Tao Liu 46d36b1be1 kdump: round up the total memory size to 128M for crashkernel reservation ... The total memory size we get in kernel is usually slightly less than the actual memory size because BIOS/firmware will reserve some memory region. So it won't export all memory as usable. E.g, on my x86_64 kvm guest with 1G memory, the total_mem value shows: UEFI boot with ovmf: 0x3faef000 Legacy boot kvm guest: 0x3ff7ec00 When specifying crashkernel=1G-2G:128M, if we have a 1G memory machine, we get total size 1023M from firmware. Then it will not fall into 1G-2G, thus no memory reserved. User will never know this, it is hard to let user know the exact total value in kernel. One way is to use dmi/smbios to get physical memory size, but it's not reliable as well. According to Prarit hardware vendors sometimes screw this up. Thus round up total size to 128M to work around this problem. This patch is a resend of [1] and rebased onto v5.19-rc2, and the original credit goes to Dave Young. [1]: http://lists.infradead.org/pipermail/kexec/2018-April/020568.html Link: https://lkml.kernel.org/r/20220627074440.187222-1-ltao@redhat.com Signed-off-by: Tao Liu <ltao@redhat.com> Acked-by: Baoquan He <bhe@redhat.com> Cc: Dave Young <dyoung@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2022-07-17 17:31:40 -07:00
..
bpf	bpf: Limit maximum modifier chain length in btf_check_type_tags	2022-06-15 19:32:12 +02:00
cgroup	Merge branch 'for-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2022-05-25 11:47:25 -07:00
configs	x86/configs: Add x86 debugging Kconfig fragment plus docs	2022-04-06 19:56:29 +02:00
debug	Modules updates for v5.19-rc1	2022-05-26 17:13:43 -07:00
dma	dma-direct: use the correct size for dma_set_encrypted()	2022-06-23 15:26:59 +02:00
entry	* Fix syzkaller NULL pointer dereference	2022-06-08 09:16:31 -07:00
events	Two small perf updates:	2022-06-05 10:40:31 -07:00
futex	drm for 5.19-rc1	2022-05-25 16:18:27 -07:00
gcov	gcov: Remove compiler version check	2021-12-02 17:25:21 +09:00
irq	genirq: PM: Use runtime PM for chained interrupts	2022-06-09 15:58:13 +01:00
kcsan	linux-kselftest-kunit-5.19-rc1	2022-05-25 11:32:53 -07:00
livepatch	Livepatching changes for 5.19	2022-06-02 08:55:01 -07:00
locking	locking/lockdep: Use sched_clock() for random numbers	2022-06-13 10:29:57 +02:00
module	module: Fix prefix for module.sig_enforce module param	2022-06-02 12:44:33 -07:00
power	PM: hibernate: Use kernel_can_power_off()	2022-06-21 20:57:30 +02:00
printk	Revert "printk: add functions to prefer direct printing"	2022-06-23 18:41:40 +02:00
rcu	Merge branch 'rework/kthreads' into for-linus	2022-06-23 19:11:28 +02:00
sched	sched: Fix balance_push() vs __sched_setscheduler()	2022-06-13 10:15:07 +02:00
time	While looking at the ptrace problems with PREEMPT_RT and the problems	2022-06-03 16:13:25 -07:00
trace	block-5.19-2022-06-24	2022-06-24 11:07:54 -07:00
.gitignore
acct.c	kernel/acct: move acct sysctls to its own file	2022-04-06 13:43:44 -07:00
async.c	Revert "module, async: async_synchronize_full() on module init iff async is used"	2022-02-03 11:20:34 -08:00
audit.c	audit: improve audit queue handling when "audit=1" on cmdline	2022-01-25 13:22:51 -05:00
audit.h	audit: log AUDIT_TIME_* records only from rules	2022-02-22 13:51:40 -05:00
audit_fsnotify.c	fsnotify: make allow_dups a property of the group	2022-04-25 14:37:18 +02:00
audit_tree.c	audit: use fsnotify group lock helpers	2022-04-25 14:37:28 +02:00
audit_watch.c	fsnotify: pass flags argument to fsnotify_alloc_group()	2022-04-25 14:37:12 +02:00
auditfilter.c	audit/stable-5.17 PR 20220110	2022-01-11 13:08:21 -08:00
auditsc.c	audit: free module name	2022-06-15 19:28:44 -04:00
backtracetest.c
bounds.c
capability.c	xfs: don't generate selinux audit messages for capability testing	2022-03-09 10:32:06 -08:00
cfi.c	cfi: Fix __cfi_slowpath_diag RCU usage with cpuidle	2022-06-13 09:18:46 -07:00
compat.c
configs.c
context_tracking.c
cpu.c	Intel Trust Domain Extensions	2022-05-23 17:51:12 -07:00
cpu_pm.c
crash_core.c	kdump: round up the total memory size to 128M for crashkernel reservation	2022-07-17 17:31:40 -07:00
crash_dump.c
cred.c	x86: Mark __invalid_creds() __noreturn	2022-03-15 10:32:44 +01:00
delayacct.c	delayacct: track delays from write-protect copy	2022-06-01 15:55:25 -07:00
dma.c
exec_domain.c
exit.c	ptrace: Cleanups for v5.18	2022-03-28 17:29:53 -07:00
extable.c	lkdtm: Really write into kernel text in WRITE_KERN	2022-02-16 23:25:12 +11:00
fail_function.c
fork.c	This set of changes updates init and user mode helper tasks to be	2022-06-03 16:03:05 -07:00
freezer.c
gen_kheaders.sh	kheaders: Have cpio unconditionally replace files	2022-05-08 03:16:59 +09:00
groups.c
hung_task.c	Merge branch 'rework/kthreads' into for-linus	2022-06-23 19:11:28 +02:00
iomem.c
irq_work.c	irq_work: use kasan_record_aux_stack_noalloc() record callstack	2022-04-15 14:49:55 -07:00
jump_label.c
kallsyms.c	kallsyms: move declarations to internal header	2022-07-17 17:31:39 -07:00
kallsyms_internal.h	kallsyms: move declarations to internal header	2022-07-17 17:31:39 -07:00
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt	Revert "signal, x86: Delay calling signals in atomic on RT enabled kernels"	2022-03-31 10:36:55 +02:00
kcov.c	kcov: update pos before writing pc in trace function	2022-05-25 13:05:42 -07:00
kexec.c
kexec_core.c	Not a lot of material this cycle. Many singleton patches against various	2022-05-27 11:22:03 -07:00
kexec_elf.c
kexec_file.c	kexec_file: increase maximum file size to 4G	2022-06-16 19:58:21 -07:00
kexec_internal.h
kheaders.c
kmod.c
kprobes.c	tracing updates for 5.19:	2022-05-29 10:31:36 -07:00
ksysfs.c	kernel/ksysfs.c: use helper macro __ATTR_RW	2022-03-23 19:00:33 -07:00
kthread.c	kthread: make it clear that kthread_create_on_node() might be terminated by any fatal signal	2022-06-16 19:11:30 -07:00
latencytop.c	latencytop: move sysctl to its own file	2022-04-21 11:40:59 -07:00
Makefile	kernel: add platform_has() infrastructure	2022-06-06 08:06:00 +02:00
module_signature.c
notifier.c	notifier: Add blocking/atomic_notifier_chain_register_unique_prio()	2022-05-19 19:30:30 +02:00
nsproxy.c
padata.c	padata: replace cpumask_weight with cpumask_empty in padata.c	2022-01-31 11:21:46 +11:00
panic.c	Merge branch 'rework/kthreads' into for-linus	2022-06-23 19:11:28 +02:00
params.c	kobject: remove kset from struct kset_uevent_ops callbacks	2021-12-28 11:26:18 +01:00
pid.c
pid_namespace.c	kernel: pid_namespace: use NULL instead of using plain integer as pointer	2022-04-29 14:38:00 -07:00
platform-feature.c	kernel: add platform_has() infrastructure	2022-06-06 08:06:00 +02:00
profile.c	profiling: fix shift too large makes kernel panic	2022-06-16 19:58:20 -07:00
ptrace.c	While looking at the ptrace problems with PREEMPT_RT and the problems	2022-06-03 16:13:25 -07:00
range.c
reboot.c	Merge branch 'rework/kthreads' into for-linus	2022-06-23 19:11:28 +02:00
regset.c
relay.c	relay: remove redundant assignment to pointer buf	2022-05-12 20:38:37 -07:00
resource.c	kernel/resource: fix kfree() of bootmem memory again	2022-03-23 19:00:35 -07:00
resource_kunit.c
rseq.c	rseq: Remove broken uapi field layout on 32-bit little endian	2022-02-02 13:11:34 +01:00
scftorture.c	scftorture: Fix distribution of short handler delays	2022-04-11 17:07:29 -07:00
scs.c	kasan, vmalloc: only tag normal vmalloc allocations	2022-03-24 19:06:48 -07:00
seccomp.c	seccomp: Add wait_killable semantic to seccomp user notifier	2022-05-03 14:11:58 -07:00
signal.c	While looking at the ptrace problems with PREEMPT_RT and the problems	2022-06-03 16:13:25 -07:00
smp.c	Scheduler changes in this cycle were:	2022-05-24 11:11:13 -07:00
smpboot.c	cpu/hotplug: Allow the CPU in CPU_UP_PREPARE state to be brought up again.	2022-04-12 14:13:01 +02:00
smpboot.h
softirq.c	smp: Make softirq handling RT safe in flush_smp_call_function_queue()	2022-05-01 10:03:43 +02:00
stackleak.c	stackleak: add on/off stack variants	2022-05-08 01:33:09 -07:00
stacktrace.c	uaccess: remove CONFIG_SET_FS	2022-02-25 09:36:06 +01:00
static_call.c	static_call: Don't make __static_call_return0 static	2022-04-05 09:59:38 +02:00
static_call_inline.c	static_call: Don't make __static_call_return0 static	2022-04-05 09:59:38 +02:00
stop_machine.c	Scheduler changes in this cycle were:	2022-05-24 11:11:13 -07:00
sys.c	arm64/sme: Implement vector length configuration prctl()s	2022-04-22 18:50:54 +01:00
sys_ni.c	mm/mempolicy: wire up syscall set_mempolicy_home_node	2022-01-15 16:30:30 +02:00
sysctl-test.c
sysctl.c	sysctl changes for v5.19-rc1	2022-05-26 16:57:20 -07:00
task_work.c	task_work: allow TWA_SIGNAL without a rescheduling IPI	2022-04-30 08:39:32 -06:00
taskstats.c	kernel: make taskstats available from all net namespaces	2022-04-29 14:38:03 -07:00
torture.c	torture: Wake up kthreads after storing task_struct pointer	2022-02-01 17:24:39 -08:00
tracepoint.c
tsacct.c	taskstats: version 12 with thread group and exe info	2022-04-29 14:38:03 -07:00
ucount.c	ucounts: Handle wrapping in is_ucounts_overlimit	2022-02-17 09:11:57 -06:00
uid16.c
uid16.h
umh.c	kthread: Don't allocate kthread_struct for init and umh	2022-05-06 14:49:44 -05:00
up.c
user-return-notifier.c
user.c
user_namespace.c	ucounts: Fix systemd LimitNPROC with private users regression	2022-02-25 10:40:14 -06:00
usermode_driver.c	blob_to_mnt(): kern_unmount() is needed to undo kern_mount()	2022-05-19 23:25:47 -04:00
utsname.c
utsname_sysctl.c
watch_queue.c	watch_queue: Free the page array when watch_queue is dismantled	2022-04-02 10:37:39 -07:00
watchdog.c	Merge branch 'rework/kthreads' into for-linus	2022-06-23 19:11:28 +02:00
watchdog_hld.c	Revert "printk: add functions to prefer direct printing"	2022-06-23 18:41:40 +02:00
workqueue.c	workqueue: Wrap flush_workqueue() using a macro	2022-06-07 07:07:14 -10:00
workqueue_internal.h