inode, *older_than_this))
74 break;
75 list_move(&inode->i_io_list, &tmp);
76 moved++;
77@@ -1295,22 +1306,18 @@ static int move_expired_inodes(struct list_head *delaying_queue,
78 * |
79 * +--> dequeue for IO
80 */
81-static void queue_io(struct bdi_writeback *wb, struct wb_writeback_work *work,
82- unsigned long dirtied_before)
83+static void queue_io(struct bdi_writeback *wb, struct wb_writeback_work *work)
84 {
85 int moved;
86- unsigned long time_expire_jif = dirtied_before;
87
88 assert_spin_locked(&wb->list_lock);
89 list_splice_init(&wb->b_more_io, &wb->b_io);
90- moved = move_expired_inodes(&wb->b_dirty, &wb->b_io, 0, dirtied_before);
91- if (!work->for_sync)
92- time_expire_jif = jiffies - dirtytime_expire_interval * HZ;
93+ moved = move_expired_inodes(&wb->b_dirty, &wb->b_io, 0, work);
94 moved += move_expired_inodes(&wb->b_dirty_time, &wb->b_io,
95- EXPIRE_DIRTY_ATIME, time_expire_jif);
96+ EXPIRE_DIRTY_ATIME, work);
97 if (moved)
98 wb_io_lists_populated(wb);
99- trace_writeback_queue_io(wb, work, dirtied_before, moved);
100+ trace_writeback_queue_io(wb, work, moved);
101 }
102
103 static int write_inode(struct inode *inode, struct writeback_control *wbc)
104@@ -1822,7 +1829,7 @@ static long writeback_inodes_wb(struct bdi_writeback *wb, long nr_pages,
105 blk_start_plug(&plug);
106 spin_lock(&wb->list_lock);
107 if (list_empty(&wb->b_io))
108- queue_io(wb, &work, jiffies);
109+ queue_io(wb, &work);
110 __writeback_inodes_wb(wb, &work);
111 spin_unlock(&wb->list_lock);
112 blk_finish_plug(&plug);
113@@ -1842,7 +1849,7 @@ static long writeback_inodes_wb(struct bdi_writeback *wb, long nr_pages,
114 * takes longer than a dirty_writeback_interval interval, then leave a
115 * one-second gap.
116 *
117- * dirtied_before takes precedence over nr_to_write. So we'll only write back
118+ * older_than_this takes precedence over nr_to_write. So we'll only write back
119 * all dirty pages if they are all attached to "old" mappings.
120 */
121 static long wb_writeback(struct bdi_writeback *wb,
122@@ -1850,11 +1857,14 @@ static long wb_writeback(struct bdi_writeback *wb,
123 {
124 unsigned long wb_start = jiffies;
125 long nr_pages = work->nr_pages;
126- unsigned long dirtied_before = jiffies;
127+ unsigned long oldest_jif;
128 struct inode *inode;
129 long progress;
130 struct blk_plug plug;
131
132+ oldest_jif = jiffies;
133+ work->older_than_this = &oldest_jif;
134+
135 blk_start_plug(&plug);
136 spin_lock(&wb->list_lock);
137 for (;;) {
138@@ -1888,14 +1898,14 @@ static long wb_writeback(struct bdi_writeback *wb,
139 * safe.
140 */
141 if (work->for_kupdate) {
142- dirtied_before = jiffies -
143+ oldest_jif = jiffies -
144 msecs_to_jiffies(dirty_expire_interval * 10);
145 } else if (work->for_background)
146- dirtied_before = jiffies;
147+ oldest_jif = jiffies;
148
149 trace_writeback_start(wb, work);
150 if (list_empty(&wb->b_io))
151- queue_io(wb, work, dirtied_before);
152+ queue_io(wb, work);
153 if (work->sb)
154 progress = writeback_sb_inodes(work->sb, wb, work);
155 else
156diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
157index 67434278b81d..66282552db20 100644
158--- a/include/trace/events/writeback.h
159+++ b/include/trace/events/writeback.h
160@@ -499,9 +499,8 @@ DEFINE_WBC_EVENT(wbc_writepage);
161 TRACE_EVENT(writeback_queue_io,
162 TP_PROTO(struct bdi_writeback *wb,
163 struct wb_writeback_work *work,
164- unsigned long dirtied_before,
165 int moved),
166- TP_ARGS(wb, work, dirtied_before, moved),
167+ TP_ARGS(wb, work, moved),
168 TP_STRUCT__entry(
169 __array(char, name, 32)
170 __field(unsigned long, older)
171@@ -511,17 +510,19 @@ TRACE_EVENT(writeback_queue_io,
172 __field(unsigned int, cgroup_ino)
173 ),
174 TP_fast_assign(
175+ unsigned long *older_than_this = work->older_than_this;
176 strscpy_pad(__entry->name, bdi_dev_name(wb->bdi), 32);
177- __entry->older = dirtied_before;
178- __entry->age = (jiffies - dirtied_before) * 1000 / HZ;
179+ __entry->older = older_than_this ? *older_than_this : 0;
180+ __entry->age = older_than_this ?
181+ (jiffies - *older_than_this) * 1000 / HZ : -1;
182 __entry->moved = moved;
183 __entry->reason = work->reason;
184 __entry->cgroup_ino = __trace_wb_assign_cgroup(wb);
185 ),
186 TP_printk("bdi %s: older=%lu age=%ld enqueue=%d reason=%s cgroup_ino=%u",
187 __entry->name,
188- __entry->older, /* dirtied_before in jiffies */
189- __entry->age, /* dirtied_before in relative milliseconds */
190+ __entry->older, /* older_than_this in jiffies */
191+ __entry->age, /* older_than_this in relative milliseconds */
192 __entry->moved,
193 __print_symbolic(__entry->reason, WB_WORK_REASON),
194 __entry->cgroup_ino
diff --git a/recipes-kernel/linux/linux-raspberrypi_5.4.bb b/recipes-kernel/linux/linux-raspberrypi_5.4.bb
index ac2aeab..594694c 100644
--- a/recipes-kernel/linux/linux-raspberrypi_5.4.bb
+++ b/recipes-kernel/linux/linux-raspberrypi_5.4.bb
@@ -8,7 +8,6 @@ require linux-raspberrypi_5.4.inc
8SRC_URI += "file://0001-Revert-selftests-bpf-Skip-perf-hw-events-test-if-the.patch \ 8SRC_URI += "file://0001-Revert-selftests-bpf-Skip-perf-hw-events-test-if-the.patch \
9 file://0002-Revert-selftests-bpf-Fix-perf_buffer-test-on-systems.patch \ 9 file://0002-Revert-selftests-bpf-Fix-perf_buffer-test-on-systems.patch \
10 file://0001-perf-cs-etm-Move-definition-of-traceid_list-global-v.patch \ 10 file://0001-perf-cs-etm-Move-definition-of-traceid_list-global-v.patch \
11 file://0001-Revert-writeback-Fix-sync-livelock-due-to-b_dirty_ti.patch \
12 file://powersave.cfg \ 11 file://powersave.cfg \
13 file://android-drivers.cfg \ 12 file://android-drivers.cfg \
14 " 13 "
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2025-11-29 15:37:23 +0000