, lru)-index) PAGE_CACHE_SHIFT;
+ hot_rb_update_freqs(mapping-host, start,
+ (u64)nr_pages * PAGE_CACHE_SIZE, 0);
+ }
+
return ret;
}
--
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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_hash.c | 316
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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
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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)
+ hot_track_exit(sb);
+
dput(root);
deactivate_locked_super(sb);
out_free_secdata:
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, lru)-index) PAGE_CACHE_SHIFT;
+ hot_rb_update_freqs(mapping-host, start,
+ (u64)nr_pages * PAGE_CACHE_SIZE, 0);
+ }
+
return ret;
}
--
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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_hash.c | 302
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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
*/
+ struct hot_hash_head heat_range_hl[HEAT_HASH_SIZE];
};
#endif /* _LINUX_HOTTRACK_H */
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{
+};
+
+#endif /* _LINUX_HOTTRACK_H */
--
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:
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@debian-i386:~# ls
-kernel in
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;
- }
- retval = offset;
+ retval = file-f_pos = offset;
}
out:
mutex_unlock(bd_inode-i_mutex);
--
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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/hot_tracking
For more info, please check
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 */
--
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(struct hot_inode_item *he);
#endif /* _LINUX_HOTTRACK_H */
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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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+[ 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
+---
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 94fe029..74d01da 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
--
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workqueue_struct *update_wq;
struct delayed_work update_work;
+ struct hot_type *hot_type;
};
extern void __init hot_cache_init(void);
--
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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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);
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, bridge | ipoib | ip6tnl | ipip | sit
}\n);
+ fprintf(stderr, bridge | ipoib | ip6tnl | ipip | sit
| vxlan }\n);
}
exit(-1);
}
--
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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:
git://github.com/wuzhy/kernel.git hot_tracking
If you're interested, you can also review them via
https://github.com
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update_work;
};
extern void __init hot_cache_init(void);
--
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workqueue_struct *update_wq;
struct delayed_work update_work;
+ struct hot_type *hot_type;
};
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;
}
--
1.7.6.5
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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 a98bfe6..69a6d33 100644
--- a/fs
+[ 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
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
update_work;
struct hot_type *hot_type;
+ struct shrinker hot_shrink;
};
extern void __init hot_cache_init(void);
--
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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);
--
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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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which
inhibits this problem. For example, it 99% reliable segfaults
on compiling aic79xx_core.c file in kernel, while all the rest
(in my configuration anyway) compiles, at least after second
attempt).
It's definitely NOT memory issue - I tried several different
memory modules
and call
dev_queue_xmit fucntion,so that it transmitted through second
interface card.Is mine approach correct?
shahzad
-
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(buffer),
);
return ret;
}
When i call this ,nothing gets printed in file /var/log/messages.Am i
missing something ?
Actually i wana pass a pointer to kernel from user space.Later on data
will be copied to that memory location .i am thinking of using
copy_to_user for copying data.Buffer passed
hi,
I'm doing trying to write some optimized code for AMD dual core
opetron processor.But things are getting no where.I've installed
Fedora 5 with 2.6 series Linux kernel and 4 series GCC
Following are few lines of code which are consuming close to 100
cycles.Yes this is not the forum
hi,
I'm profiling some part of kernel code.Mine profiling mechanism
is based on rdtsc instruction.
Please tell me if i'm profiling correctly.I'm teting linux kernel
2.6.15 and mine system is P4.
function(){
unsigned long long c1,c2,c3,c4,c5;
before=readtsc
,
- buffer_list, item);
+ buffer_list, item, next_item);
break;
default:
ASSERT(0);
--
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+1000
xfs: Introduce an ordered buffer item
[ 500.464036] XFS: Assertion failed: !(bip-bli_item.li_flags
XFS_LI_IN_AIL), file: fs/xfs/xfs_buf_item.c, line: 942
[ 500.465602] [ cut here ]
[ 500.466258] kernel BUG at fs/xfs/xfs_message.c:108!
[ 500.466440] invalid
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kernel a few minutes, execute
$time ./pipe-test-1m
collect data output by time like:
real0m9.326s
user0m0.352s
sys 0m5.640s
3.after the test case finished a few seconds, redo the same one.
d. Test result data
Test kernel without patch 968320b hrtimer: Fix extra wakeups from
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,
RB_RED);
augment_rotate(parent, sibling);
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,
RB_RED);
augment_rotate(parent, sibling);
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Please read
Hi Kent,
I am still seeing deadlock:
[ 930.169234] bcache: bch_cached_dev_attach() Caching sda3 as bcache0
on set 06496904-10ca-489a-ae75-68c6a07d3db1
[ 2522.956188] INFO: task bcache_writebac:2058 blocked for more than
120 seconds.
[ 2522.956199] echo 0 /proc/sys/kernel/hung_task_timeout_secs
On Tue, Aug 27, 2013 at 11:05 PM, Kent Overstreet k...@daterainc.com wrote:
On Tue, Aug 27, 2013 at 08:37:54PM -0700, kernel neophyte wrote:
Hi Kent,
I am still seeing deadlock:
Seeing blk_throtl_bio (what asshole misspells words in their function
names, so when you go to grep for them you
On Wed, Aug 28, 2013 at 11:38 AM, Stefan Priebe - Profihost AG
s.pri...@profihost.ag wrote:
I don't had one for a few days. Which kernel so you use?
3.10 kernel with all of kent's stable patches and perf patches..
and all defaults except for:
echo writeback /sys/block/bcache0/bcache
= -1;
switch (scsi_debug_guard) {
case 1:
--
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XLOG_RECOVER_PASS1 1
#defineXLOG_RECOVER_PASS2 2
+#define XLOG_RECOVER_MAX_QDEPTH 100
+
#endif /* __XFS_LOG_RECOVER_H__ */
--
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);
+ }
+
+ if (!list_empty(done_list))
+ list_splice_init(done_list, trans-r_itemq);
+
xlog_recover_free_trans(trans);
out:
--
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)
+{
+ if (dir)
+ return counter bits;
+ else
+ return counter bits;
+}
+
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_HOTTRACK_H */
--
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use of it to do accurate defragment, and hot relocation
support, etc.
Now it's time to send out its V5 for external review, and
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
/hot_tracking.c| 7 +--
fs/hot_tracking.h| 2 --
include/linux/hot_tracking.h | 3 +++
kernel/sysctl.c | 7 +++
4 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/fs/hot_tracking.c b/fs/hot_tracking.c
index 953dbc9..8c7e403 100644
--- a/fs
-commit_interval);
+ if (btrfs_test_opt(root, HOT_TRACK))
+ seq_puts(seq, ,hot_track);
return 0;
}
--
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...@linux.vnet.ibm.com
---
fs/hot_tracking.c| 31 +++
fs/hot_tracking.h| 23 +++
include/linux/hot_tracking.h | 3 +++
kernel/sysctl.c | 7 +++
4 files changed, 64 insertions(+)
diff --git a/fs/hot_tracking.c
);
out_free_sb:
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*sb);
extern void hot_track_exit(struct super_block *sb);
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: Turning on hot tracking
+
+2.) Retrieve hot tracking info for some specific file by ioctl().
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hot_cache_init(void);
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void hot_freqs_update(struct inode *inode, loff_t start,
size_t len, int rw);
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();
}
}
--
1.8.1.2
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= res.type;
frn-scope = res.scope;
}
- rcu_read_unlock();
local_bh_enable();
}
}
--
1.8.1.2
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From: Baker Zhang baker.ker...@gmail.com
acquire and compile_policy callbacks are necessary for a key manager.
Signed-off-by: Baker Zhang baker.ker...@gmail.com
---
Thanks for all reply.
V1:
For current kernel source, there is no problem.
In our vpn product, we need a xfrm_km in kernel module
addr2line
is used to check the address against the kernel file.
Also, the driver does not curently use the net_driver_ops
API.
I have signed the NDA with the OEM, and I think the SRC
is OK for GPL.
After this issue is solved the project will go on IndieGoGo,
and I will take it to the next level
I have been using linux on Gumstix since around 2007.
I recently posted a request to help me bring an OEM
driver from 2.6.29 to 2.6.34, since that is the kernel
of the system I am developing user-space code on.
I have gotten 3.x kernels working on Gumstix
in the past, but at some point forgot
linux-3.10-rc6 Boots on Gumstix Overo.
Do you want the .config for a defconfig?
Thanks.
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Please read
I have checked the Kernel Source and the Internet.
Not much if any support for LVDS / MIPI.
This would be for Device Drivers under
Multimedia and Video Capture.
Any Discussion?
Is the response to this question something to the effect
of sure... Start writing a driver any time you want
On Sun, Jun 16, 2013 at 10:45:38PM +0200, Guennadi Liakhovetski wrote:
On Sun, 16 Jun 2013, kernel-...@fireacop.com wrote:
I have checked the Kernel Source and the Internet.
Not much if any support for LVDS / MIPI.
What exactly do you need support for? MIPI CSI (2/3) capture
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(seq, ,hot_track);
+ if (btrfs_test_opt(root, HOT_MOVE))
+ seq_puts(seq, ,hot_move);
return 0;
}
--
1.7.11.7
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[] */
+ struct list_head reloc_list;/* used in hot relocation*/
};
/* An item representing an inode and its access frequency */
--
1.7.11.7
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More
;
}
- if (!device-in_fs_metadata ||
+ if (skip || !device-in_fs_metadata ||
device-is_tgtdev_for_dev_replace)
continue;
--
1.7.11.7
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...@linux.vnet.ibm.com
---
fs/btrfs/hot_relocate.c | 26 +-
fs/btrfs/hot_relocate.h | 5 -
include/linux/btrfs.h | 4
kernel/sysctl.c | 22 ++
4 files changed, 43 insertions(+), 14 deletions(-)
diff --git a/fs/btrfs/hot_relocate.c b/fs
| 4 +
include/linux/hot_tracking.h | 1 +
kernel/sysctl.c | 22 ++
19 files changed, 1130 insertions(+), 69 deletions(-)
create mode 100644 fs/btrfs/hot_relocate.c
create mode 100644 fs/btrfs/hot_relocate.h
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1.7.11.7
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hot_relocate_init(struct btrfs_fs_info *fs_info);
+void hot_relocate_exit(struct btrfs_fs_info *fs_info);
+
+#endif /* __HOT_RELOCATE__ */
--
1.7.11.7
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