Skip to contentSkip to conversation

New: "BUG: soft lockup" in proc_fd_link, causing freeze

Bug 66821 [email protected] 1 participant 4 messages Dec 10, 2013

lore
Share & tools
lore

[email protected]

author
#0 lore raw

https://bugzilla.kernel.org/show_bug.cgi?id=66821

            Bug ID: 66821
           Summary: "BUG: soft lockup" in proc_fd_link, causing freeze
           Product: File System
           Version: 2.5
    Kernel Version: 3.13.0-rc3
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: ext4
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 118011
--> https://bugzilla.kernel.org/attachment.cgi?id=118011&action=edit
dmesg output during progressing freeze

Getting this since a few days randomly either as immediate freeze or progressing system freeze. I'm not sure if that's the same bug though (nor if I put this report in the right product/component category, just guessing by the trace).

It starts with

general protection fault: 0000 [#1] PREEMPT SMP
path_get+0x15/0x30
proc_fd_link+0x9e/0xf0
proc_pid_readlink+0x3f/0xe0
SyS_readlinkat+0xeb/0x130
system_call_fastpath+0x1a/0x1f

and becomes

BUG: soft lockup - CPU#5 stuck for 23s! [chrome-sandbox:11068]
proc_fd_link+0x69/0xf0
proc_pid_readlink+0x3f/0xe0
SyS_readlinkat+0xeb/0x130
system_call_fastpath+0x1a/0x1f

Notes:
* This is based only on one dmesg output; I haven't yet gotten around to compare that of different freezes.
* Kernel is self-compiled via the current sources (17b2112f) in Torvald's git; distro is Arch.
* Always appears to happen after the system has run for a while, ie. not right after boot.
* root is btrfs, home is ext4, var is reiserfs.

Signature · 2 lines
You are receiving this mail because:
You are watching the assignee of the bug.
author
#1 lore raw

[Bug 66821] "BUG: soft lockup" in proc_fd_link, causing freeze

https://bugzilla.kernel.org/show_bug.cgi?id=66821

--- Comment #1 from Andreas Reis <[email protected]> --- Created attachment 118021
--> https://bugzilla.kernel.org/attachment.cgi?id=118021&action=edit
dmesg output during progressing freeze, 2

Another freeze. This time it's:

proc_cwd_link+0x5d/0xd0
proc_pid_readlink+0x3f/0xe0
SyS_readlinkat+0xeb/0x130
SyS_readlink+0x1b/0x20
system_call_fastpath+0x1a/0x1f
Signature · 2 lines
You are receiving this mail because:
You are watching the assignee of the bug.
author
#3 lore raw

[Bug 66821] "BUG: soft lockup" in proc_fd_link, causing freeze

In reply to [email protected]

https://bugzilla.kernel.org/show_bug.cgi?id=66821

Theodore Tso <[email protected]> changed:

What |Removed |Added
----------------------------------------------------------------------------

                 CC|                            |[email protected]
          Component|Other                       |Other
           Assignee|[email protected] |[email protected]
                   |g                           |rg
            Product|Other                       |File System

--- Comment #2 from Theodore Tso <[email protected]> ---
proc_cwd_link and proc_fd_link are all procfs routines. So you have something
which is constantly scanning files in /proc?

In any case, it's highly unlikely this is an ext4 issues.

Signature · 2 lines
You are receiving this mail because:
You are watching the assignee of the bug.