mode 100644 Documentation/filesystems/hot_tracking.txt
create mode 100644 fs/hot_tracking.c
create mode 100644 fs/hot_tracking.h
create mode 100644 include/linux/hot_tracking.h
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From: Zhi Yong Wu wu...@linux.vnet.ibm.com
Add a /sys/kernel/debug/hot_track/device_name/ 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
hot_info {
+ unsigned long mount_opt;
+
/* red-black tree that keeps track of fs-wide hot data */
struct hot_inode_tree hot_inode_tree;
};
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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 */
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From: Zhi Yong Wu wu...@linux.vnet.ibm.com
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 wu...@linux.vnet.ibm.com
---
fs/hot_tracking.c
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hot_inode_tree hot_inode_tree;
+};
+
+#endif /* _LINUX_HOTTRACK_H */
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at first:
+
+$ mount -t debugfs none /sys/kernel/debug
+$ ls -l /sys/kernel/debug/vfs_hotdata/
+total 0
+drwxr-xr-x 2 root root 0 Aug 8 04:40 sdb
+$ ls -l /sys/kernel/debug/vfs_hotdata/sdb
+total 0
+-rw-r--r-- 1 root root 0 Aug 8 04:40 inode_data
+-rw-r--r-- 1 root root 0 Aug 8 04:40 range_data
start, u64 len,
+ int rw);
void __init hot_track_cache_init(void);
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)
printf(%s: total=%s, used=%s\n, description, total_bytes,
used_bytes);
}
+ close(fd);
free(sargs);
return 0;
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changed, 12 insertions(+), 4 deletions(-)
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*/
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map info.
*/
static void hot_map_init(struct hot_info *root)
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;
struct hot_type *hot_type;
+ struct shrinker hot_shrink;
};
extern void __init hot_cache_init(void);
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, PANIC_ON_FATAL_ERROR))
seq_puts(seq, ,fatal_errors=panic);
+ if (btrfs_test_opt(root, HOT_TRACK))
+ seq_puts(seq, ,hot_track);
return 0;
}
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if (token == Opt_stripe) {
sbi-s_stripe = arg;
} else if (m-flags MOPT_DATAJ) {
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From: Zhi Yong Wu wu...@linux.vnet.ibm.com
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
+[ 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
+$ ls -l /sys/kernel/debug/hot_track/sdb
-kernel in
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+---
fs/hot_tracking.h|9 -
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
From: Zhi Yong Wu wu...@linux.vnet.ibm.com
Add a /sys/kernel/debug/hot_track/device_name/ 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
[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);
--
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(seconds)
+ */
+#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
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) */
+#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__ */
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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 */
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btrfs: enabling check integrity
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);
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tree */
+};
+
+extern void hot_track_init(struct super_block *sb);
+extern void hot_track_exit(struct super_block *sb);
+
+#endif /* _LINUX_HOTTRACK_H */
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,\
+ struct page, lru)-index) PAGE_CACHE_SHIFT,
+ (u64)nr_pages * PAGE_CACHE_SIZE, 0);
+
return ret;
}
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*global_hot_tracking_info;
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From: Zhi Yong Wu wu...@linux.vnet.ibm.com
Add a /sys/kernel/debug/hot_track/device_name/ 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
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)
+
extern struct hot_info *global_hot_tracking_info;
extern void hot_track_init(struct super_block *sb);
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*global_hot_tracking_info;
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: turning on hot data tracking
+
+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
+$ ls -l /sys/kernel/debug/hot_track/sdb
+total 0
+-rw-r--r-- 1 root root 0 Aug 8 04:40 inode_data
+-rw-r--r
,
+u64 len, int rw);
+
#endif /* _LINUX_HOTTRACK_H */
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*global_hot_tracking_info;
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From: Zhi Yong Wu wu...@linux.vnet.ibm.com
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 can review them via
https://github.com/wuzhy/kernel/commits/hot_tracking
For more infomation
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tree */
+};
+
+void __init hot_cache_init(void);
+
+#endif /* _LINUX_HOTTRACK_H */
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Please
TIME_TO_KICK 300
+
+/*
* The following comments explain what exactly comprises a unit of heat.
*
* Each of six values of heat are calculated and combined in order to form an
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update_work;
+ struct shrinker hot_shrink;
};
void __init hot_cache_init(void);
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From: Zhi Yong Wu wu...@linux.vnet.ibm.com
Add a /sys/kernel/debug/hot_track/device_name/ 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
-kernel in
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+[ 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
+
+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
|9 -
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 18a64ee..15ed407 100644
--- a/fs/hot_tracking.c
+++ b/fs
))
seq_puts(seq, ,fatal_errors=panic);
+ if (btrfs_test_opt(root, HOT_TRACK))
+ seq_puts(seq, ,hot_track);
return 0;
}
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);
+int hot_track_init(struct super_block *sb);
+void hot_track_exit(struct super_block *sb);
+
#endif /* _LINUX_HOTTRACK_H */
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;
+
+ struct workqueue_struct *update_wq;
+ struct delayed_work update_work;
};
void __init hot_cache_init(void);
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From: Zhi Yong Wu wu...@linux.vnet.ibm.com
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 can review them via
https://github.com/wuzhy/kernel/commits/hot_tracking
For more info, please
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,
+ u64 len, int rw);
#endif /* _LINUX_HOTTRACK_H */
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;
+}
+
/*
* Initialize inode and range map arrays.
*/
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)
*/
+#define AVW_COEFF_POWER 0
+
void hot_inode_item_put(struct hot_inode_item *he);
struct hot_inode_item *hot_inode_item_find(struct hot_info *root, u64 ino);
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/* _LINUX_HOTTRACK_H */
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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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))
seq_puts(seq, ,fatal_errors=panic);
+ if (btrfs_test_opt(root, HOT_TRACK))
+ seq_puts(seq, ,hot_track);
return 0;
}
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if (token == Opt_stripe) {
sbi-s_stripe = arg;
} else if (m-flags MOPT_DATAJ) {
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is not enabled
* so users have a chance to detect if there was a real error or not. We don't
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+[ 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
+$ ls -l /sys/kernel/debug/hot_track/sdb
;
struct hot_func_type *hot_func_type;
+ struct shrinker hot_shrink;
};
extern void __init hot_cache_init(void);
--
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+---
fs/hot_tracking.h|9 -
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
-kernel in
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From: Zhi Yong Wu wu...@linux.vnet.ibm.com
Add a /sys/kernel/debug/hot_track/device_name/ 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
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);
--
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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
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;
+ 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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hi,
I'm trying to dump some information from dev.c to user space
file.Following is the code which i'm using to write to user spcae
file.I'm using 2.6.22.x86_64 kernel.
#define _write(f, buf, sz) (f-f_op-write(f, buf, sz, f-f_pos))
#define WRITABLE(f) (f-f_op f-f_op-write)
int
[please CC: me, my subscribe mail was greylisted]
Morning!
My make run for 2.6.23-rc9 ends like this:
GEN .version
CHK include/linux/compile.h
UPD include/linux/compile.h
CC init/version.o
LD init/built-in.o
LD .tmp_vmlinux1
kernel/built-in.o: In function
;
if (key.offset start)
--
1.7.11.7
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\fP ]
[ \fB\-d\fP\fI data-profile\fP ]
-[ \fB\-f\fP\fI ]
+[ \fB\-f\fP ]
[ \fB\-l\fP\fI leafsize\fP ]
[ \fB\-L\fP\fI label\fP ]
[ \fB\-m\fP\fI metadata profile\fP ]
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[\fIqgroupid\fP] \fIpath\fP
+Limit the size of a subvolume quota group.
+.RE
.SH EXIT STATUS
\fBbtrfs\fR returns a zero exist status if it succeeds. Non zero is returned in
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);
/* has cache valid data? */
if (cex-ec_len == 0)
--
1.7.6.5
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it or not.
Thanks Sire!
No more confusion, now.
Regards
DD
Linus
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Hi all, I've bought a USB wireless TA bundled with GPL
Linux drivers for 2.6.11 kernel series.
The driver seems to compile fine with 2.6.15-gentoo-r1
on x86, but can't be used on x86_64 systems.
Technical support can't provide a porting of the
driver in the short time.
It seems
executed when holding vmlist_lock is walking
through the list, so it shouldn't change the behavior. If it does make
sense, BUG_ON(in_interrupt()) can be changed to BUG_ON(in_irq()).
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More
2220SE's with aacraid) please
let me know.
TIA,
Colin.
Unable to handle kernel NULL pointer dereference at 0050 RIP:
[8025fabb] memcpy_c+0xb/0x14
PGD 0
Oops: 0002 [1] SMP
last sysfs file: /class/input/input1/capabilities/sw
CPU 0
Modules linked in: ipmi_devintf ipmi_si
{
+};
+
+#endif /* _LINUX_HOTTRACK_H */
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From: Zhi Yong Wu wu...@linux.vnet.ibm.com
HI, folks
I have pushed the patchset to my kernel dev git tree:
g...@github.com:wuzhy/kernel.git
Also, you can review it via
https://github.com/wuzhy/kernel/commits/hottrack
NOTE:
The patchset still has a lot of bugfix and cleanup to do
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