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Xiaoyi Chen 55c4478a8f PM: hibernate: Batch hibernate and resume IO requests 
Hibernate and resume process submits individual IO requests for each page
of the data, so use blk_plug to improve the batching of these requests.

Testing this change with hibernate and resumes consistently shows merging
of the IO requests and more than an order of magnitude improvement in
hibernate and resume speed is observed.

One hibernate and resume cycle for 16GB RAM out of 32GB in use takes
around 21 minutes before the change, and 1 minutes after the change on
a system with limited storage IOPS.

Signed-off-by: Xiaoyi Chen <cxiaoyi@amazon.com>
Co-Developed-by: Anchal Agarwal <anchalag@amazon.com>
Signed-off-by: Anchal Agarwal <anchalag@amazon.com>
[ rjw: Subject and changelog edits, white space damage fixes ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-09-28 15:58:18 +02:00
..
bpf
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2020-09-03 18:50:48 -07:00
cgroup
for-5.9/block-20200802
2020-08-03 11:57:03 -07:00
configs
compiler: remove CONFIG_OPTIMIZE_INLINING entirely
2020-04-07 10:43:42 -07:00
debug
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
dma
dma-pool: Fix an uninitialized variable bug in atomic_pool_expand()
2020-08-27 09:22:56 +02:00
entry
core/entry: Report syscall correctly for trace and audit
2020-09-14 22:49:51 +02:00
events
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
gcov
gcov: add support for GCC 10.1
2020-09-11 09:33:54 -07:00
irq
Three interrupt related fixes for X86:
2020-08-30 12:01:23 -07:00
kcsan
Merge branch 'kcsan' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into locking/core
2020-08-01 09:26:27 +02:00
livepatch
livepatch: Make klp_apply_object_relocs static
2020-05-11 00:31:38 +02:00
locking
locking/percpu-rwsem: Use this_cpu_{inc,dec}() for read_count
2020-09-16 16:26:56 +02:00
power
PM: hibernate: Batch hibernate and resume IO requests
2020-09-28 15:58:18 +02:00
printk
Printk changes for 5.9
2020-08-04 22:22:25 -07:00
rcu
rcu: kasan: record and print call_rcu() call stack
2020-08-07 11:33:28 -07:00
sched
A set of fixes for lockdep, tracing and RCU:
2020-08-30 11:43:50 -07:00
time
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
trace
Merge branch 'akpm' (patches from Andrew)
2020-09-19 18:18:37 -07:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
acct.c
mmap locking API: convert mmap_sem comments
2020-06-09 09:39:14 -07:00
async.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
audit_fsnotify.c
fsnotify: create method handle_inode_event() in fsnotify_operations
2020-07-27 23:25:50 +02:00
audit_tree.c
\n
2020-08-06 19:29:51 -07:00
audit_watch.c
fsnotify: create method handle_inode_event() in fsnotify_operations
2020-07-27 23:25:50 +02:00
audit.c
audit/stable-5.9 PR 20200803
2020-08-04 14:20:26 -07:00
audit.h
revert: 1320a4052ea1 ("audit: trigger accompanying records when no rules present")
2020-07-29 10:00:36 -04:00
auditfilter.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
auditsc.c
audit/stable-5.9 PR 20200803
2020-08-04 14:20:26 -07:00
backtracetest.c
treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()
2020-07-30 11:15:58 -07:00
bounds.c
…
capability.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
compat.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
configs.c
…
context_tracking.c
context_tracking: Ensure that the critical path cannot be instrumented
2020-06-11 15:14:36 +02:00
cpu_pm.c
kernel/cpu_pm: Fix uninitted local in cpu_pm
2020-05-15 11:44:34 -07:00
cpu.c
The changes in this cycle are:
2020-06-03 13:06:42 -07:00
crash_core.c
kdump: append kernel build-id string to VMCOREINFO
2020-08-12 10:58:01 -07:00
crash_dump.c
crash_dump: Remove no longer used saved_max_pfn
2020-04-15 11:21:54 +02:00
cred.c
exec: Teach prepare_exec_creds how exec treats uids & gids
2020-05-20 14:44:21 -05:00
delayacct.c
…
dma.c
…
elfcore.c
…
exec_domain.c
…
exit.c
kernel: add a kernel_wait helper
2020-08-12 10:57:59 -07:00
extable.c
kernel/extable.c: use address-of operator on section symbols
2020-04-07 10:43:42 -07:00
fail_function.c
…
fork.c
fork: adjust sysctl_max_threads definition to match prototype
2020-09-05 12:14:29 -07:00
freezer.c
…
futex.c
futex: Convert to use the preferred 'fallthrough' macro
2020-08-13 21:02:12 +02:00
gen_kheaders.sh
kbuild: add variables for compression tools
2020-06-06 23:42:01 +09:00
groups.c
mm: remove the pgprot argument to __vmalloc
2020-06-02 10:59:11 -07:00
hung_task.c
kernel/hung_task.c: introduce sysctl to print all traces when a hung task is detected
2020-06-08 11:05:56 -07:00
iomem.c
…
irq_work.c
irq_work, smp: Allow irq_work on call_single_queue
2020-05-28 10:54:15 +02:00
jump_label.c
…
kallsyms.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
kcmp.c
kernel/kcmp.c: Use new infrastructure to fix deadlocks in execve
2020-03-25 10:04:01 -05:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
kcov.c
kcov: make some symbols static
2020-08-12 10:58:02 -07:00
kexec_core.c
…
kexec_elf.c
…
kexec_file.c
Misc fixes and small updates all around the place:
2020-08-15 10:38:03 -07:00
kexec_internal.h
…
kexec.c
…
kheaders.c
…
kmod.c
kmod: remove redundant "be an" in the comment
2020-08-12 10:58:01 -07:00
kprobes.c
kprobes: fix kill kprobe which has been marked as gone
2020-09-19 13:13:38 -07:00
ksysfs.c
…
kthread.c
uaccess: add force_uaccess_{begin,end} helpers
2020-08-12 10:57:59 -07:00
latencytop.c
sysctl: pass kernel pointers to ->proc_handler
2020-04-27 02:07:40 -04:00
Makefile
all arch: remove system call sys_sysctl
2020-08-14 19:56:56 -07:00
module_signature.c
…
module_signing.c
…
module-internal.h
…
module.c
Modules updates for v5.9
2020-08-14 11:07:02 -07:00
notifier.c
mm: remove vmalloc_sync_(un)mappings()
2020-06-02 10:59:12 -07:00
nsproxy.c
nsproxy: support CLONE_NEWTIME with setns()
2020-07-08 11:14:22 +02:00
padata.c
padata: fix possible padata_works_lock deadlock
2020-09-04 17:51:55 +10:00
panic.c
panic: make print_oops_end_marker() static
2020-08-12 10:58:02 -07:00
params.c
…
pid_namespace.c
pid_namespace: use checkpoint_restore_ns_capable() for ns_last_pid
2020-07-19 20:14:42 +02:00
pid.c
cap-checkpoint-restore-v5.9
2020-08-04 15:02:07 -07:00
profile.c
…
ptrace.c
…
range.c
…
reboot.c
arch: remove unicore32 port
2020-07-01 12:09:13 +03:00
regset.c
regset: kill ->get()
2020-07-27 14:31:12 -04:00
relay.c
kernel/relay.c: fix memleak on destroy relay channel
2020-08-21 09:52:53 -07:00
resource.c
/dev/mem: Revoke mappings when a driver claims the region
2020-05-27 11:10:05 +02:00
rseq.c
…
scs.c
mm: memcontrol: account kernel stack per node
2020-08-07 11:33:25 -07:00
seccomp.c
seccomp: don't leave dangling ->notif if file allocation fails
2020-09-08 11:30:16 -07:00
signal.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
smp.c
smp: Fix a potential usage of stale nr_cpus
2020-07-22 10:22:04 +02:00
smpboot.c
…
smpboot.h
…
softirq.c
tasklets API update for v5.9-rc1
2020-08-04 13:40:35 -07:00
stackleak.c
stackleak: let stack_erasing_sysctl take a kernel pointer buffer
2020-09-19 13:13:39 -07:00
stacktrace.c
uaccess: add force_uaccess_{begin,end} helpers
2020-08-12 10:57:59 -07:00
stop_machine.c
…
sys_ni.c
all arch: remove system call sys_sysctl
2020-08-14 19:56:56 -07:00
sys.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
sysctl-test.c
…
sysctl.c
mm: allow a controlled amount of unfairness in the page lock
2020-09-17 10:26:41 -07:00
task_work.c
task_work: only grab task signal lock when needed
2020-08-13 09:01:38 -06:00
taskstats.c
…
test_kprobes.c
…
torture.c
torture: Dump ftrace at shutdown only if requested
2020-06-29 12:01:45 -07:00
tracepoint.c
…
tsacct.c
…
ucount.c
ucount: Make sure ucounts in /proc/sys/user don't regress again
2020-04-07 21:51:27 +02:00
uid16.c
…
uid16.h
…
umh.c
kernel: add a kernel_wait helper
2020-08-12 10:57:59 -07:00
up.c
…
user_namespace.c
nsproxy: add struct nsset
2020-05-09 13:57:12 +02:00
user-return-notifier.c
…
user.c
user.c: make uidhash_table static
2020-06-04 19:06:24 -07:00
usermode_driver.c
umd: Stop using split_argv
2020-07-07 11:58:59 -05:00
utsname_sysctl.c
sysctl: pass kernel pointers to ->proc_handler
2020-04-27 02:07:40 -04:00
utsname.c
nsproxy: add struct nsset
2020-05-09 13:57:12 +02:00
watch_queue.c
watch_queue: Limit the number of watches a user can hold
2020-08-17 09:39:18 -07:00
watchdog_hld.c
…
watchdog.c
kernel/watchdog.c: convert {soft/hard}lockup boot parameters to sysctl aliases
2020-06-08 11:05:56 -07:00
workqueue_internal.h
…
workqueue.c
maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault
2020-06-17 10:57:41 -07:00