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4a9d81caf8
If the elem is deleted during be iterated on it, the iteration
process will fall into an endless loop.
kernel: NMI watchdog: BUG: soft lockup - CPU#4 stuck for 22s! [nfsd:17137]
PID: 17137 TASK: ffff8818d93c0000 CPU: 4 COMMAND: "nfsd"
[exception RIP: __state_in_grace+76]
RIP: ffffffffc00e817c RSP: ffff8818d3aefc98 RFLAGS: 00000246
RAX: ffff881dc0c38298 RBX: ffffffff81b03580 RCX: ffff881dc02c9f50
RDX: ffff881e3fce8500 RSI: 0000000000000001 RDI: ffffffff81b03580
RBP: ffff8818d3aefca0 R8: 0000000000000020 R9: ffff8818d3aefd40
R10: ffff88017fc03800 R11: ffff8818e83933c0 R12: ffff8818d3aefd40
R13: 0000000000000000 R14: ffff8818e8391068 R15: ffff8818fa6e4000
CS: 0010 SS: 0018
#0 [ffff8818d3aefc98] opens_in_grace at ffffffffc00e81e3 [grace]
#1 [ffff8818d3aefca8] nfs4_preprocess_stateid_op at ffffffffc02a3e6c [nfsd]
#2 [ffff8818d3aefd18] nfsd4_write at ffffffffc028ed5b [nfsd]
#3 [ffff8818d3aefd80] nfsd4_proc_compound at ffffffffc0290a0d [nfsd]
#4 [ffff8818d3aefdd0] nfsd_dispatch at ffffffffc027b800 [nfsd]
#5 [ffff8818d3aefe08] svc_process_common at ffffffffc02017f3 [sunrpc]
#6 [ffff8818d3aefe70] svc_process at ffffffffc0201ce3 [sunrpc]
#7 [ffff8818d3aefe98] nfsd at ffffffffc027b117 [nfsd]
#8 [ffff8818d3aefec8] kthread at ffffffff810b88c1
#9 [ffff8818d3aeff50] ret_from_fork at ffffffff816d1607
The troublemake elem:
crash> lock_manager ffff881dc0c38298
struct lock_manager {
list = {
next = 0xffff881dc0c38298,
prev = 0xffff881dc0c38298
},
block_opens = false
}
Fixes:
|
History
|
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|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
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| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.