Rik van Riel 803d5a33d5 fs/proc: fix softlockup in __read_vmcore ...

commit 5cbcb62dddf5346077feb82b7b0c9254222d3445 upstream.

While taking a kernel core dump with makedumpfile on a larger system,
softlockup messages often appear.

While softlockup warnings can be harmless, they can also interfere with
things like RCU freeing memory, which can be problematic when the kdump
kexec image is configured with as little memory as possible.

Avoid the softlockup, and give things like work items and RCU a chance to
do their thing during __read_vmcore by adding a cond_resched.

Link: https://lkml.kernel.org/r/20240507091858.36ff767f@imladris.surriel.com
Signed-off-by: Rik van Riel <riel@surriel.com>
Acked-by: Baoquan He <bhe@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2024-07-05 09:08:18 +02:00

..

array.c

Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-07-08 16:39:53 -07:00

base.c

procfs: block chmod on /proc/thread-self/comm

2023-09-23 10:59:55 +02:00

cmdline.c

…

consoles.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 191

2019-05-30 11:29:21 -07:00

cpuinfo.c

…

devices.c

…

fd.c

…

fd.h

…

generic.c

proc: fix dentry/inode overinstantiating under /proc/${pid}/net

2022-06-14 18:11:41 +02:00

inode.c

proc: Use new_inode not new_inode_pseudo

2020-06-17 16:40:33 +02:00

internal.h

proc: fix lookup in /proc/net subdirectories after setns(2)

2021-01-12 20:16:10 +01:00

interrupts.c

…

Kconfig

Merge branch 'akpm' (patches from Andrew)

2019-07-17 08:58:04 -07:00

kcore.c

arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL

2022-05-15 19:54:46 +02:00

kmsg.c

…

loadavg.c

…

Makefile

…

meminfo.c

proc/meminfo: fix output alignment

2019-10-19 06:32:32 -04:00

namespaces.c

…

nommu.c

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30 11:26:32 -07:00

page.c

fs/proc/page.c: don't access uninitialized memmaps in fs/proc/page.c

2019-10-19 06:32:31 -04:00

proc_net.c

proc: fix dentry/inode overinstantiating under /proc/${pid}/net

2022-06-14 18:11:41 +02:00

proc_sysctl.c

sysctl: add a new register_sysctl_init() interface

2023-02-06 07:52:48 +01:00

proc_tty.c

…

root.c

new helper: get_tree_keyed()

2019-09-05 14:34:22 -04:00

self.c

proc: don't allow async path resolution of /proc/self components

2020-12-02 08:49:48 +01:00

softirqs.c

…

stat.c

…

task_mmu.c

mm: hugetlb: proc: check for hugetlb shared PMD in /proc/PID/smaps

2023-02-22 12:50:28 +01:00

task_nommu.c

proc: use down_read_killable mmap_sem for /proc/pid/maps

2019-07-12 11:05:46 -07:00

thread_self.c

proc: Use new_inode not new_inode_pseudo

2020-06-17 16:40:33 +02:00

uptime.c

…

util.c

…

version.c

…

vmcore.c

fs/proc: fix softlockup in __read_vmcore

2024-07-05 09:08:18 +02:00