On 10/30/18 16:28, Bob Friesenhahn wrote:
On Tue, 30 Oct 2018, Udo Grabowski (IMK) wrote:
P.S: During this e-mail writing, number of file grew further:
$ find /var/cache/fontconfig/ -type f | wc -l
526905
man fam:
...
DESCRIPTION
FAM, the File Alteration Monitor, is a subsystem that
applications can
use to be notified when specific files or directories are
changed. It
is intended as a replacement for mechanisms such as poll and
select.
....
So indeed that potentially can have something to do with your
problem if the process polluting your cache wants the FAM service
and doesn't get it and then falls back to something insane.
Recent illumos has added Linux compatibility functions to support LX
Zone functionality and these compatibility functions might be picked up
and used by accident by software which targets Linux. I don't know if
there is an emulation of inotify(7) but it seems like something
important to emulate for LX Zones.
Regardless, the Dtrace Toolkit provides scripts (opensnoop and iosnoop)
which allows observing all I/O activity on the system and so it should
quickly reveal the offender.
Bob
Hi,
no idea how I have missed opensnoop (probably because iosnoop I have
tried was useless):
$ /opt/DTT/Bin/iosnoop
UID PID D BLOCK SIZE COMM PATHNAME
...
0 381 W 275526024 32768 zpool-pz512 <none>
0 381 W 283297216 32768 zpool-pz512 <none>
2903 28881 R 256458773 7168 thunderbird <none>
2903 28881 R 256795291 6656 thunderbird <none>
0 381 W 322684424 4096 zpool-pz512 <none>
BUT, opensnoop showed guilty processes: firefox and thunderbird (which
explains no data increase, when logged off): Example
2903 28883 firefox 53
/var/cache/fontconfig/d937d800-0615-4b33-a228-a4e53ca4493d-le32d4.cache-7
2903 28883 firefox 53
/var/cache/fontconfig/1b72084f-f43d-4fe7-dc05-bc8f25d5a89a-le32d4.cache-7
2903 28883 firefox 53
/var/cache/fontconfig/5f5cc031-6c85-e44b-fe60-d8796ef92dee-le32d4.cache-7
2903 28883 firefox -1
/var/cache/fontconfig/e94921fa-8699-e522-ac57-c327d7aeaed2-le32d4.cache-7
2903 28883 firefox -1
/var/cache/fontconfig/e94921fa-8699-e522-ac57-c327d7aeaed2-le32d4.cache-7
2903 28883 firefox 53
/var/cache/fontconfig/e94921fa-8699-e522-ac57-c327d7aeaed2-le32d4.cache-7.TMP-GMSyA4
2903 28883 firefox 53
/var/cache/fontconfig/e94921fa-8699-e522-ac57-c327d7aeaed2-le32d4.cache-7.NEW
Also, opensnoop shows that firefox tries 2 more directories:
$ grep 222d5260-f64f-4732-87f3-f79737a2876a-le32d4 /tmp/opensnoop.txt
2903 28883 firefox -1
/var/cache/fontconfig/222d5260-f64f-4732-87f3-f79737a2876a-le32d4.cache-7
2903 28883 firefox -1
/export/home/predrag_zecevic/.cache/fontconfig/222d5260-f64f-4732-87f3-f79737a2876a-le32d4.cache-7
2903 28883 firefox -1
/export/home/predrag_zecevic/.fontconfig/222d5260-f64f-4732-87f3-f79737a2876a-le32d4.cache-7
2903 28883 firefox -1
/var/cache/fontconfig/222d5260-f64f-4732-87f3-f79737a2876a-le32d4.cache-7
2903 28883 firefox -1
/export/home/predrag_zecevic/.cache/fontconfig/222d5260-f64f-4732-87f3-f79737a2876a-le32d4.cache-7
2903 28883 firefox -1
/export/home/predrag_zecevic/.fontconfig/222d5260-f64f-4732-87f3-f79737a2876a-le32d4.cache-7
2903 28883 firefox 53
/var/cache/fontconfig/222d5260-f64f-4732-87f3-f79737a2876a-le32d4.cache-7.TMP-iMSyA4
2903 28883 firefox 53
/var/cache/fontconfig/222d5260-f64f-4732-87f3-f79737a2876a-le32d4.cache-7.NEW
One of them does not exists, but second one has content:
$ du -shc /export/home/predrag_zecevic/.cache/fontconfig/
/export/home/predrag_zecevic/.fontconfig
1,5M /export/home/predrag_zecevic/.cache/fontconfig/
du: cannot access '/export/home/predrag_zecevic/.fontconfig': No such
file or directory
1,5M total
$ ls -alrthd /export/home/predrag_zecevic/.cache/fontconfig/* | tail -4
-rw-r--r-- 1 predrag_zecevic admin 113K Mar 14 2016
/export/home/predrag_zecevic/.cache/fontconfig/c4eda28aefebeb36dd28598006088ed1-le64.cache-4
-rw-r--r-- 1 predrag_zecevic admin 114K Mar 14 2016
/export/home/predrag_zecevic/.cache/fontconfig/d4f9a910920d402be1110037f89e03ac-le64.cache-4
-rw-r--r-- 1 predrag_zecevic admin 113K Mar 14 2016
/export/home/predrag_zecevic/.cache/fontconfig/fde37821cbdb1159b4eac7aa64d92051-le64.cache-4
-rw-r--r-- 1 predrag_zecevic admin 113K Mar 14 2016
/export/home/predrag_zecevic/.cache/fontconfig/cabbd14511b9e8a55e92af97fb3a0461-le64.cache-4
So, that cache file is from 2016.
Any suggestion?
With best regards.
Predrag Zečević
--
Predrag Zečević
Technical Support Analyst
2e Systems GmbH
tel: +49 - 6196 - 95058 - 15
mob: +49 - 174 - 3109288
fax: +49 - 6196 - 95058 - 94
e-mail: predrag.zece...@2e-systems.com
headquarter: 2e Systems GmbH, Koenigsteiner Str. 87, 65812 Bad Soden am
Taunus, Germany
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managing director: Phil Douglas
http://www.2e-systems.com/ - Making your business fly!
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