Bug 595494
| Summary: | RHEL6.0-20100512.0-Server appears to break console output | ||||||
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| Product: | Red Hat Enterprise Linux 6 | Reporter: | Corey Marthaler <cmarthal> | ||||
| Component: | kernel | Assignee: | Red Hat Kernel Manager <kernel-mgr> | ||||
| Status: | CLOSED DUPLICATE | QA Contact: | Red Hat Kernel QE team <kernel-qe> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | low | ||||||
| Version: | 6.0 | CC: | jvillalo, nstraz | ||||
| Target Milestone: | rc | ||||||
| Target Release: | --- | ||||||
| Hardware: | All | ||||||
| OS: | Linux | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2010-05-25 14:17:45 UTC | Type: | --- | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Description
Corey Marthaler
2010-05-24 19:39:37 UTC
Created attachment 416217 [details]
sosreport from affected system
I'm able to read from ttyS0 if I cat it and type on the serial console, kernel debug output makes it to the serial console, but agetty seems stuck in an ioctl. Other test systems work fine.
[root@taft-01 ~]# strace -p `pidof agetty`
Process 2237 attached - interrupt to quit
fstat(3, {st_mode=S_IFREG|0644, st_size=80, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f87b5a34000
read(3, "Red Hat Enterprise Linux Server "..., 4096) = 80
fstat(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(4, 64), ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B115200 -opost -isig -icanon -echo ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f87b5a33000
write(1, "Red Hat Enterprise Linux Server "..., 60) = 60
write(1, "Kernel 2.6.32-25.el6.x86_64 on a"..., 41) = 41
write(1, "\n", 1) = 1
read(3, "", 4096) = 0
ioctl(0, SNDCTL_TMR_STOP or TCSETSW
sysrq
agetty S ffff88021fc24500 0 2354 1 0x00000080
ffff8802134dfb18 0000000000000082 ffff8802134dfae0 ffff8802134dfadc
ffff8802134dfaa8 ffff88021fc24500 ffff880028256180 000000010067355c
ffff880214922638 ffff8802134dffd8 000000000000fd38 ffff880214922638
Call Trace:
[<ffffffff814c9235>] schedule_timeout+0x225/0x2f0
[<ffffffff811f8121>] ? avc_has_perm+0x71/0x90
[<ffffffff812f1d40>] tty_wait_until_sent+0xb0/0x100
[<ffffffff8108cbb0>] ? autoremove_wake_function+0x0/0x40
[<ffffffff812f2292>] set_termios+0x502/0x530
[<ffffffff811f7eeb>] ? avc_has_perm_noaudit+0x2cb/0x490
[<ffffffff812f270a>] tty_mode_ioctl+0x34a/0x480
[<ffffffff814c987e>] ? mutex_lock+0x1e/0x50
[<ffffffff8131aefa>] ? uart_ioctl+0xea/0x330
[<ffffffff812f2879>] n_tty_ioctl_helper+0x39/0x1c0
[<ffffffff8115f557>] ? nameidata_to_filp+0x57/0x70
[<ffffffff812eee43>] n_tty_ioctl+0x23/0xf0
[<ffffffff812ec41b>] tty_ioctl+0xdb/0x930
[<ffffffff81174772>] vfs_ioctl+0x22/0xa0
[<ffffffff81174914>] do_vfs_ioctl+0x84/0x580
[<ffffffff81174e91>] sys_ioctl+0x81/0xa0
[<ffffffff81013172>] system_call_fastpath+0x16/0x1b
This might be a duplicate of Bug 568418 Though bug 568418 may have been fixed in the kernel you tried. If the hang you see occurs only after you enter a username, then it is likely a duplicate of Bug 590851 Okay RHEL6.0-20100512.0-Server has the 2.6.32-25 kernel which already has the fix for Bug 568418. So this leaves Bug 590851 as the likely culprit. Can you try the test kernel in Brew and see if it fixes your problem? https://brewweb.devel.redhat.com/taskinfo?taskID=2468204 I booted with 2.6.32-28.el6bz590851_v1.x86_64 and I can now use the serial console again. *** This bug has been marked as a duplicate of bug 590851 *** |