Bug related to this issue: https://bugzilla.redhat.com/show_bug.cgi?id=1360131
Now dracut only attempts to copy GlobalKnownHostsFile while generating kdump's
initramfs. This method will cause kdump's failure if users set customized
UserKnownHostsFile in /etc/ssh/ssh_config. This patch simply attempts to copy
those files too while going through /etc/ssh/ssh_config. Note that we need to
make sure ~/foo will be copied as /root/foo in kdump's initramfs.
Extend "rd.memdebug" to "4", and "make_trace_mem" to "4+:komem".
Add new "cleanup_trace_mem" to cleanup the trace if active.
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
The current method for memory debug is to use "rd.memdebug=[0-3]",
it is not enough for debugging kernel modules. For example, when we
want to find out which kernel module consumes a large amount of memory,
"rd.memdebug=[0-3]" won't help too much.
A better way is needed to achieve this requirement, this is useful for
kdump OOM debugging.
The principle of this patch is to use kernel trace to track slab and
buddy allocation calls during kernel module loading(module_init), thus
we can analyze all the trace data and get the total memory consumption.
As for large slab allocation, it will probably fall into buddy allocation,
thus tracing "mm_page_alloc" alone should be enough for the purpose(this
saves quite some trace buffer memory, also large free is quite unlikey
during module loading, we neglect those memory free events).
The trace events include memory calls under "tracing/events/":
kmem/mm_page_alloc
We also inpect the following events to detect the module loading:
module/module_load
module/module_put
Since we use filters to trace events, the final trace data size won't
be too big. Users can adjust the trace buffer size via "trace_buf_size"
kernel boot command line as needed.
We can get the module name and task pid from "module_load" event which
also mark the beginning of the loading, and module_put called by the
same task pid implies the end of the loading. So the memory events
recorded in between by the same task pid are consumed by this module
during loading(i.e. modprobe or module_init()).
With these information, we can record the rough total memory(the larger,
the more precise the result will be) consumption involved by each kernel
module loading.
Thus we introduce this shell script to find out which kernel module
consumes a large amount of memory during loading. Use "rd.memdebug=4"
as the tigger.
After applying this patch and specifying "rd.memdebug=4", during booting
it will print out something extra like below:
0 pages consumed by "pata_acpi"
0 pages consumed by "ata_generic"
1 pages consumed by "drm"
0 pages consumed by "ttm"
0 pages consumed by "drm_kms_helper"
835 pages consumed by "qxl"
0 pages consumed by "mii"
6 pages consumed by "8139cp"
0 pages consumed by "virtio"
0 pages consumed by "virtio_ring"
9 pages consumed by "virtio_pci"
1 pages consumed by "8139too"
0 pages consumed by "serio_raw"
0 pages consumed by "crc32c_intel"
199 pages consumed by "virtio_console"
0 pages consumed by "libcrc32c"
9 pages consumed by "xfs"
From the print, we see clearly that "qxl" consumed the most memory.
This file will be installed as a separate executable named "tracekomem"
in the following patch.
Signed-off-by: Xunlei Pang <xlpang@redhat.com>
Some crashkernel targets still use legacy NTLM auth, which
require those (bsc#869496). This patch enumerates all dependent
hash algorithems, because even though most of them are probably
compiled in, older ones (e.g. md4 and arc4) usually aren't.
Contrary to previous intel pinctrl drivers, the cherryview driver can be
and usually is built as a module. However, it sets up the SDIO pinout
so sdhci can make use of the SD card reader, which may subsequently
hold a root file system on a card (bsc#998440).
IMA validates file signatures based on the security.ima xattr. As of
Linux-4.7, instead of cat'ing the IMA policy into the securityfs policy,
the IMA policy pathname can be written, allowing the IMA policy file
signature to be validated.
This patch first attempts to write the pathname, but on failure falls
back to cat'ing the IMA policy contents .
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
bnx2x can take no longer than 3 seconds to initialize the link in some setups
which can cause fipvlan to fail and thus the fcoe interface(s) won't be
created.
Add another 10 seconds to give the link enough time to initialize.
Signed-off-by: Chad Dupuis <chad.dupuis@cavium.com>
This is a further improvement on PR #105 which re-adds support for nfs:// urls to root=live:nfs://... Symptoms prior to applying this patch are that sysroot.mount times out when following the nfs:// syntax for the path to the live image. An additional case is added to livenet-generator to support the nfs protocol.
ip=2620:0052:0000:2220:0226:b9ff:fe81:cde4::[2620:0052:0000:2220:0000:0000:0000:03fe]:64::ibft0:none
should be
ip=[2620:0052:0000:2220:0226:b9ff:fe81:cde4]::[2620:0052:0000:2220:0000:0000:0000:03fe]:64::ibft0:none
https://bugzilla.redhat.com/show_bug.cgi?id=1322592#c19
(cherry picked from commit b8e6c051c6)
use inst() instead of inst_simple()
/etc/pki/tls/certs/ca-bundle.crt is a symlink to
../../ca-trust/extracted/pem/tls-ca-bundle.pem
with inst() we install the original file also.
https://bugzilla.redhat.com/show_bug.cgi?id=1341280
(cherry picked from commit 1b23c6c65c)
The phy and power modules are needed by some of the recent ARM
devices that have appeared like CHIP and some exynos devices.
Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Harald Hoyer