eal error or not. We don't
--
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--
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test devid 1 transid 29 /dev/sdb
+[ 1505.952977] btrfs: disk space caching is enabled
+[ 1506.069678] vfs: turning on hot data tracking
+
+2.) Mount debugfs at first:
+
+$ mount -t debugfs none /sys/kernel/debug
+$ ls -l /sys/kernel/debug/hot_track/
+total 0
+drwxr-xr-x 2 root root 0 Aug 8 04:40 sdb
+$
queue_struct *update_wq;
struct delayed_work update_work;
struct hot_func_type *hot_func_type;
+ struct shrinker hot_shrink;
};
extern void __init hot_cache_init(void);
--
1.7.6.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a
-
include/linux/hot_tracking.h |7 +++
kernel/sysctl.c | 14 ++
4 files changed, 30 insertions(+), 12 deletions(-)
diff --git a/fs/hot_tracking.c b/fs/hot_tracking.c
index 376d7fb..02ac4a2 100644
--- a/fs/hot_tracking.c
+++ b/fs/hot_tracking.c
@@ -28,6 +28,12
+ error = hot_track_init(sb);
+ if (error)
+ goto out_free_root;
+ }
+
return 0;
+ out_free_root:
+ dput(sb->s_root);
+ sb->s_root = NULL;
out_syncd_stop:
xfs_syncd_stop(mp);
out_filestream_unmount:
--
1.7.6.5
--
To unsubsc
From: Zhi Yong Wu
Add a /sys/kernel/debug/hot_track// directory for each
volume that contains two files. The first, `inode_stats', contains the
heat information for inodes that have been brought into the hot data map
structures. The second, `range_stats', contains similar information
workqueue_struct *update_wq;
+ struct delayed_work update_work;
};
extern void __init hot_cache_init(void);
--
1.7.6.5
--
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ME_TO_KICK 300
+
/* NRR/NRW heat unit = 2^X accesses */
#define NRR_MULTIPLIER_POWER 20 /* NRR - number of reads since mount */
#define NRR_COEFF_POWER 0
--
1.7.6.5
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(u64)nr_pages * PAGE_CACHE_SIZE, 0);
+
return ret;
}
--
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--
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_inode_tree;
+ spinlock_t lock; /*protect inode tree */
+};
+
+extern void __init hot_cache_init(void);
+
+#endif /* _LINUX_HOTTRACK_H */
--
1.7.6.5
--
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init(void);
+extern int hot_track_init(struct super_block *sb);
+extern void hot_track_exit(struct super_block *sb);
+extern void hot_inode_item_put(struct hot_inode_item *he);
#endif /* _LINUX_HOTTRACK_H */
--
1.7.6.5
--
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ock *sb);
extern void hot_track_exit(struct super_block *sb);
extern void hot_inode_item_put(struct hot_inode_item *he);
+extern void hot_update_freqs(struct inode *inode, loff_t start,
+ size_t len, int rw);
+extern struct hot_inode_item *hot_inode_item_lookup(struct hot_info *root,
+
e map info.
*/
static void hot_map_init(struct hot_info *root)
--
1.7.6.5
--
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lock; /*protect inode tree */
+
+ /* map of inode temperature */
+ struct hot_map_head heat_inode_map[HEAT_MAP_SIZE];
+ /* map of range temperature */
+ struct hot_map_head heat_range_map[HEAT_MAP_SIZE];
+ unsigned int hot_map_nr;
};
extern void __init hot_cache_init(vo
+
extern void __init hot_cache_init(void);
extern int hot_track_init(struct super_block *sb);
extern void hot_track_exit(struct super_block *sb);
--
1.7.6.5
--
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_struct *update_wq;
struct delayed_work update_work;
struct hot_type *hot_type;
+ struct shrinker hot_shrink;
};
extern void __init hot_cache_init(void);
--
1.7.6.5
--
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the body of a message to majord..
seq_puts(seq, ",skip_balance");
if (btrfs_test_opt(root, PANIC_ON_FATAL_ERROR))
seq_puts(seq, ",fatal_errors=panic");
+ if (btrfs_test_opt(root, HOT_TRACK))
+ seq_puts(seq, ",hot_track");
return 0;
}
--
1.7.6.5
--
To unsubscrib
}
+ sbi->s_hottrack_enable = 1;
} else if (token == Opt_stripe) {
sbi->s_stripe = arg;
} else if (m->flags & MOPT_DATAJ) {
--
1.7.6.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kerne
From: Zhi Yong Wu
HI, guys,
Any comments or ideas are appreciated, thanks.
NOTE:
The patchset can be obtained via my kernel dev git on github:
g...@github.com:wuzhy/kernel.git hot_tracking
If you're interested, you can also review them via
https://github.com/wuzhy/kernel/commits
test devid 1 transid 29 /dev/sdb
+[ 1505.952977] btrfs: disk space caching is enabled
+[ 1506.069678] vfs: turning on hot data tracking
+
+2.) Mount debugfs at first:
+
+$ mount -t debugfs none /sys/kernel/debug
+$ ls -l /sys/kernel/debug/hot_track/
+total 0
+drwxr-xr-x 2 root root 0 Aug 8 04:40 sdb
+$
+ error = hot_track_init(sb);
+ if (error)
+ goto out_free_root;
+ }
+
return 0;
+ out_free_root:
+ dput(sb->s_root);
+ sb->s_root = NULL;
out_syncd_stop:
xfs_syncd_stop(mp);
out_filestream_unmount:
--
1.7.6.5
--
To unsubsc
-
include/linux/hot_tracking.h |7 +++
kernel/sysctl.c | 14 ++
4 files changed, 30 insertions(+), 12 deletions(-)
diff --git a/fs/hot_tracking.c b/fs/hot_tracking.c
index db430e8..2e5bf6c 100644
--- a/fs/hot_tracking.c
+++ b/fs/hot_tracking.c
@@ -27,6 +27,12
From: Zhi Yong Wu
Add a /sys/kernel/debug/hot_track// directory for each
volume that contains two files. The first, `inode_stats', contains the
heat information for inodes that have been brought into the hot data map
structures. The second, `range_stats', contains similar information
uct *update_wq;
+ struct delayed_work update_work;
};
extern void __init hot_cache_init(void);
--
1.7.6.5
--
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an hot type */
+struct hot_type {
+ u64 range_bits;
+ /* fields provided by specific FS */
+ struct hot_func_ops ops;
+};
+
struct hot_info {
struct radix_tree_root hot_inode_tree;
spinlock_t lock; /*protect inode tree */
@@ -85,6 +103,7 @@ struct hot_info {
nds)
+ */
+#define TIME_TO_KICK 300
+
/* NRR/NRW heat unit = 2^X accesses */
#define NRR_MULTIPLIER_POWER 20 /* NRR - number of reads since mount */
#define NRR_COEFF_POWER 0
--
1.7.6.5
--
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the body o
elta between recent reads(ns) */
+#define AVR_COEFF_POWER 0
+#define AVW_DIVIDER_POWER 40 /* AVW - average delta between recent writes(ns)
*/
+#define AVW_COEFF_POWER 0
+
#endif /* __HOT_TRACKING__ */
--
1.7.6.5
--
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E_CACHE_SIZE, 0);
+
return ret;
}
--
1.7.6.5
--
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/
+};
+
+struct hot_info {
+ struct radix_tree_root hot_inode_tree;
+ spinlock_t lock; /*protect inode tree */
+};
+
+extern void __init hot_cache_init(void);
+
+#endif /* _LINUX_HOTTRACK_H */
--
1.7.6.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
.
Usage syntax:
root@debian-i386:~# mount -o hottrack /dev/sdb /mnt
[ 1505.894078] device label test devid 1 transid 29 /dev/sdb
[ 1505.952977] btrfs: disk space caching is enabled
[ 1506.069678] vfs: turning on hot data tracking
root@debian-i386:~# mount -t debugfs none /sys/kernel/debug
root@deb
cribe from this list: send the line "unsubscribe linux-kernel" in
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ts hot_freq_data, start, len, and in_tree */
+ spinlock_t lock;
+ /* prevents kfree */
+ struct kref refs;
+};
+
struct hot_info {
/* red-black tree that keeps track of fs-wide hot data */
--
1.7.6.5
--
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_range_item
+*hot_rb_lookup_hot_range_item(struct hot_range_tree *tree,
+ u64 start);
+
+struct hot_inode_item
+*hot_rb_lookup_hot_inode_item(struct hot_inode_tree *tree,
+ unsigned long inode_num);
+
+void hot_rb_free_hot_inode_item(struct h
struct rb_root map;
@@ -89,6 +94,7 @@ struct hot_range_item {
};
struct hot_info {
+ unsigned long mount_opt;
/* red-black tree that keeps track of fs-wide hot data */
struct hot_inode_tree hot_inode_tree;
--
1.7.6.5
--
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hot_track_exit(sb);
+
dput(root);
deactivate_locked_super(sb);
out_free_secdata:
--
1.7.6.5
--
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te_freqs(mapping->host, start,
+ (u64)nr_pages * PAGE_CACHE_SIZE, 0);
+ }
+
return ret;
}
--
1.7.6.5
--
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From: Zhi Yong Wu
Fork and run one kernel kthread to calculate
that temperature based on some metrics kept
in custom frequency data structs, and store
the info in the hash table.
Signed-off-by: Zhi Yong Wu
---
fs/hot_hash.c | 302
u32 last_temperature;
};
+struct heat_info {
+ __u64 avg_delta_reads;
+ __u64 avg_delta_writes;
+ __u64 last_read_time;
+ __u64 last_write_time;
+ __u32 num_reads;
+ __u32 num_writes;
+ __u32 temperature;
+ __u8 live;
+ char filename[PATH_MAX
From: Zhi Yong Wu
Add a /sys/kernel/debug/hot_track// directory for each
volume that contains two files. The first, `inode_data', contains the
heat information for inodes that have been brought into the hot data map
structures. The second, `range_data', contains similar information for
subfile
ap of inode temperature */
+ struct hot_hash_head heat_inode_hl[HEAT_HASH_SIZE];
+
+ /* hash map of range temperature */
+ struct hot_hash_head heat_range_hl[HEAT_HASH_SIZE];
};
#endif /* _LINUX_HOTTRACK_H */
--
1.7.6.5
--
To unsubscribe from this list: send the line "
_LINUX_HOTTRACK_H
+#define _LINUX_HOTTRACK_H
+
+#include
+#include
+#include
+
+struct hot_info {
+};
+
+#endif /* _LINUX_HOTTRACK_H */
--
1.7.6.5
--
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the body of a message to majord...@vger.kernel.org
More majo
are appreciated, thanks.
NOTE:
The patchset can be obtained via my kernel dev git on github:
git://github.com/wuzhy/kernel.git hot_tracking
If you're interested, you can also review them via
https://github.com/wuzhy/kernel/commits/hot_tracking
For more info, please check hot_tracking.txt
ge_tree */
+ size_t len; /* length in bytes */
+};
+
+struct hot_info {
+ struct hot_rb_tree hot_inode_tree;
+ spinlock_t lock; /*protect inode tree */
+};
+
+extern void __init hot_cache_init(void);
+
+#endif /* _LINUX_HOTTRACK_H */
--
1.7.6.5
--
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* PAGE_CACHE_SIZE, 0);
+
return ret;
}
--
1.7.6.5
--
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the body of a message to majord...@vger.kernel.org
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t_tracking.h
@@ -74,5 +74,8 @@ struct hot_info {
};
extern void __init hot_cache_init(void);
+extern int hot_track_init(struct super_block *sb);
+extern void hot_track_exit(struct super_block *sb);
+extern void hot_inode_item_put(struct hot_inode_item *he);
#endif /* _LINUX_HOTTRACK_H */
--
(struct super_block *sb);
extern void hot_track_exit(struct super_block *sb);
extern void hot_inode_item_put(struct hot_inode_item *he);
+extern void hot_update_freqs(struct inode *inode, loff_t start,
+ size_t len, int rw);
+extern struct hot_inode_item *hot_in
de/linux/hot_tracking.h
+++ b/include/linux/hot_tracking.h
@@ -110,6 +110,7 @@ struct hot_info {
struct workqueue_struct *update_wq;
struct delayed_work update_work;
struct hot_type *hot_type;
+ struct shrinker hot_shrink;
};
extern void __init hot_cache_init(void);
-
seq_puts(seq, ",skip_balance");
if (btrfs_test_opt(root, PANIC_ON_FATAL_ERROR))
seq_puts(seq, ",fatal_errors=panic");
+ if (btrfs_test_opt(root, HOT_TRACK))
+ seq_puts(seq, ",hot_track");
return 0;
}
--
1.7.6.5
--
To unsubscrib
+
extern void __init hot_cache_init(void);
extern int hot_track_init(struct super_block *sb);
extern void hot_track_exit(struct super_block *sb);
--
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--
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_bucket->node_list);
+ root->hot_map_nr++;
+ freq_data->last_temp = temp;
+ }
+ spin_unlock(>hot_range.lock);
+ }
+}
+
+/*
* Initialize inode and range map info.
*/
static void hot_map_init(struct hot_info *root)
--
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test devid 1 transid 29 /dev/sdb
+[ 1505.952977] btrfs: disk space caching is enabled
+[ 1506.069678] vfs: turning on hot data tracking
+
+2.) Mount debugfs at first:
+
+$ mount -t debugfs none /sys/kernel/debug
+$ ls -l /sys/kernel/debug/hot_track/
+total 0
+drwxr-xr-x 2 root root 0 Aug 8 04:40 sdb
+$
-
include/linux/hot_tracking.h |7 +++
kernel/sysctl.c | 14 ++
4 files changed, 30 insertions(+), 12 deletions(-)
diff --git a/fs/hot_tracking.c b/fs/hot_tracking.c
index 94fe029..74d01da 100644
--- a/fs/hot_tracking.c
+++ b/fs/hot_tracking.c
@@ -27,6 +27,12
From: Zhi Yong Wu
Add a /sys/kernel/debug/hot_track// directory for each
volume that contains two files. The first, `inode_stats', contains the
heat information for inodes that have been brought into the hot data map
structures. The second, `range_stats', contains similar information
e_map[HEAT_MAP_SIZE];
unsigned int hot_map_nr;
+
+ struct workqueue_struct *update_wq;
+ struct delayed_work update_work;
};
extern void __init hot_cache_init(void);
--
1.7.6.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body
ided by specific FS */
+ struct hot_func_ops ops;
+};
+
struct hot_info {
struct hot_rb_tree hot_inode_tree;
spinlock_t lock; /*protect inode tree */
@@ -91,6 +109,7 @@ struct hot_info {
struct workqueue_struct *update_wq;
struct delayed_work update_work;
= 2^X accesses */
#define NRR_MULTIPLIER_POWER 20 /* NRR - number of reads since mount */
#define NRR_COEFF_POWER 0
--
1.7.6.5
--
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nlock_t lock; /*protect inode tree */
+
+ /* map of inode temperature */
+ struct hot_map_head heat_inode_map[HEAT_MAP_SIZE];
+ /* map of range temperature */
+ struct hot_map_head heat_range_map[HEAT_MAP_SIZE];
+ unsigned int hot_map_nr;
};
extern void __init hot_cache
| ipoib | ip6tnl | ipip | sit
}\n");
+ fprintf(stderr, " bridge | ipoib | ip6tnl | ipip | sit
| vxlan }\n");
}
exit(-1);
}
--
1.7.2.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body o
From: Zhi Yong Wu
HI, guys,
Any comments or ideas are appreciated, thanks.
NOTE:
The patchset can be obtained via my kernel dev git on github:
git://github.com/wuzhy/kernel.git hot_tracking
If you're interested, you can also review them via
https://github.com/wuzhy/kernel/commits
che_init(void);
+extern int hot_track_init(struct super_block *sb);
+extern void hot_track_exit(struct super_block *sb);
+extern void hot_inode_item_put(struct hot_inode_item *he);
#endif /* _LINUX_HOTTRACK_H */
--
1.7.6.5
--
To unsubscribe from this list: send the line "unsubscribe linux-k
(struct super_block *sb);
extern void hot_track_exit(struct super_block *sb);
extern void hot_inode_item_put(struct hot_inode_item *he);
+extern void hot_update_freqs(struct inode *inode, loff_t start,
+ size_t len, int rw);
+extern struct hot_inode_item *hot_in
* PAGE_CACHE_SIZE, 0);
+
return ret;
}
--
1.7.6.5
--
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the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
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from this list: send the line "unsubscribe linux-kernel" in
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{
/* map of range temperature */
struct hot_map_head heat_range_map[HEAT_MAP_SIZE];
unsigned int hot_map_nr;
+
+ struct workqueue_struct *update_wq;
+ struct delayed_work update_work;
};
extern void __init hot_cache_init(void);
--
1.7.6.5
--
To unsubscribe
ided by specific FS */
+ struct hot_func_ops ops;
+};
+
struct hot_info {
struct hot_rb_tree hot_inode_tree;
spinlock_t lock; /*protect inode tree */
@@ -91,6 +109,7 @@ struct hot_info {
struct workqueue_struct *update_wq;
struct delayed_work update_work;
+
extern void __init hot_cache_init(void);
extern int hot_track_init(struct super_block *sb);
extern void hot_track_exit(struct super_block *sb);
--
1.7.6.5
--
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seq_puts(seq, ",skip_balance");
if (btrfs_test_opt(root, PANIC_ON_FATAL_ERROR))
seq_puts(seq, ",fatal_errors=panic");
+ if (btrfs_test_opt(root, HOT_TRACK))
+ seq_puts(seq, ",hot_track");
return 0;
}
--
1.7.6.5
--
To unsubscrib
-
include/linux/hot_tracking.h |7 +++
kernel/sysctl.c | 14 ++
4 files changed, 30 insertions(+), 12 deletions(-)
diff --git a/fs/hot_tracking.c b/fs/hot_tracking.c
index a98bfe6..69a6d33 100644
--- a/fs/hot_tracking.c
+++ b/fs/hot_tracking.c
@@ -27,6 +27,12
test devid 1 transid 29 /dev/sdb
+[ 1505.952977] btrfs: disk space caching is enabled
+[ 1506.069678] vfs: turning on hot data tracking
+
+2.) Mount debugfs at first:
+
+$ mount -t debugfs none /sys/kernel/debug
+$ ls -l /sys/kernel/debug/hot_track/
+total 0
+drwxr-xr-x 2 root root 0 Aug 8 04:40 sdb
+$
From: Zhi Yong Wu
Add a /sys/kernel/debug/hot_track// directory for each
volume that contains two files. The first, `inode_stats', contains the
heat information for inodes that have been brought into the hot data map
structures. The second, `range_stats', contains similar information
eue_struct *update_wq;
struct delayed_work update_work;
struct hot_type *hot_type;
+ struct shrinker hot_shrink;
};
extern void __init hot_cache_init(void);
--
1.7.6.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a mes
ytes in hot_range_tree */
+ size_t len; /* length in bytes */
+};
+
+struct hot_info {
+ struct hot_rb_tree hot_inode_tree;
+ spinlock_t lock; /*protect inode tree */
+};
+
+extern void __init hot_cache_init(void);
+
+#endif /* _LINUX_HOTTRACK_H */
--
1.7.6.5
--
To unsubscribe from t
struct hot_map_head heat_inode_map[HEAT_MAP_SIZE];
+ /* map of range temperature */
+ struct hot_map_head heat_range_map[HEAT_MAP_SIZE];
+ unsigned int hot_map_nr;
};
extern void __init hot_cache_init(void);
--
1.7.6.5
--
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= 2^X accesses */
#define NRR_MULTIPLIER_POWER 20 /* NRR - number of reads since mount */
#define NRR_COEFF_POWER 0
--
1.7.6.5
--
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_bucket->node_list);
+ root->hot_map_nr++;
+ freq_data->last_temp = temp;
+ }
+ spin_unlock(>hot_range.lock);
+ }
+}
+
+/*
* Initialize inode and range map info.
*/
static void hot_map_init(struct hot_info *root)
--
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Hi,
'ls /sys/devices/system/cpu/vulnerabilities/' doesn't show all known
CPU vulnerabilities and their variants. Only some of them:
l1tf mds meltdown spec_store_bypass spectre_v1 spectre_v2
Wikipedia shows more variants:
d" (which AFAIK is the case for some cases).
> So maintaining this in the kernel is unnecessary to say the least.
Knowing that there is no mitigation or that a CPU is not affected is
quite different from not knowing anything. So I don't see why you
conclude that knowledge is unnecessary.
On Wed, 14 Aug 2019 09:04:57 +0200 Borislav Petkov wrote:
> IMO, what you want does not belong in sysfs but in documentation.
How would documentation (a fixed static text file) tell whether a
particular system is vulnerable or not?
> I partially see your point that a table of sorts mapping all
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sched delay.
Signed-off-by: jun qian
---
kernel/softirq.c | 20 +---
1 file changed, 17 insertions(+), 3 deletions(-)
diff --git a/kernel/softirq.c b/kernel/softirq.c
index c4201b7f..f8e5be9 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -210,7 +210,7 @@ void
sched delay.
Signed-off-by: jun qian
---
kernel/softirq.c | 28
1 file changed, 20 insertions(+), 8 deletions(-)
diff --git a/kernel/softirq.c b/kernel/softirq.c
index c4201b7f..d572ce4 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -25,6 +25,7 @@
#include
sched delay.
Signed-off-by: jun qian
---
kernel/softirq.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/softirq.c b/kernel/softirq.c
index c4201b7f..602d9fa 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -299,6 +299,9 @@ asmlinkage __visible void __softirq_entry
sched delay.
Signed-off-by: jun qian
---
kernel/softirq.c | 21 +
1 file changed, 13 insertions(+), 8 deletions(-)
diff --git a/kernel/softirq.c b/kernel/softirq.c
index c4201b7f..8f47554 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -200,17 +200,15 @@ void
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