Pierre Labastie wrote:
> Le 02/04/2013 19:39, Bruce Dubbs a écrit :
>>
>> I was meaning to bring this up again. I get
>>
>> Running ./pmap.test/pmap.exp ...
>> FAIL: pmap X with unreachable process
>> FAIL: pmap XX with unreachable process
That means that it can't find /proc/1. If /proc is mounted, that should
always be there, e.g. `cat /proc/1/cmdline`.
>> vmstat gives me:
>>
>> # of expected passes 6
> I have not been able to reproduce the /proc/diskstats beginning with
> sr0. Only in that case does the vmstat test fail.
Isn't sr0 a cdrom? On my system, I have:
11 0 sr0 0 0 0 0 0 0 0 0 0 0 0
Major dev#, minor dev#, name, counters...
>> I think the pmap tests issues have something to do with jhalfs as I
>> can't get it to fail outside of the full jhalfs build.
> Problem is: the tests passed three times on 64 bit, and never on 32 bit
> (for me). All during a full jhalfs build.
Interesting. I'm doing a build right now and waiting for the gcc tests
to complete. I did add a command to copy the procps logs to /tmp, so I
can look at them in a few hours.
> Now, using your script, under chroot, on the 32 bit machine, I still get
> the 2 pmap errors.
What do the logs say?
> Maybe I need to try another 32 bit machine (say finish building lfs...).
> Too late tonight...
> Actually, if I type in the VM for example:
> pmap -X 1
> I get a short (2 lines) output.
$ pmap -X 1
1: init [3]
$ sudo pmap -X 1
1: init [3]
Address Flags Offset Device Inode Rss Pss Referenced
Anonymous Swap Locked Description
00400000 r-xp 00000000 103:00 853659 32 32 32
0 0 0 /sbin/init
pmap: Unknown format in smaps file!
$ pmap -X 1 | hexdump -C
00000000 31 3a 20 20 20 69 6e 69 74 20 5b 33 5d 20 20 0a |1: init
[3] .|
00000010
> Now, under chroot, the same command gives a very long output (and that
> is what is shown in the log).
The regex should still match. I'm thinking it has to dow with pmap
returning an error code along with: "Unknown format in smaps file!"
This indicates a kernel issue to me. Indeed, looking at /proc/1/smaps,
it looks quite different from /proc/1/maps. The pmap.c code does:
fields = sscanf(mapbuf,...
if (nfields < 6)
xerrx(EXIT_FAILURE, _("Unknown format in smaps file!"));
Now that I look at this, the code has not caught up with the kernel.
$ sudo cat /proc/1/smaps
00400000-00408000 r-xp 00000000 103:00 853659 /sbin/init
Size: 32 kB
Rss: 32 kB
I suspect it would work with just changing the above to:
if (nfields < 6) continue;
> Maybe it has something to do with the mounting of the proc virtual system.
>
> Anyway, it seems somewhat random... Is it really worth investigating?
These are the last unexplained errors in my build of LFS. It would be
nice to get a completely clean build.
-- Bruce
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