As for the second problem, which just happened: my web browser (Opera
6.0 final, and 6.0B2) just crashed on me. Fine, no problem. But in crashing,
should it lock up any shell running any program accessing /proc? This is
reproducible with any kernel >= 2.5.7. After the crash, I get the following
from ps:
bradl@bellicha:~> ps
Hangs.
'strace ps' shows:
open("/proc/1345/stat", O_RDONLY) = 7
read(7, "1345 (in.identd) S 1340 1339 133"..., 511) = 184
close(7) = 0
open("/proc/1345/statm", O_RDONLY) = 7
read(7, "254 254 193 8 5 241 61\n", 511) = 23
close(7) = 0
open("/proc/1345/status", O_RDONLY) = 7
read(7, "Name:\tin.identd\nState:\tS (sleepi"..., 511) = 451
close(7) = 0
open("/proc/1345/cmdline", O_RDONLY) = 7
read(7, "in.identd\0-P/dev/null\0", 2047) = 22
close(7) = 0
open("/proc/1345/environ", O_RDONLY) = -1 EACCES (Permission denied)
stat64(0x4002eb60, 0xbffff3fc) = 0
open("/proc/1528/stat", O_RDONLY) = 7
read(7, "1528 (opera) S 1 292 231 1025 28"..., 511) = 183
close(7) = 0
open("/proc/1528/statm", O_RDONLY) = 7
read(7, "261 261 212 84 0 177 49\n", 511) = 24
close(7) = 0
open("/proc/1528/status", O_RDONLY) = 7
read(7, "Name:\topera\nState:\tS (sleeping)\n"..., 511) = 467
close(7) = 0
open("/proc/1528/cmdline", O_RDONLY) = 7
read(7, "/bin/sh\0/usr/local/bin/X11/opera"..., 2047) = 33
close(7) = 0
open("/proc/1528/environ", O_RDONLY) = 7
read(7, "PWD=/home/bradl\0XAUTHORITY=/home"..., 2047) = 1448
brk(0x816f000) = 0x816f000
close(7) = 0
stat64(0x4002eb60, 0xbffff3fc) = 0
open("/proc/1529/stat", O_RDONLY) = 7
read(7,
Then hangs. ctrl-c quits out of this.
Even more so, any command accessing /proc hangs. this including w, ps,
pstree, top, shutdown, kill, killall, and probably others I haven't tested
yet. ps x will run, all the way up to the process which caused this, which is
the crashed browser. But when a browser crashes, it shouldn't take out any
other program accessing proc.
So far, my only way around it, is a reboot. I can issue shutdown -r,
and let it run through rc.K and rc.6. But.. it hangs in rc.K, which calls
killall. I have to go into the box remotely (yep, even when runlevel6 has been
called), manually remount all filesystems readonly, and issue a hard reboot
command. it isn't pretty, but I get the system rebooted in a semi-clean way.
The guys at Opera are saying that it's a kernel bug, since a process
that has crashed shouldn't block accesses to /proc. But do concede that there
could be a bug in Opera that triggers the bug in the kernel.
Any ideas or insights into this?
BL.
-- Brad Littlejohn | Email: tyketto@wizard.com Unix Systems Administrator, | tyketto@ozemail.com.au Web + NewsMaster, BOFH.. Smeghead! :) | http://www.wizard.com/~tyketto PGP: 1024D/E319F0BF 6980 AAD6 7329 E9E6 D569 F620 C819 199A E319 F0BF- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Thu May 23 2002 - 22:00:20 EST