[Pacemaker] alignment issues on arm (debian armel arch)
Greg Walton
pacemaker at gwalton.net
Tue Jan 18 07:58:05 EST 2011
thanks, i did manage to figure it out and then steve dake came up with a patch for it. It should eventually go into trunk.
the message buffer is an aligned chunk of mmap'd memory and the first message written to it is aligned, but subsequent ones probably not depending on the length of the already stored packets(they just went in end to end).
the fix was to pad each message as needed and keep them all aligned in the dispatch message buffer.
greg
On 1/18/2011 03:24, Andrew Beekhof wrote:
> Long story short... the buffer is created by the Corosync IPC code.
> See:
>
> gboolean ais_dispatch(int sender, gpointer user_data)
> {
> int rc = CS_OK;
> char *buffer = NULL;
> gboolean good = TRUE;
> gboolean (*dispatch)(AIS_Message*,char*,int) = user_data;
>
> rc = coroipcc_dispatch_get (ais_ipc_handle, (void**)&buffer, 0);
> // passing in a pointer to a NULL pointer, nothing allocated yet
> ...
> }
>
>
> Angus is the corosync IPC specialist, perhaps he has some insights as
> to your alignment issues.
> I know shared memory is involved somehow, perhaps that is complicating things.
>
> I also note that AIS_Message should in theory already be aligned, at
> least to my reading of it.
>
> struct crm_ais_msg_s
> {
> coroipc_response_header_t header __attribute__((aligned(8)));
>
>
> On Thu, Dec 16, 2010 at 10:44 PM, Greg Walton <pacemaker at gwalton.net> wrote:
>> I've been slowly working at getting pacemaker(stable-1.0) with
>> corosync(flatiron) to run on arm little endian arch.
>>
>> I'm having alignment issues that break everything, crm status never reports
>> any nodes joining. I've simplified things down to starting corosync on a
>> single node, and expecting it to contact crmd and join the cluster via
>> ipc(which it's not doing).
>>
>>
>> I have isolated one alignment case I've been trying to fix:
>>
>> The AIS_Message struct pointed to by 'msg" in in ais_dispatch() (from
>> lib/common/ais.c) shows up with odd alignment sometimes which causes access
>> to msg->is_compressed to throw a bus error.
>>
>> What I've been doing is switching the kernel to signal on unaligned access
>> "echo 5 > /proc/cpu/alignment" which gets me a core file.. 99 times out of
>> 100 crmd is the first to core out, within 2 or 3 seconds at most.
>>
>> I should add that I can switch on kernel alignment fixups via "echo 3 >
>> /proc/cpu/alignment" and the single node will sign on with crmd... at least
>> initially, i haven't actually tested beyond "crm status"
>>
>> With some debugging lines in ais.c, I can see that crmd does NOT core when
>> the AIS_Message struct starts in an address that is a multiple of 4. I've
>> fiddled with various __attrib__ align statements in the AIS_Message struct
>> in include/crm/ais.h and regardless of what align attributes I apply to
>> struct members or the struct, the entire struct shows up starting at
>> different alignments, 4 first then some odd/non alignment and cores out.
>>
>> So I'm trying to track down where the memory for the AIS_Message
>> struct/buffer is getting allocated at. I've backed into corosync with
>> coroipcc_dispatch_get(), then socket_recv(), and finally to recvmsg(). I
>> only see 1 char at a time being read from the socket, and returned back to
>> ais_dispatch()... but I got getting fairly confused by all the dispatches
>> and handles being passed around and I'm not sure how the dispatch scheme is
>> supposed to work anyway.
>>
>> So, the big question I have is: In ais_dispatch(), the memory that "msg"
>> points to get's allocated by what/where... and/or is it in corosync or
>> pacemaker?
>>
>>
>> Here's an example of what I'm seeing in gdb( that source line #455 is
>> something I added for debugging, a few lines later the code normally uses
>> msg->is_compressed and you'd get the bus error there instead..
>>
>> Core was generated by `/usr/lib/heartbeat/crmd'.
>> Program terminated with signal 7, Bus error.
>> #0 0x40105048 in ais_dispatch (sender=7, user_data=0xfebc) at ais.c:455
>> 455 crm_debug("msg->is_compressed:%d", msg->is_compressed);
>> (gdb) print msg
>> $1 = (AIS_Message *) 0x40b6832b
>> (gdb) print &msg->is_compressed
>> $2 = (int *) 0x40b6834b
>> (gdb) print *msg
>> $3 = {header = {size = 778, id = 0, error = CS_OK}, id = 1, is_compressed =
>> 0,
>> host = {id = 0, pid = 0, local = 1, type = crm_msg_crmd, size = 0,
>> uname = '\000' <repeats 255 times>}, sender = {id = 855754762,
>> pid = 24720, local = 0, type = crm_msg_crmd, size = 5,
>> uname = "serva", '\000' <repeats 250 times>}, size = 178,
>> compressed_size = 0,
>> data = 0x40b6857f "<create_request_adv origin=\"post_cache_update\"
>> t=\"crmd\" version=\"3.0.1\" subt=\"request\"
>> reference=\"noop-crmd-1292462365-0\" crm_task=\"noop\" crm_sys_to=\"crmd\"
>> crm_sys_from=\"crmd\"/>"}
>> (gdb) bt
>> #0 0x40105048 in ais_dispatch (sender=7, user_data=0xfebc) at ais.c:455
>> #1 0x401ced6c in G_fd_dispatch (source=0x5a4f0, callback=0, user_data=0x0)
>> at GSource.c:303
>> #2 0x405308b4 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
>> #3 0x405346b4 in ?? () from /lib/libglib-2.0.so.0
>> Cannot access memory at address 0x0
>> #4 0x405346b4 in ?? () from /lib/libglib-2.0.so.0
>> Cannot access memory at address 0x0
>> Backtrace stopped: previous frame identical to this frame (corrupt stack?)
>> (gdb)
>>
>>
>> Note that msg=0x40b6832b is not 4 byte aligned by my math. In some cases msg
>> does point to 4 byte aligned memory. I added another debug line to print out
>> %p for msg each time ais_dispatch() is called.
>>
>> Here is part of a corosync.log with my debug prints for msg, you can see
>> crmd cores and re-registers with lrmd after each bus error, then it's
>> aligned good 1 time, then cores again after that, over and over.... 4 byte
>> aligned 1 time then the next it's not.
>>
>> root at serva:/var/lib/heartbeat/cores/hacluster# grep msg /tmp/corosync.log
>> Dec 15 20:19:13 corosync [TOTEM ] downcheck (1000 ms) fail to recv const (50
>> msgs)
>> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: msg %p:0x40b26000
>> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: (char*)msg:+
>> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch:
>> msg->is_compressed:0
>> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: Test alignment of
>> ais_data_len(msg):211
>> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: Test alignment of
>> msg->size():211
>> Dec 15 20:19:15 serva cib: [24692]: debug: ais_dispatch: Test alignment of
>> msg->compressed_size():0
>> Dec 15 20:19:16 serva lrmd: [24693]: debug: on_msg_register:client crmd
>> [24696] registered
>> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: msg %p:0x40b68000
>> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: (char*)msg:+
>> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch:
>> msg->is_compressed:0
>> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: Test alignment of
>> ais_data_len(msg):211
>> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: Test alignment of
>> msg->size():211
>> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: Test alignment of
>> msg->compressed_size():0
>> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: msg %p:0x40b6832b
>> Dec 15 20:19:16 serva crmd: [24696]: debug: ais_dispatch: (char*)msg:
>> Dec 15 20:19:17 serva lrmd: [24693]: debug: on_msg_register:client crmd
>> [24702] registered
>> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: msg %p:0x40b68000
>> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: (char*)msg:+
>> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch:
>> msg->is_compressed:0
>> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: Test alignment of
>> ais_data_len(msg):211
>> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: Test alignment of
>> msg->size():211
>> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: Test alignment of
>> msg->compressed_size():0
>> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: msg %p:0x40b6832b
>> Dec 15 20:19:17 serva crmd: [24702]: debug: ais_dispatch: (char*)msg:
>> Dec 15 20:19:18 serva lrmd: [24693]: debug: on_msg_register:client crmd
>> [24704] registered
>> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: msg %p:0x40b68000
>> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: (char*)msg:+
>> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch:
>> msg->is_compressed:0
>> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: Test alignment of
>> ais_data_len(msg):211
>> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: Test alignment of
>> msg->size():211
>> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: Test alignment of
>> msg->compressed_size():0
>> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: msg %p:0x40b6832b
>> Dec 15 20:19:18 serva crmd: [24704]: debug: ais_dispatch: (char*)msg:
>> Dec 15 20:19:19 serva lrmd: [24693]: debug: on_msg_register:client crmd
>> [24706] registered
>> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: msg %p:0x40b68000
>> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: (char*)msg:+
>> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch:
>> msg->is_compressed:0
>> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: Test alignment of
>> ais_data_len(msg):211
>> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: Test alignment of
>> msg->size():211
>> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: Test alignment of
>> msg->compressed_size():0
>> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: msg %p:0x40b6832b
>> Dec 15 20:19:19 serva crmd: [24706]: debug: ais_dispatch: (char*)msg:
>> Dec 15 20:19:20 serva lrmd: [24693]: debug: on_msg_register:client crmd
>> [24708] registered
>> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: msg %p:0x40b68000
>> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: (char*)msg:+
>> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch:
>> msg->is_compressed:0
>> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: Test alignment of
>> ais_data_len(msg):211
>> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: Test alignment of
>> msg->size():211
>> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: Test alignment of
>> msg->compressed_size():0
>> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: msg %p:0x40b6832b
>> Dec 15 20:19:20 serva crmd: [24708]: debug: ais_dispatch: (char*)msg:
>> Dec 15 20:19:21 serva lrmd: [24693]: debug: on_msg_register:client crmd
>> [24710] registered
>> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: msg %p:0x40b68000
>> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: (char*)msg:+
>> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch:
>> msg->is_compressed:0
>> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: Test alignment of
>> ais_data_len(msg):211
>> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: Test alignment of
>> msg->size():211
>> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: Test alignment of
>> msg->compressed_size():0
>> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: msg %p:0x40b6832b
>> Dec 15 20:19:21 serva crmd: [24710]: debug: ais_dispatch: (char*)msg:
>> Dec 15 20:19:22 serva lrmd: [24693]: debug: on_msg_register:client crmd
>> [24712] registered
>> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: msg %p:0x40b68000
>> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: (char*)msg:+
>> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch:
>> msg->is_compressed:0
>> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: Test alignment of
>> ais_data_len(msg):211
>> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: Test alignment of
>> msg->size():211
>> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: Test alignment of
>> msg->compressed_size():0
>> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: msg %p:0x40b6832b
>> Dec 15 20:19:22 serva crmd: [24712]: debug: ais_dispatch: (char*)msg:
>> Dec 15 20:19:23 serva lrmd: [24693]: debug: on_msg_register:client crmd
>> [24715] registered
>> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: msg %p:0x40b68000
>> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: (char*)msg:+
>> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch:
>> msg->is_compressed:0
>> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: Test alignment of
>> ais_data_len(msg):211
>> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: Test alignment of
>> msg->size():211
>> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: Test alignment of
>> msg->compressed_size():0
>> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: msg %p:0x40b6832b
>> Dec 15 20:19:23 serva crmd: [24715]: debug: ais_dispatch: (char*)msg:
>> Dec 15 20:19:24 serva lrmd: [24693]: debug: on_msg_register:client crmd
>> [24717] registered
>> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: msg %p:0x40b68000
>> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: (char*)msg:+
>> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch:
>> msg->is_compressed:0
>> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: Test alignment of
>> ais_data_len(msg):211
>> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: Test alignment of
>> msg->size():211
>> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: Test alignment of
>> msg->compressed_size():0
>> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: msg %p:0x40b6832b
>> Dec 15 20:19:24 serva crmd: [24717]: debug: ais_dispatch: (char*)msg:
>> Dec 15 20:19:25 serva lrmd: [24693]: debug: on_msg_register:client crmd
>> [24720] registered
>> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: msg %p:0x40b68000
>> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: (char*)msg:+
>> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch:
>> msg->is_compressed:0
>> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: Test alignment of
>> msg->is_compressed:0
>> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: Test alignment of
>> ais_data_len(msg):211
>> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: Test alignment of
>> msg->size():211
>> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: Test alignment of
>> msg->compressed_size():0
>> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: msg %p:0x40b6832b
>> Dec 15 20:19:25 serva crmd: [24720]: debug: ais_dispatch: (char*)msg:
>> Dec 15 20:19:26 serva lrmd: [24693]: debug: on_msg_register:client crmd
>> [24722] registered
>> Dec 15 20:19:26 serva crmd: [24722]: debug: ais_dispatch: msg %p:0x40b68000
>> Dec 15 20:19:26 serva crmd: [24722]: debug: ais_dispatch: (char*)msg:+
>> root at serva:/var/lib/heartbeat/cores/hacluster#
>>
>>
>> here's a short tail of dmesg (which is the "warn" that you can configure
>> /proc/cpu/alignment for) that shows the various PIDs of crmd whenthey bus
>> error.
>> Notice the address 0c40b6834b is the same as my gdb ouptut above shows for
>> print &msg->is_compressed.
>>
>> [728065.861236] Alignment trap: crmd (18435) PC=0x40105008 Instr=0xe5933020
>> Address=0x40b6834b FSR 0x001
>> [728066.902288] Alignment trap: crmd (18438) PC=0x40105008 Instr=0xe5933020
>> Address=0x40b6834b FSR 0x001
>> [728067.944698] Alignment trap: crmd (18440) PC=0x40105008 Instr=0xe5933020
>> Address=0x40b6834b FSR 0x001
>> [735468.169460] Alignment trap: crmd (24696) PC=0x40105048 Instr=0xe5933020
>> Address=0x40b6834b FSR 0x001
>> [735469.296659] Alignment trap: crmd (24702) PC=0x40105048 Instr=0xe5933020
>> Address=0x40b6834b FSR 0x001
>> [735470.337662] Alignment trap: crmd (24704) PC=0x40105048 Instr=0xe5933020
>> Address=0x40b6834b FSR 0x001
>> [735471.403065] Alignment trap: crmd (24706) PC=0x40105048 Instr=0xe5933020
>> Address=0x40b6834b FSR 0x001
>> [735472.395324] Alignment trap: crmd (24708) PC=0x40105048 Instr=0xe5933020
>> Address=0x40b6834b FSR 0x001
>> [735473.426591] Alignment trap: crmd (24710) PC=0x40105048 Instr=0xe5933020
>> Address=0x40b6834b FSR 0x001
>> [735474.462234] Alignment trap: crmd (24712) PC=0x40105048 Instr=0xe5933020
>> Address=0x40b6834b FSR 0x001
>> [735475.505742] Alignment trap: crmd (24715) PC=0x40105048 Instr=0xe5933020
>> Address=0x40b6834b FSR 0x001
>> [735476.542277] Alignment trap: crmd (24717) PC=0x40105048 Instr=0xe5933020
>> Address=0x40b6834b FSR 0x001
>> [735477.587241] Alignment trap: crmd (24720) PC=0x40105048 Instr=0xe5933020
>> Address=0x40b6834b FSR 0x001
>> root at serva:/var/lib/heartbeat/cores/hacluster#
>>
>>
>> Sorry for the massive cut and paste in my first email to the list, I just
>> wanted to throw in all the details I've got and hope that someone can
>> enlighten me further and/or tell me what I missed.
>>
>> Thanks,
>> Greg
>>
>> oh yeah this should cover details on the arch/build some on the arch/build:
>>
>> root at serva:/var/lib/heartbeat/cores/hacluster# uname -a
>> Linux serva 2.6.32-5-kirkwood #1 Fri Nov 26 07:01:06 UTC 2010 armv5tel
>> GNU/Linux
>>
>>
>> root at serva:/var/lib/heartbeat/cores/hacluster# readelf -h
>> /usr/lib/heartbeat/crmd
>> ELF Header:
>> Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
>> Class: ELF32
>> Data: 2's complement, little endian
>> Version: 1 (current)
>> OS/ABI: UNIX - System V
>> ABI Version: 0
>> Type: EXEC (Executable file)
>> Machine: ARM
>> Version: 0x1
>> Entry point address: 0xc1b4
>> Start of program headers: 52 (bytes into file)
>> Start of section headers: 4217016 (bytes into file)
>> Flags: 0x5000002, has entry point, Version5
>> EABI
>> Size of this header: 52 (bytes)
>> Size of program headers: 32 (bytes)
>> Number of program headers: 8
>> Size of section headers: 40 (bytes)
>> Number of section headers: 41
>> Section header string table index: 38
>> root at serva:/var/lib/heartbeat/cores/hacluster#
>>
>> _______________________________________________
>> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>>
>> Project Home: http://www.clusterlabs.org
>> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
>> Bugs:
>> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
>>
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
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