Re: [PATCH] tty: Debug EIO from write()
From: Peter Hurley
Date: Thu Jun 13 2013 - 12:29:43 EST
On 06/13/2013 12:16 PM, Markus Trippelsdorf wrote:
I've reproduced the Mozilla build failure, but there's nothing exiting
in the logs. The only strange thing is the single tty_write at
1507.456817 (roughly at this point the Mozilla build failed):
...
[ 1507.453547] tty_release: pts11 (tty count=4)...
[ 1507.455695] tty_open: opening pts11...
[ 1507.455699] tty_release: pts11 (tty count=4)...
[ 1507.455854] tty_open: opening pts11...
[ 1507.455858] tty_release: pts11 (tty count=4)...
[ 1507.456815] tty_open: opening pts11...
[ 1507.456817] tty_write: pts11: 0xa03
Totally obvious now, thanks!
Patch coming.
[ 1507.456819] tty_release: pts11 (tty count=4)...
[ 1507.457313] tty_open: opening pts11...
[ 1507.457317] tty_release: pts11 (tty count=4)...
[ 1507.458711] tty_open: opening pts11...
[ 1507.458715] tty_release: pts11 (tty count=4)...
[ 1507.458918] tty_open: opening pts11...
[ 1507.458922] tty_release: pts11 (tty count=4)...
[ 1507.459062] tty_open: opening pts11...
[ 1507.459066] tty_release: pts11 (tty count=4)...
...
Looking through my logs I see a few ldisc errors, but please note that they are
all unrelated to the actual Mozilla failure.
Jun 13 17:31:07 x4 kernel: tty_open: opening pts11...
Jun 13 17:31:07 x4 kernel: tty_release: pts11 (tty count=4)...
Jun 13 17:31:08 x4 kernel: tty_release: ptm1 (tty count=1)...
Jun 13 17:31:08 x4 kernel: tty_read: pts1: ldisc error (0xa05)
These "ldisc error"s are expected. In this case, the master end has closed while
the slave end is reading....
Jun 13 17:31:08 x4 kernel: pts1 vhangup...
Jun 13 17:31:08 x4 kernel: hung_up_tty_write: pts1: 0x200a05
and writing.
The others in this snippet are similar.
Jun 13 17:31:08 x4 kernel: tty_release: pts1 (tty count=2)...
Jun 13 17:31:08 x4 kernel: tty_release: ptm1: final close
Jun 13 17:31:08 x4 kernel: tty_release: ptm1: freeing structure...
Jun 13 17:31:08 x4 kernel: tty_release: ptm0 (tty count=1)...
Jun 13 17:31:08 x4 kernel: pts0 vhangup...
Jun 13 17:31:08 x4 kernel: tty_release: pts0 (tty count=1)...
Jun 13 17:31:08 x4 kernel: tty_release: pts0: final close
Jun 13 17:31:08 x4 kernel: tty_release: pts0: freeing structure...
Jun 13 17:31:08 x4 kernel: tty_release: tty1 (tty count=8)...
Jun 13 17:31:08 x4 kernel: tty_release: tty3 (tty count=1)...
Jun 13 17:31:08 x4 kernel: tty_release: tty3: final close
Jun 13 17:31:08 x4 kernel: tty_release: tty3: freeing structure...
Jun 13 17:31:11 x4 kernel: tty_open: opening tty1...
Jun 13 17:31:11 x4 kernel: tty_open: opening tty1...
Jun 13 17:31:11 x4 kernel: tty_release: tty1 (tty count=9)...
Jun 13 17:31:13 x4 kernel: tty_release: tty1 (tty count=8)...
Jun 13 17:31:13 x4 kernel: tty_release: tty2 (tty count=1)...
Jun 13 17:31:13 x4 kernel: tty_release: tty2: final close
Jun 13 17:31:13 x4 kernel: tty_release: tty2: freeing structure...
Jun 13 17:31:13 x4 kernel: tty_release: pts6 (tty count=2)...
Jun 13 17:31:13 x4 kernel: tty1 vhangup session...
Jun 13 17:31:13 x4 kernel: tty_open: opening pts2...
Jun 13 17:31:13 x4 kernel: tty_release: ptm5 (tty count=1)...
Jun 13 17:31:13 x4 kernel: pts5 vhangup...
Jun 13 17:31:13 x4 kernel: tty_release: ptm6 (tty count=1)...
Jun 13 17:31:13 x4 kernel: pts6 vhangup...
Jun 13 17:31:13 x4 kernel: tty_release: ptm6: final close
Jun 13 17:31:13 x4 kernel: tty_release: ptm6: freeing structure...
Jun 13 17:31:13 x4 kernel: tty_release: ptm7 (tty count=1)...
Jun 13 17:31:13 x4 kernel: pts7 vhangup...
Jun 13 17:31:13 x4 kernel: tty_release: pts5 (tty count=1)...
Jun 13 17:31:13 x4 kernel: tty_release: pts5: final close
Jun 13 17:31:13 x4 kernel: tty_release: pts5: freeing structure...
Jun 13 17:31:13 x4 kernel: tty_read: pts7: ldisc error (0x200805)
Jun 13 17:31:13 x4 kernel: tty_release: ptm8 (tty count=1)...
Jun 13 17:31:13 x4 kernel: pts8 vhangup...
Jun 13 17:31:13 x4 kernel: tty_read: pts8: ldisc error (0x200805)
Jun 13 17:31:13 x4 kernel: tty_release: tty1 (tty count=7)...
Jun 13 17:31:13 x4 kernel: tty_release: tty1 (tty count=6)...
Jun 13 17:31:13 x4 kernel: tty_release: ptm9 (tty count=1)...
Jun 13 17:31:13 x4 kernel: pts9 vhangup...
Jun 13 17:31:13 x4 kernel: tty_release: ptm10 (tty count=1)...
Jun 13 17:31:13 x4 kernel: pts10 vhangup...
Jun 13 17:31:13 x4 kernel: hung_up_tty_write: pts10: 0x40a04
Jun 13 17:31:13 x4 kernel: hung_up_tty_write: pts10: 0x40a04
Jun 13 17:31:13 x4 kernel: tty_open: opening tty1...
Jun 13 17:31:13 x4 kernel: tty_release: ptm3 (tty count=1)...
Jun 13 17:31:13 x4 kernel: pts3 vhangup...
Jun 13 17:31:13 x4 kernel: tty_read: pts3: ldisc error (0x200805)
Jun 13 17:31:13 x4 kernel: tty_release: pts7 (tty count=2)...
Jun 13 17:31:13 x4 kernel: tty_release: pts7 (tty count=1)...
Jun 13 17:31:13 x4 kernel: tty_release: pts7: final close
Jun 13 17:31:13 x4 kernel: tty_release: pts7: freeing structure...
Jun 13 17:31:13 x4 kernel: tty_release: pts4 (tty count=2)...
Jun 13 17:31:13 x4 kernel: tty_open: opening tty2...
Jun 13 17:31:13 x4 kernel: tty_release: tty2 (tty count=1)...
Jun 13 17:31:13 x4 kernel: tty_release: tty2: final close
Jun 13 17:31:13 x4 kernel: tty_release: tty2: freeing structure...
Jun 13 17:31:13 x4 kernel: tty_open: opening tty2...
Jun 13 17:31:13 x4 kernel: tty_release: tty1 (tty count=6)...
Jun 13 17:31:13 x4 kernel: tty_release: ptm4 (tty count=1)...
Jun 13 17:31:13 x4 kernel: pts4 vhangup...
Jun 13 17:31:13 x4 kernel: tty_release: ptm4: final close
Jun 13 17:31:13 x4 kernel: tty_release: ptm4: freeing structure...
Jun 13 17:31:13 x4 kernel: tty_release: ptm11 (tty count=1)...
Jun 13 17:31:13 x4 kernel: pts11 vhangup...
Jun 13 17:31:13 x4 kernel: tty_read: pts11: ldisc error (0x200a05)
Jun 13 17:31:13 x4 kernel: tty_release: pts11 (tty count=3)...
Jun 13 17:31:13 x4 kernel: tty_release: pts11 (tty count=2)...
Jun 13 17:31:13 x4 kernel: tty_release: ptm11: final close
Jun 13 17:31:13 x4 kernel: tty_release: ptm11: freeing structure...
Jun 13 17:31:13 x4 kernel: tty_release: ptm2 (tty count=1)...
Jun 13 17:31:13 x4 kernel: pts2 vhangup...
Jun 13 17:31:13 x4 kernel: tty_read: pts2: ldisc error (0x200a05)
Jun 13 17:31:13 x4 kernel: tty_release: pts2 (tty count=3)...
Jun 13 17:31:13 x4 kernel: tty_release: pts3 (tty count=2)...
Jun 13 17:31:13 x4 kernel: hung_up_tty_write: pts3: 0x40a06
Jun 13 17:31:13 x4 kernel: hung_up_tty_write: pts3: 0x40a06
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