Re: ?dm-crypt latency

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Gunter Ohrner wrote:
> Gunter Ohrner wrote:
>> However, I'm also using reiserfs, I will try if ext3 shows better
>> responsiveness and report back if it does.

BTW:

# uname -a
Linux Zweiblum 2.6.24-1-686 #1 SMP Mon Feb 11 14:37:45 UTC 2008 i686
GNU/Linux
#

This is the Debian SID 2.6.24 kernel image based on 2.6.24.2.

AND: I found several of the following in the logs, however I'm not sure when
these happened:

******************************************************************
BUG: soft lockup - CPU#1 stuck for 11s! [kcryptd:5934]

Pid: 5934, comm: kcryptd Not tainted (2.6.24-1-686 #1)
EIP: 0060:[<f8c319c4>] EFLAGS: 00000202 CPU: 1
EIP is at aes_enc_blk+0x9c4/0xb6c [aes_i586]
EAX: dc0c9b79 EBX: add059dc ECX: 655647cd EDX: 00000079
ESI: 4cc74c49 EDI: d579bf67 EBP: df92c870 ESP: ece39dcc
 DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
CR0: 8005003b CR2: b731a000 CR3: 0ef70000 CR4: 000026d0
DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
DR6: ffff0ff0 DR7: 00000400
 [<f8c32702>] aes_encrypt+0x13/0x17 [aes_i586]
 [<f8c2038d>] crypto_cbc_encrypt+0xf3/0x146 [cbc]
 [<f8c2002f>] xor_128+0x0/0x17 [cbc]
 [<c01dd80a>] cfq_allow_merge+0x0/0x5a
 [<f8c326ef>] aes_encrypt+0x0/0x17 [aes_i586]
 [<f8c1b648>] crypt_convert_scatterlist+0x73/0xc3 [dm_crypt]
 [<f8c1b7e0>] crypt_convert+0x148/0x185 [dm_crypt]
 [<f8c1b9fe>] kcryptd_do_crypt+0x1e1/0x25e [dm_crypt]
 [<f8c1b81d>] kcryptd_do_crypt+0x0/0x25e [dm_crypt]
 [<c0132225>] run_workqueue+0x7d/0x109
 [<c0135554>] prepare_to_wait+0x12/0x49
 [<c0132a9b>] worker_thread+0x0/0xc5
 [<c0132b55>] worker_thread+0xba/0xc5
 [<c0135441>] autoremove_wake_function+0x0/0x35
 [<c013537a>] kthread+0x38/0x5e
 [<c0135342>] kthread+0x0/0x5e
 [<c0104b0f>] kernel_thread_helper+0x7/0x10
 =======================
******************************************************************

I'll retry with a vanilla 2.6.24.2 kernel source this afternoon.

Greetings,

  Gunter


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