[PATCH v2 0/2] new struct io_work and use it in f2fs fsverity work

[PATCH v2 0/2] new struct io_work and use it in f2fs fsverity work

[Yi Sun]

Many works will go to submit_bio(). In many cases, the default
io priority of kworker cannot meet the real-time requirements of
the work. Such as f2fs_verify_bio work.

If a high-task-priority process reads the verity-file, it is
possible that the high-task-priority process will be slowly
because the kworker's io priority is too low.

A new work struct containing io priority can solve this problem.

Yi Sun (2):
  workqueue: new struct io_work
  f2fs: set io priority for fsverity work

 fs/f2fs/data.c            | 17 +++++++------
 fs/f2fs/f2fs.h            |  1 +
 fs/f2fs/verity.c          |  5 ++++
 include/linux/workqueue.h | 47 ++++++++++++++++++++++++++++++++++++
 kernel/workqueue.c        | 50 +++++++++++++++++++++++++++++++++++++++
 5 files changed, 113 insertions(+), 7 deletions(-)

-- 
2.25.1

[PATCH v2 1/2] workqueue: new struct io_work

[Yi Sun]

Many works will go to submit_bio(), and in many cases the io priority
of kworker cannot meet the real-time requirements of this work.

So create a new struct io_work, which contains the io priority that
the kworker thread can adjust its own io priority according to.

And,
new function set_io_work_ioprio() to set the io priority of io work,
new function may_adjust_io_work_task_ioprio() to adjust kworker's io
priority,
new function restore_io_work_task_ioprio() to restore kworker's io
priority.

Signed-off-by: Yi Sun <yi.sun@unisoc.com>
---
 include/linux/workqueue.h | 47 ++++++++++++++++++++++++++++++++++++
 kernel/workqueue.c        | 50 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 97 insertions(+)

diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index d9968bfc8eac..4b2cb54a68b2 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -127,6 +127,21 @@ struct rcu_work {
 	struct workqueue_struct *wq;
 };
 
+/*
+ * If a work may do disk IO, it is recommended to use struct io_work
+ * instead of struct work_struct.
+ */
+struct io_work {
+	struct work_struct work;
+
+	/* If the work does submit_bio, io priority may be needed. */
+	unsigned short ioprio;
+	/* Record kworker's original io priority. */
+	unsigned short ori_ioprio;
+	/* Whether the work has set io priority? */
+	long ioprio_flag;
+};
+
 enum wq_affn_scope {
 	WQ_AFFN_DFL,			/* use system default */
 	WQ_AFFN_CPU,			/* one pod per CPU */
@@ -218,6 +233,11 @@ static inline struct rcu_work *to_rcu_work(struct work_struct *work)
 	return container_of(work, struct rcu_work, work);
 }
 
+static inline struct io_work *to_io_work(struct work_struct *work)
+{
+	return container_of(work, struct io_work, work);
+}
+
 struct execute_work {
 	struct work_struct work;
 };
@@ -347,6 +367,18 @@ static inline unsigned int work_static(struct work_struct *work) { return 0; }
 #define INIT_RCU_WORK_ONSTACK(_work, _func)				\
 	INIT_WORK_ONSTACK(&(_work)->work, (_func))
 
+#define INIT_IO_WORK(_work, _func)					\
+	do {								\
+		INIT_WORK(&(_work)->work, (_func));			\
+		(_work)->ioprio_flag = 0;				\
+	} while (0)
+
+#define INIT_IO_WORK_ONSTACK(_work, _func)				\
+	do {								\
+		INIT_WORK_ONSTACK(&(_work)->work, (_func));		\
+		(_work)->ioprio_flag = 0;				\
+	} while (0)
+
 /**
  * work_pending - Find out whether a work item is currently pending
  * @work: The work item in question
@@ -552,6 +584,10 @@ extern bool mod_delayed_work_on(int cpu, struct workqueue_struct *wq,
 			struct delayed_work *dwork, unsigned long delay);
 extern bool queue_rcu_work(struct workqueue_struct *wq, struct rcu_work *rwork);
 
+extern void set_io_work_ioprio(struct io_work *work, unsigned short ioprio);
+extern void may_adjust_io_work_task_ioprio(struct io_work *work);
+extern void restore_io_work_task_ioprio(struct io_work *work);
+
 extern void __flush_workqueue(struct workqueue_struct *wq);
 extern void drain_workqueue(struct workqueue_struct *wq);
 
@@ -636,6 +672,17 @@ static inline bool queue_delayed_work(struct workqueue_struct *wq,
 	return queue_delayed_work_on(WORK_CPU_UNBOUND, wq, dwork, delay);
 }
 
+/**
+ * queue_io_work - queue io work on a workqueue
+ * @wq: workqueue to use
+ * @iowork: io work to queue
+ */
+static inline bool queue_io_work(struct workqueue_struct *wq,
+				      struct io_work *iowork)
+{
+	return queue_work(wq, &(iowork->work));
+}
+
 /**
  * mod_delayed_work - modify delay of or queue a delayed work
  * @wq: workqueue to use
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 3fbaecfc88c2..a55b74d5f560 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -2652,6 +2652,56 @@ bool queue_rcu_work(struct workqueue_struct *wq, struct rcu_work *rwork)
 }
 EXPORT_SYMBOL(queue_rcu_work);
 
+/**
+ * set_io_work_ioprio - set io priority for the current io work
+ * @iowork: the io work to be set
+ * @ioprio: desired io priority
+ *
+ * This function can be called after INIT_IO_WORK if the io priority
+ * of the io work needs to adjust. And it is recommended to use this
+ * function together with may_adjust_io_work_task_ioprio() and
+ * restore_io_work_task_ioprio().
+ */
+void set_io_work_ioprio(struct io_work *iowork, unsigned short ioprio)
+{
+	iowork->ioprio = ioprio;
+	iowork->ioprio_flag = 1;
+}
+EXPORT_SYMBOL(set_io_work_ioprio);
+
+/**
+ * may_adjust_io_work_task_ioprio - maybe adjust the io priority of kworker
+ * @iowork: the io work that kworker will do
+ *
+ * It is recommended to use this function together with set_io_work_ioprio()
+ * and restore_io_work_task_ioprio().
+ */
+void may_adjust_io_work_task_ioprio(struct io_work *iowork)
+{
+	if (iowork->ioprio_flag) {
+		iowork->ori_ioprio = get_current_ioprio();
+		set_task_ioprio(current, iowork->ioprio);
+	}
+}
+EXPORT_SYMBOL(may_adjust_io_work_task_ioprio);
+
+/**
+ * restore_io_work_task_ioprio - restore the io priority of kworker
+ * @iowork: the io work that kworker just did
+ *
+ * When kworker finishes the io work, the original io priority of
+ * kworker should be restored. It is recommended to use this function
+ * together with set_io_work_ioprio() and may_adjust_io_work_task_ioprio().
+ */
+void restore_io_work_task_ioprio(struct io_work *iowork)
+{
+	if (iowork->ioprio_flag) {
+		set_task_ioprio(current, iowork->ori_ioprio);
+		iowork->ioprio_flag = 0;
+	}
+}
+EXPORT_SYMBOL(restore_io_work_task_ioprio);
+
 static struct worker *alloc_worker(int node)
 {
 	struct worker *worker;
-- 
2.25.1

[PATCH v2 2/2] f2fs: set io priority for fsverity work

[Yi Sun]

The io priority of reading the original data of the verity-file
and reading hash blocks during verification should be consistent.

If the io priority is not set, when a high-task-priority process
reads the verity-file, the kworker's io priority may be too low,
resulting in delayed reading of hash blocks, which eventually
causes the high-task-priority process to response slowly.

Signed-off-by: Yi Sun <yi.sun@unisoc.com>
---
 fs/f2fs/data.c   | 17 ++++++++++-------
 fs/f2fs/f2fs.h   |  1 +
 fs/f2fs/verity.c |  5 +++++
 3 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index b9b0debc6b3d..7e8c56a3098b 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -110,7 +110,7 @@ enum bio_post_read_step {
 struct bio_post_read_ctx {
 	struct bio *bio;
 	struct f2fs_sb_info *sbi;
-	struct work_struct work;
+	struct io_work iowork;
 	unsigned int enabled_steps;
 	/*
 	 * decompression_attempted keeps track of whether
@@ -168,10 +168,12 @@ static void f2fs_finish_read_bio(struct bio *bio, bool in_task)
 static void f2fs_verify_bio(struct work_struct *work)
 {
 	struct bio_post_read_ctx *ctx =
-		container_of(work, struct bio_post_read_ctx, work);
+		container_of(to_io_work(work), struct bio_post_read_ctx, iowork);
 	struct bio *bio = ctx->bio;
 	bool may_have_compressed_pages = (ctx->enabled_steps & STEP_DECOMPRESS);
 
+	may_adjust_io_work_task_ioprio(to_io_work(work));
+
 	/*
 	 * fsverity_verify_bio() may call readahead() again, and while verity
 	 * will be disabled for this, decryption and/or decompression may still
@@ -204,6 +206,7 @@ static void f2fs_verify_bio(struct work_struct *work)
 	}
 
 	f2fs_finish_read_bio(bio, true);
+	restore_io_work_task_ioprio(to_io_work(work));
 }
 
 /*
@@ -220,8 +223,8 @@ static void f2fs_verify_and_finish_bio(struct bio *bio, bool in_task)
 	struct bio_post_read_ctx *ctx = bio->bi_private;
 
 	if (ctx && (ctx->enabled_steps & STEP_VERITY)) {
-		INIT_WORK(&ctx->work, f2fs_verify_bio);
-		fsverity_enqueue_verify_work(&ctx->work);
+		INIT_IO_WORK(&ctx->iowork, f2fs_verify_bio);
+		f2fs_enqueue_verify_io_work(&ctx->iowork);
 	} else {
 		f2fs_finish_read_bio(bio, in_task);
 	}
@@ -270,7 +273,7 @@ static void f2fs_handle_step_decompress(struct bio_post_read_ctx *ctx,
 static void f2fs_post_read_work(struct work_struct *work)
 {
 	struct bio_post_read_ctx *ctx =
-		container_of(work, struct bio_post_read_ctx, work);
+		container_of(to_io_work(work), struct bio_post_read_ctx, iowork);
 	struct bio *bio = ctx->bio;
 
 	if ((ctx->enabled_steps & STEP_DECRYPT) && !fscrypt_decrypt_bio(bio)) {
@@ -313,8 +316,8 @@ static void f2fs_read_end_io(struct bio *bio)
 				!f2fs_low_mem_mode(sbi)) {
 			f2fs_handle_step_decompress(ctx, intask);
 		} else if (enabled_steps) {
-			INIT_WORK(&ctx->work, f2fs_post_read_work);
-			queue_work(ctx->sbi->post_read_wq, &ctx->work);
+			INIT_IO_WORK(&ctx->iowork, f2fs_post_read_work);
+			queue_io_work(ctx->sbi->post_read_wq, &ctx->iowork);
 			return;
 		}
 	}
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 1974b6aff397..dc228c50ed30 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -4234,6 +4234,7 @@ void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi);
 
 /* verity.c */
 extern const struct fsverity_operations f2fs_verityops;
+void f2fs_enqueue_verify_io_work(struct io_work *iowork);
 
 /*
  * crypto support
diff --git a/fs/f2fs/verity.c b/fs/f2fs/verity.c
index f7bb0c54502c..fba6aecba9b6 100644
--- a/fs/f2fs/verity.c
+++ b/fs/f2fs/verity.c
@@ -292,3 +292,8 @@ const struct fsverity_operations f2fs_verityops = {
 	.read_merkle_tree_page	= f2fs_read_merkle_tree_page,
 	.write_merkle_tree_block = f2fs_write_merkle_tree_block,
 };
+
+void f2fs_enqueue_verify_io_work(struct io_work *iowork)
+{
+	fsverity_enqueue_verify_work(&(iowork->work));
+}
-- 
2.25.1

Re: [PATCH v2 1/2] workqueue: new struct io_work

[Tejun Heo]

Hello,

On Mon, Jul 01, 2024 at 03:51:37PM +0800, Yi Sun wrote:
> +/*
> + * If a work may do disk IO, it is recommended to use struct io_work
> + * instead of struct work_struct.
> + */
> +struct io_work {
> +	struct work_struct work;
> +
> +	/* If the work does submit_bio, io priority may be needed. */
> +	unsigned short ioprio;
> +	/* Record kworker's original io priority. */
> +	unsigned short ori_ioprio;
> +	/* Whether the work has set io priority? */
> +	long ioprio_flag;
> +};

There are fundamental limitations to this approach in terms of
prioritization. If you tag each work items with priority and then send them
to the same workqueue, there's nothing preventing a low priority issuer from
flooding the workqueue and causing a priority inversion. ie. To solve this
properly, you need per-issuer-class workqueue so that the concurrency limit
is not shared across different priorities.

Now, this limited implementation, while incomplete and easy to defeat, may
still be useful. After all, ioprio itself, I think, is flawed in the same
way. If f2fs wants to implement this internally, that's okay, I suppose, but
as a generic mechanism, I don't think this makes a lot of sense.

Thanks.

-- 
tejun

Re: [PATCH v2 1/2] workqueue: new struct io_work

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 1783 bytes --]

Hi Yi,

kernel test robot noticed the following build errors:

[auto build test ERROR on jaegeuk-f2fs/dev-test]
[also build test ERROR on jaegeuk-f2fs/dev tj-wq/for-next linus/master v6.10-rc6 next-20240701]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Yi-Sun/workqueue-new-struct-io_work/20240701-155343
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev-test
patch link:    https://lore.kernel.org/r/20240701075138.1144575-2-yi.sun%40unisoc.com
patch subject: [PATCH v2 1/2] workqueue: new struct io_work
config: openrisc-defconfig
compiler: or1k-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build):

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202407021129.xmn0uKvq-lkp@intel.com/

All errors (new ones prefixed by >>):

   or1k-linux-ld: kernel/workqueue.o: in function `may_adjust_io_work_task_ioprio':
   workqueue.c:(.text+0x152c): undefined reference to `set_task_ioprio'
>> workqueue.c:(.text+0x152c): relocation truncated to fit: R_OR1K_INSN_REL_26 against undefined symbol `set_task_ioprio'
   or1k-linux-ld: kernel/workqueue.o: in function `restore_io_work_task_ioprio':
   workqueue.c:(.text+0x1578): undefined reference to `set_task_ioprio'
   workqueue.c:(.text+0x1578): relocation truncated to fit: R_OR1K_INSN_REL_26 against undefined symbol `set_task_ioprio'

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

[-- Attachment #2: reproduce --]
[-- Type: text/plain, Size: 730 bytes --]

reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        git remote add jaegeuk-f2fs https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git
        git fetch jaegeuk-f2fs dev-test
        git checkout jaegeuk-f2fs/dev-test
        b4 shazam https://lore.kernel.org/r/20240701075138.1144575-2-yi.sun@unisoc.com
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=openrisc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-13.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=openrisc SHELL=/bin/bash

[-- Attachment #3: config --]
[-- Type: text/plain, Size: 40166 bytes --]

#
# Automatically generated file; DO NOT EDIT.
# Linux/openrisc 6.10.0-rc3 Kernel Configuration
#
CONFIG_CC_VERSION_TEXT="or1k-linux-gcc (GCC) 13.2.0"
CONFIG_CC_IS_GCC=y
CONFIG_GCC_VERSION=130200
CONFIG_CLANG_VERSION=0
CONFIG_AS_IS_GNU=y
CONFIG_AS_VERSION=24100
CONFIG_LD_IS_BFD=y
CONFIG_LD_VERSION=24100
CONFIG_LLD_VERSION=0
CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
CONFIG_GCC_ASM_GOTO_OUTPUT_WORKAROUND=y
CONFIG_CC_HAS_ASM_INLINE=y
CONFIG_CC_HAS_NO_PROFILE_FN_ATTR=y
CONFIG_PAHOLE_VERSION=127
CONFIG_IRQ_WORK=y

#
# General setup
#
CONFIG_BROKEN_ON_SMP=y
CONFIG_INIT_ENV_ARG_LIMIT=32
# CONFIG_COMPILE_TEST is not set
# CONFIG_WERROR is not set
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_BUILD_SALT=""
CONFIG_DEFAULT_INIT=""
CONFIG_DEFAULT_HOSTNAME="(none)"
# CONFIG_SYSVIPC is not set
# CONFIG_POSIX_MQUEUE is not set
# CONFIG_WATCH_QUEUE is not set
CONFIG_CROSS_MEMORY_ATTACH=y
# CONFIG_USELIB is not set
# CONFIG_AUDIT is not set

#
# IRQ subsystem
#
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_IRQ_CHIP=y
CONFIG_IRQ_DOMAIN=y
CONFIG_SPARSE_IRQ=y
# end of IRQ subsystem

CONFIG_GENERIC_IRQ_MULTI_HANDLER=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y

#
# Timers subsystem
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ_COMMON=y
# CONFIG_HZ_PERIODIC is not set
CONFIG_NO_HZ_IDLE=y
CONFIG_NO_HZ=y
# CONFIG_HIGH_RES_TIMERS is not set
# end of Timers subsystem

CONFIG_BPF=y

#
# BPF subsystem
#
# CONFIG_BPF_SYSCALL is not set
# end of BPF subsystem

CONFIG_PREEMPT_NONE_BUILD=y
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set

#
# CPU/Task time and stats accounting
#
CONFIG_TICK_CPU_ACCOUNTING=y
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_TASKSTATS is not set
# CONFIG_PSI is not set
# end of CPU/Task time and stats accounting

#
# RCU Subsystem
#
CONFIG_TINY_RCU=y
# CONFIG_RCU_EXPERT is not set
CONFIG_TINY_SRCU=y
# end of RCU Subsystem

# CONFIG_IKCONFIG is not set
# CONFIG_IKHEADERS is not set
CONFIG_LOG_BUF_SHIFT=14

#
# Scheduler features
#
# end of Scheduler features

CONFIG_CC_IMPLICIT_FALLTHROUGH="-Wimplicit-fallthrough=5"
CONFIG_GCC10_NO_ARRAY_BOUNDS=y
CONFIG_CC_NO_ARRAY_BOUNDS=y
CONFIG_GCC_NO_STRINGOP_OVERFLOW=y
CONFIG_CC_NO_STRINGOP_OVERFLOW=y
# CONFIG_CGROUPS is not set
# CONFIG_NAMESPACES is not set
# CONFIG_CHECKPOINT_RESTORE is not set
# CONFIG_SCHED_AUTOGROUP is not set
# CONFIG_RELAY is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
# CONFIG_RD_GZIP is not set
CONFIG_RD_BZIP2=y
CONFIG_RD_LZMA=y
CONFIG_RD_XZ=y
CONFIG_RD_LZO=y
CONFIG_RD_LZ4=y
CONFIG_RD_ZSTD=y
# CONFIG_BOOT_CONFIG is not set
CONFIG_INITRAMFS_PRESERVE_MTIME=y
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_SYSCTL=y
CONFIG_HAVE_UID16=y
CONFIG_EXPERT=y
CONFIG_UID16=y
CONFIG_MULTIUSER=y
# CONFIG_SGETMASK_SYSCALL is not set
CONFIG_SYSFS_SYSCALL=y
CONFIG_FHANDLE=y
CONFIG_POSIX_TIMERS=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
# CONFIG_BASE_SMALL is not set
CONFIG_FUTEX=y
CONFIG_FUTEX_PI=y
# CONFIG_EPOLL is not set
CONFIG_SIGNALFD=y
# CONFIG_TIMERFD is not set
# CONFIG_EVENTFD is not set
CONFIG_SHMEM=y
# CONFIG_AIO is not set
CONFIG_IO_URING=y
CONFIG_ADVISE_SYSCALLS=y
CONFIG_MEMBARRIER=y
# CONFIG_KCMP is not set
CONFIG_CACHESTAT_SYSCALL=y
# CONFIG_PC104 is not set
# CONFIG_KALLSYMS is not set

#
# Kernel Performance Events And Counters
#
# end of Kernel Performance Events And Counters

# CONFIG_PROFILING is not set

#
# Kexec and crash features
#
# end of Kexec and crash features
# end of General setup

CONFIG_OPENRISC=y
CONFIG_CPU_BIG_ENDIAN=y
CONFIG_MMU=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_NO_IOPORT_MAP=y
CONFIG_GENERIC_CSUM=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_LOCKDEP_SUPPORT=y

#
# Processor type and features
#
CONFIG_OR1K_1200=y
# CONFIG_DCACHE_WRITETHROUGH is not set
CONFIG_OPENRISC_BUILTIN_DTB="or1ksim"

#
# Class II Instructions
#
CONFIG_OPENRISC_HAVE_INST_FF1=y
CONFIG_OPENRISC_HAVE_INST_FL1=y
CONFIG_OPENRISC_HAVE_INST_MUL=y
CONFIG_OPENRISC_HAVE_INST_DIV=y
# CONFIG_OPENRISC_HAVE_INST_CMOV is not set
# CONFIG_OPENRISC_HAVE_INST_ROR is not set
# CONFIG_OPENRISC_HAVE_INST_RORI is not set
# CONFIG_OPENRISC_HAVE_INST_SEXT is not set
# end of Class II Instructions

# CONFIG_SMP is not set
CONFIG_FPU=y
CONFIG_HZ_100=y
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=100
CONFIG_OPENRISC_NO_SPR_SR_DSX=y
# CONFIG_OPENRISC_HAVE_SHADOW_GPRS is not set
CONFIG_CMDLINE=""

#
# Debugging options
#
CONFIG_JUMP_UPON_UNHANDLED_EXCEPTION=y
# CONFIG_OPENRISC_ESR_EXCEPTION_BUG_CHECK is not set
# end of Debugging options
# end of Processor type and features

CONFIG_CPU_MITIGATIONS=y

#
# General architecture-dependent options
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_GENERIC_SMP_IDLE_THREAD=y
CONFIG_ARCH_HAS_DMA_SET_UNCACHED=y
CONFIG_ARCH_HAS_DMA_CLEAR_UNCACHED=y
CONFIG_ARCH_32BIT_OFF_T=y
CONFIG_MMU_GATHER_NO_RANGE=y
CONFIG_MMU_GATHER_MERGE_VMAS=y
CONFIG_MMU_LAZY_TLB_REFCOUNT=y
CONFIG_LTO_NONE=y
CONFIG_MODULES_USE_ELF_RELA=y
CONFIG_PGTABLE_LEVELS=2
CONFIG_HAVE_PAGE_SIZE_8KB=y
CONFIG_PAGE_SIZE_8KB=y
CONFIG_PAGE_SIZE_LESS_THAN_64KB=y
CONFIG_PAGE_SIZE_LESS_THAN_256KB=y
CONFIG_PAGE_SHIFT=13
CONFIG_COMPAT_32BIT_TIME=y

#
# GCOV-based kernel profiling
#
# end of GCOV-based kernel profiling

CONFIG_FUNCTION_ALIGNMENT=0
# end of General architecture-dependent options

CONFIG_RT_MUTEXES=y
CONFIG_MODULES=y
# CONFIG_MODULE_FORCE_LOAD is not set
# CONFIG_MODULE_UNLOAD is not set
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
# CONFIG_MODULE_SIG is not set
CONFIG_MODULE_COMPRESS_NONE=y
# CONFIG_MODULE_COMPRESS_GZIP is not set
# CONFIG_MODULE_COMPRESS_XZ is not set
# CONFIG_MODULE_COMPRESS_ZSTD is not set
# CONFIG_MODULE_ALLOW_MISSING_NAMESPACE_IMPORTS is not set
CONFIG_MODPROBE_PATH="/sbin/modprobe"
# CONFIG_TRIM_UNUSED_KSYMS is not set
# CONFIG_BLOCK is not set
CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_INLINE_READ_UNLOCK=y
CONFIG_INLINE_READ_UNLOCK_IRQ=y
CONFIG_INLINE_WRITE_UNLOCK=y
CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
CONFIG_ARCH_USE_QUEUED_RWLOCKS=y

#
# Executable file formats
#
CONFIG_BINFMT_ELF=y
CONFIG_ELFCORE=y
CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS=y
CONFIG_BINFMT_SCRIPT=y
# CONFIG_BINFMT_MISC is not set
CONFIG_COREDUMP=y
# end of Executable file formats

#
# Memory Management options
#

#
# Slab allocator options
#
CONFIG_SLUB=y
CONFIG_SLUB_TINY=y
CONFIG_SLAB_MERGE_DEFAULT=y
# end of Slab allocator options

# CONFIG_SHUFFLE_PAGE_ALLOCATOR is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_FLATMEM=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_COMPACTION=y
CONFIG_COMPACT_UNEVICTABLE_DEFAULT=1
# CONFIG_PAGE_REPORTING is not set
CONFIG_MIGRATION=y
CONFIG_PCP_BATCH_SCALE_MAX=5
# CONFIG_KSM is not set
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
CONFIG_NEED_PER_CPU_KM=y
# CONFIG_CMA is not set
# CONFIG_IDLE_PAGE_TRACKING is not set
# CONFIG_VM_EVENT_COUNTERS is not set
# CONFIG_PERCPU_STATS is not set

#
# GUP_TEST needs to have DEBUG_FS enabled
#
# CONFIG_DMAPOOL_TEST is not set
CONFIG_MEMFD_CREATE=y
# CONFIG_ANON_VMA_NAME is not set
# CONFIG_USERFAULTFD is not set
# CONFIG_LRU_GEN is not set
CONFIG_EXECMEM=y

#
# Data Access Monitoring
#
# CONFIG_DAMON is not set
# end of Data Access Monitoring
# end of Memory Management options

CONFIG_NET=y
CONFIG_SKB_EXTENSIONS=y

#
# Networking options
#
CONFIG_PACKET=y
# CONFIG_PACKET_DIAG is not set
CONFIG_UNIX=y
CONFIG_AF_UNIX_OOB=y
# CONFIG_UNIX_DIAG is not set
# CONFIG_TLS is not set
# CONFIG_XFRM_USER is not set
# CONFIG_NET_KEY is not set
CONFIG_NET_HANDSHAKE=y
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE_DEMUX is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_NET_IPVTI is not set
# CONFIG_NET_FOU is not set
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
CONFIG_INET_TABLE_PERTURB_ORDER=16
# CONFIG_INET_DIAG is not set
CONFIG_TCP_CONG_ADVANCED=y
# CONFIG_TCP_CONG_BIC is not set
# CONFIG_TCP_CONG_CUBIC is not set
# CONFIG_TCP_CONG_WESTWOOD is not set
# CONFIG_TCP_CONG_HTCP is not set
# CONFIG_TCP_CONG_HSTCP is not set
# CONFIG_TCP_CONG_HYBLA is not set
# CONFIG_TCP_CONG_VEGAS is not set
# CONFIG_TCP_CONG_NV is not set
# CONFIG_TCP_CONG_SCALABLE is not set
# CONFIG_TCP_CONG_LP is not set
# CONFIG_TCP_CONG_VENO is not set
# CONFIG_TCP_CONG_YEAH is not set
# CONFIG_TCP_CONG_ILLINOIS is not set
# CONFIG_TCP_CONG_DCTCP is not set
# CONFIG_TCP_CONG_CDG is not set
# CONFIG_TCP_CONG_BBR is not set
CONFIG_DEFAULT_RENO=y
CONFIG_DEFAULT_TCP_CONG="reno"
# CONFIG_TCP_MD5SIG is not set
# CONFIG_IPV6 is not set
CONFIG_MPTCP=y
# CONFIG_NETWORK_SECMARK is not set
CONFIG_NET_PTP_CLASSIFY=y
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
# CONFIG_NETFILTER is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_RDS is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_L2TP is not set
# CONFIG_BRIDGE is not set
# CONFIG_NET_DSA is not set
# CONFIG_VLAN_8021Q is not set
# CONFIG_LLC2 is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_PHONET is not set
# CONFIG_IEEE802154 is not set
# CONFIG_NET_SCHED is not set
# CONFIG_DCB is not set
# CONFIG_BATMAN_ADV is not set
# CONFIG_OPENVSWITCH is not set
# CONFIG_VSOCKETS is not set
# CONFIG_NETLINK_DIAG is not set
# CONFIG_MPLS is not set
# CONFIG_NET_NSH is not set
# CONFIG_HSR is not set
# CONFIG_NET_SWITCHDEV is not set
# CONFIG_NET_L3_MASTER_DEV is not set
# CONFIG_QRTR is not set
# CONFIG_NET_NCSI is not set
CONFIG_MAX_SKB_FRAGS=17
CONFIG_NET_RX_BUSY_POLL=y
CONFIG_BQL=y

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# end of Network testing
# end of Networking options

# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
# CONFIG_AF_KCM is not set
# CONFIG_MCTP is not set
# CONFIG_WIRELESS is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set
# CONFIG_CAIF is not set
# CONFIG_CEPH_LIB is not set
# CONFIG_NFC is not set
# CONFIG_PSAMPLE is not set
# CONFIG_NET_IFE is not set
# CONFIG_LWTUNNEL is not set
CONFIG_NET_SELFTESTS=y
# CONFIG_FAILOVER is not set
CONFIG_ETHTOOL_NETLINK=y

#
# Device Drivers
#
CONFIG_HAVE_PCI=y
CONFIG_GENERIC_PCI_IOMAP=y
# CONFIG_PCI is not set
# CONFIG_PCCARD is not set

#
# Generic Driver Options
#
# CONFIG_UEVENT_HELPER is not set
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
# CONFIG_DEVTMPFS_SAFE is not set
CONFIG_STANDALONE=y
# CONFIG_PREVENT_FIRMWARE_BUILD is not set

#
# Firmware loader
#
# CONFIG_FW_LOADER is not set
# end of Firmware loader

CONFIG_ALLOW_DEV_COREDUMP=y
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_DEBUG_TEST_DRIVER_REMOVE is not set
# CONFIG_TEST_ASYNC_DRIVER_PROBE is not set
CONFIG_GENERIC_CPU_DEVICES=y
# CONFIG_FW_DEVLINK_SYNC_STATE_TIMEOUT is not set
# end of Generic Driver Options

#
# Bus devices
#
# CONFIG_MHI_BUS is not set
# CONFIG_MHI_BUS_EP is not set
# end of Bus devices

#
# Cache Drivers
#
# end of Cache Drivers

# CONFIG_CONNECTOR is not set

#
# Firmware Drivers
#

#
# ARM System Control and Management Interface Protocol
#
# end of ARM System Control and Management Interface Protocol

# CONFIG_FIRMWARE_MEMMAP is not set
# CONFIG_GOOGLE_FIRMWARE is not set

#
# Qualcomm firmware drivers
#
# end of Qualcomm firmware drivers

#
# Tegra firmware driver
#
# end of Tegra firmware driver
# end of Firmware Drivers

# CONFIG_GNSS is not set
# CONFIG_MTD is not set
CONFIG_DTC=y
CONFIG_OF=y
# CONFIG_OF_UNITTEST is not set
CONFIG_OF_FLATTREE=y
CONFIG_OF_EARLY_FLATTREE=y
CONFIG_OF_KOBJ=y
CONFIG_OF_ADDRESS=y
CONFIG_OF_IRQ=y
CONFIG_OF_RESERVED_MEM=y
# CONFIG_OF_OVERLAY is not set
# CONFIG_PARPORT is not set

#
# NVME Support
#
# end of NVME Support

#
# Misc devices
#
# CONFIG_DUMMY_IRQ is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_SRAM is not set
# CONFIG_XILINX_SDFEC is not set
# CONFIG_OPEN_DICE is not set
# CONFIG_VCPU_STALL_DETECTOR is not set
# CONFIG_C2PORT is not set

#
# EEPROM support
#
# CONFIG_EEPROM_93CX6 is not set
# end of EEPROM support

#
# Texas Instruments shared transport line discipline
#
# CONFIG_TI_ST is not set
# end of Texas Instruments shared transport line discipline

#
# Altera FPGA firmware download module (requires I2C)
#
# CONFIG_ECHO is not set
# CONFIG_PVPANIC is not set
# end of Misc devices

#
# SCSI device support
#
# end of SCSI device support

CONFIG_NETDEVICES=y
CONFIG_MII=y
CONFIG_NET_CORE=y
# CONFIG_BONDING is not set
# CONFIG_DUMMY is not set
# CONFIG_WIREGUARD is not set
# CONFIG_EQUALIZER is not set
# CONFIG_NET_TEAM is not set
# CONFIG_MACVLAN is not set
# CONFIG_IPVLAN is not set
# CONFIG_VXLAN is not set
# CONFIG_GENEVE is not set
# CONFIG_BAREUDP is not set
# CONFIG_GTP is not set
# CONFIG_PFCP is not set
# CONFIG_MACSEC is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_TUN is not set
# CONFIG_TUN_VNET_CROSS_LE is not set
# CONFIG_VETH is not set
# CONFIG_NLMON is not set
CONFIG_ETHERNET=y
CONFIG_NET_VENDOR_ALACRITECH=y
# CONFIG_ALTERA_TSE is not set
CONFIG_NET_VENDOR_AMAZON=y
CONFIG_NET_VENDOR_AQUANTIA=y
CONFIG_NET_VENDOR_ARC=y
CONFIG_NET_VENDOR_ASIX=y
CONFIG_NET_VENDOR_BROADCOM=y
# CONFIG_B44 is not set
# CONFIG_BCMGENET is not set
# CONFIG_SYSTEMPORT is not set
CONFIG_NET_VENDOR_CADENCE=y
# CONFIG_MACB is not set
CONFIG_NET_VENDOR_CAVIUM=y
CONFIG_NET_VENDOR_CORTINA=y
# CONFIG_GEMINI_ETHERNET is not set
CONFIG_NET_VENDOR_DAVICOM=y
# CONFIG_DNET is not set
CONFIG_NET_VENDOR_ENGLEDER=y
# CONFIG_TSNEP is not set
CONFIG_NET_VENDOR_EZCHIP=y
# CONFIG_EZCHIP_NPS_MANAGEMENT_ENET is not set
CONFIG_NET_VENDOR_FUNGIBLE=y
CONFIG_NET_VENDOR_GOOGLE=y
CONFIG_NET_VENDOR_HUAWEI=y
CONFIG_NET_VENDOR_I825XX=y
CONFIG_NET_VENDOR_INTEL=y
CONFIG_NET_VENDOR_LITEX=y
# CONFIG_LITEX_LITEETH is not set
CONFIG_NET_VENDOR_MARVELL=y
# CONFIG_MVMDIO is not set
CONFIG_NET_VENDOR_MICREL=y
# CONFIG_KS8851_MLL is not set
CONFIG_NET_VENDOR_MICROCHIP=y
# CONFIG_VCAP is not set
CONFIG_NET_VENDOR_MICROSEMI=y
CONFIG_NET_VENDOR_MICROSOFT=y
CONFIG_NET_VENDOR_NI=y
# CONFIG_NI_XGE_MANAGEMENT_ENET is not set
CONFIG_NET_VENDOR_NATSEMI=y
CONFIG_NET_VENDOR_NETRONOME=y
CONFIG_NET_VENDOR_8390=y
CONFIG_ETHOC=y
CONFIG_NET_VENDOR_PENSANDO=y
CONFIG_NET_VENDOR_QUALCOMM=y
# CONFIG_QCOM_EMAC is not set
# CONFIG_RMNET is not set
CONFIG_NET_VENDOR_RENESAS=y
CONFIG_NET_VENDOR_ROCKER=y
CONFIG_NET_VENDOR_SAMSUNG=y
# CONFIG_SXGBE_ETH is not set
CONFIG_NET_VENDOR_SEEQ=y
CONFIG_NET_VENDOR_SOLARFLARE=y
CONFIG_NET_VENDOR_SOCIONEXT=y
CONFIG_NET_VENDOR_STMICRO=y
# CONFIG_STMMAC_ETH is not set
CONFIG_NET_VENDOR_SYNOPSYS=y
# CONFIG_DWC_XLGMAC is not set
CONFIG_NET_VENDOR_VERTEXCOM=y
CONFIG_NET_VENDOR_VIA=y
# CONFIG_VIA_VELOCITY is not set
CONFIG_NET_VENDOR_WANGXUN=y
CONFIG_NET_VENDOR_WIZNET=y
# CONFIG_WIZNET_W5100 is not set
# CONFIG_WIZNET_W5300 is not set
CONFIG_NET_VENDOR_XILINX=y
# CONFIG_XILINX_EMACLITE is not set
# CONFIG_XILINX_LL_TEMAC is not set
CONFIG_PHYLIB=y
CONFIG_SWPHY=y
CONFIG_FIXED_PHY=y

#
# MII PHY device drivers
#
# CONFIG_AIR_EN8811H_PHY is not set
# CONFIG_AMD_PHY is not set
# CONFIG_ADIN_PHY is not set
# CONFIG_ADIN1100_PHY is not set
# CONFIG_AQUANTIA_PHY is not set
# CONFIG_AX88796B_PHY is not set
# CONFIG_BROADCOM_PHY is not set
# CONFIG_BCM54140_PHY is not set
# CONFIG_BCM7XXX_PHY is not set
# CONFIG_BCM84881_PHY is not set
# CONFIG_BCM87XX_PHY is not set
# CONFIG_CICADA_PHY is not set
# CONFIG_CORTINA_PHY is not set
# CONFIG_DAVICOM_PHY is not set
# CONFIG_ICPLUS_PHY is not set
# CONFIG_LXT_PHY is not set
# CONFIG_INTEL_XWAY_PHY is not set
# CONFIG_LSI_ET1011C_PHY is not set
# CONFIG_MARVELL_PHY is not set
# CONFIG_MARVELL_10G_PHY is not set
# CONFIG_MARVELL_88Q2XXX_PHY is not set
# CONFIG_MARVELL_88X2222_PHY is not set
# CONFIG_MAXLINEAR_GPHY is not set
# CONFIG_MEDIATEK_GE_PHY is not set
CONFIG_MICREL_PHY=y
# CONFIG_MICROCHIP_T1S_PHY is not set
# CONFIG_MICROCHIP_PHY is not set
# CONFIG_MICROCHIP_T1_PHY is not set
# CONFIG_MICROSEMI_PHY is not set
# CONFIG_MOTORCOMM_PHY is not set
# CONFIG_NATIONAL_PHY is not set
# CONFIG_NXP_CBTX_PHY is not set
# CONFIG_NXP_C45_TJA11XX_PHY is not set
# CONFIG_NCN26000_PHY is not set
# CONFIG_QCA83XX_PHY is not set
# CONFIG_QCA808X_PHY is not set
# CONFIG_QCA807X_PHY is not set
# CONFIG_QSEMI_PHY is not set
# CONFIG_REALTEK_PHY is not set
# CONFIG_RENESAS_PHY is not set
# CONFIG_ROCKCHIP_PHY is not set
# CONFIG_SMSC_PHY is not set
# CONFIG_STE10XP is not set
# CONFIG_TERANETICS_PHY is not set
# CONFIG_DP83822_PHY is not set
# CONFIG_DP83TC811_PHY is not set
# CONFIG_DP83848_PHY is not set
# CONFIG_DP83867_PHY is not set
# CONFIG_DP83869_PHY is not set
# CONFIG_DP83TD510_PHY is not set
# CONFIG_DP83TG720_PHY is not set
# CONFIG_VITESSE_PHY is not set
# CONFIG_XILINX_GMII2RGMII is not set
CONFIG_MDIO_DEVICE=y
CONFIG_MDIO_BUS=y
CONFIG_FWNODE_MDIO=y
CONFIG_OF_MDIO=y
CONFIG_MDIO_DEVRES=y
# CONFIG_MDIO_BITBANG is not set
# CONFIG_MDIO_BCM_UNIMAC is not set
# CONFIG_MDIO_HISI_FEMAC is not set
# CONFIG_MDIO_IPQ4019 is not set

#
# MDIO Multiplexers
#
# CONFIG_MDIO_BUS_MUX_GPIO is not set
# CONFIG_MDIO_BUS_MUX_MULTIPLEXER is not set
# CONFIG_MDIO_BUS_MUX_MMIOREG is not set

#
# PCS device drivers
#
# end of PCS device drivers

# CONFIG_PPP is not set
# CONFIG_SLIP is not set

#
# Host-side USB support is needed for USB Network Adapter support
#
# CONFIG_WLAN is not set
# CONFIG_WAN is not set

#
# Wireless WAN
#
# CONFIG_WWAN is not set
# end of Wireless WAN

# CONFIG_NET_FAILOVER is not set
# CONFIG_ISDN is not set

#
# Input device support
#
# CONFIG_INPUT is not set

#
# Hardware I/O ports
#
# CONFIG_SERIO is not set
# CONFIG_GAMEPORT is not set
# end of Hardware I/O ports
# end of Input device support

#
# Character devices
#
CONFIG_TTY=y
# CONFIG_VT is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set
CONFIG_LEGACY_TIOCSTI=y
CONFIG_LDISC_AUTOLOAD=y

#
# Serial drivers
#
CONFIG_SERIAL_EARLYCON=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_DEPRECATED_OPTIONS=y
CONFIG_SERIAL_8250_16550A_VARIANTS=y
# CONFIG_SERIAL_8250_FINTEK is not set
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
# CONFIG_SERIAL_8250_EXTENDED is not set
# CONFIG_SERIAL_8250_DW is not set
# CONFIG_SERIAL_8250_RT288X is not set
CONFIG_SERIAL_OF_PLATFORM=y

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_UARTLITE is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_SIFIVE is not set
# CONFIG_SERIAL_SCCNXP is not set
# CONFIG_SERIAL_SC16IS7XX_CORE is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_XILINX_PS_UART is not set
# CONFIG_SERIAL_ARC is not set
# CONFIG_SERIAL_FSL_LPUART is not set
# CONFIG_SERIAL_FSL_LINFLEXUART is not set
# CONFIG_SERIAL_CONEXANT_DIGICOLOR is not set
# CONFIG_SERIAL_SPRD is not set
# end of Serial drivers

CONFIG_SERIAL_MCTRL_GPIO=y
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_N_GSM is not set
# CONFIG_NULL_TTY is not set
# CONFIG_SERIAL_DEV_BUS is not set
# CONFIG_TTY_PRINTK is not set
# CONFIG_VIRTIO_CONSOLE is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
CONFIG_DEVMEM=y
# CONFIG_TCG_TPM is not set
# CONFIG_XILLYBUS is not set
# end of Character devices

#
# I2C support
#
# CONFIG_I2C is not set
# end of I2C support

# CONFIG_I3C is not set
# CONFIG_SPI is not set
# CONFIG_SPMI is not set
# CONFIG_HSI is not set
CONFIG_PPS=y
# CONFIG_PPS_DEBUG is not set

#
# PPS clients support
#
# CONFIG_PPS_CLIENT_KTIMER is not set
# CONFIG_PPS_CLIENT_LDISC is not set
# CONFIG_PPS_CLIENT_GPIO is not set

#
# PPS generators support
#

#
# PTP clock support
#
CONFIG_PTP_1588_CLOCK=y
CONFIG_PTP_1588_CLOCK_OPTIONAL=y

#
# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
#
# CONFIG_PTP_1588_CLOCK_MOCK is not set
# end of PTP clock support

# CONFIG_PINCTRL is not set
CONFIG_GPIOLIB=y
CONFIG_GPIOLIB_FASTPATH_LIMIT=512
CONFIG_OF_GPIO=y
# CONFIG_DEBUG_GPIO is not set
# CONFIG_GPIO_SYSFS is not set
CONFIG_GPIO_CDEV=y
CONFIG_GPIO_CDEV_V1=y

#
# Memory mapped GPIO drivers
#
# CONFIG_GPIO_74XX_MMIO is not set
# CONFIG_GPIO_ALTERA is not set
# CONFIG_GPIO_CADENCE is not set
# CONFIG_GPIO_DWAPB is not set
# CONFIG_GPIO_FTGPIO010 is not set
# CONFIG_GPIO_GENERIC_PLATFORM is not set
# CONFIG_GPIO_GRGPIO is not set
# CONFIG_GPIO_HLWD is not set
# CONFIG_GPIO_MB86S7X is not set
# CONFIG_GPIO_SIFIVE is not set
# CONFIG_GPIO_XILINX is not set
# CONFIG_GPIO_AMD_FCH is not set
# end of Memory mapped GPIO drivers

#
# MFD GPIO expanders
#
# end of MFD GPIO expanders

#
# Virtual GPIO drivers
#
# CONFIG_GPIO_AGGREGATOR is not set
# CONFIG_GPIO_LATCH is not set
# CONFIG_GPIO_MOCKUP is not set
# CONFIG_GPIO_SIM is not set
# end of Virtual GPIO drivers

# CONFIG_W1 is not set
# CONFIG_POWER_RESET is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
# CONFIG_THERMAL is not set
# CONFIG_WATCHDOG is not set
CONFIG_SSB_POSSIBLE=y
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y
# CONFIG_BCMA is not set

#
# Multifunction device drivers
#
# CONFIG_MFD_ATMEL_FLEXCOM is not set
# CONFIG_MFD_ATMEL_HLCDC is not set
# CONFIG_MFD_MADERA is not set
# CONFIG_MFD_HI6421_PMIC is not set
# CONFIG_MFD_KEMPLD is not set
# CONFIG_MFD_MT6397 is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_MFD_SYSCON is not set
# CONFIG_MFD_TQMX86 is not set
# end of Multifunction device drivers

# CONFIG_REGULATOR is not set

#
# CEC support
#
# CONFIG_MEDIA_CEC_SUPPORT is not set
# end of CEC support

# CONFIG_MEDIA_SUPPORT is not set

#
# Graphics support
#
# CONFIG_AUXDISPLAY is not set
# CONFIG_DRM is not set

#
# Frame buffer Devices
#
# CONFIG_FB is not set
# end of Frame buffer Devices

#
# Backlight & LCD device support
#
# CONFIG_LCD_CLASS_DEVICE is not set
# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
# end of Backlight & LCD device support
# end of Graphics support

# CONFIG_SOUND is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
# CONFIG_USB_SUPPORT is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
# CONFIG_ACCESSIBILITY is not set
# CONFIG_INFINIBAND is not set
# CONFIG_RTC_CLASS is not set
# CONFIG_DMADEVICES is not set

#
# DMABUF options
#
# CONFIG_SYNC_FILE is not set
# CONFIG_DMABUF_HEAPS is not set
# end of DMABUF options

# CONFIG_UIO is not set
# CONFIG_VFIO is not set
# CONFIG_VIRT_DRIVERS is not set
CONFIG_VIRTIO_MENU=y
# CONFIG_VIRTIO_MMIO is not set
# CONFIG_VDPA is not set
CONFIG_VHOST_MENU=y
# CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set

#
# Microsoft Hyper-V guest support
#
# end of Microsoft Hyper-V guest support

# CONFIG_GREYBUS is not set
# CONFIG_COMEDI is not set
# CONFIG_STAGING is not set
# CONFIG_GOLDFISH is not set
CONFIG_HAVE_CLK=y
CONFIG_HAVE_CLK_PREPARE=y
CONFIG_COMMON_CLK=y
# CONFIG_COMMON_CLK_AXI_CLKGEN is not set
# CONFIG_COMMON_CLK_FIXED_MMIO is not set
# CONFIG_XILINX_VCU is not set
# CONFIG_COMMON_CLK_XLNX_CLKWZRD is not set
# CONFIG_HWSPINLOCK is not set

#
# Clock Source drivers
#
# end of Clock Source drivers

# CONFIG_MAILBOX is not set
CONFIG_IOMMU_SUPPORT=y

#
# Generic IOMMU Pagetable Support
#
# end of Generic IOMMU Pagetable Support

# CONFIG_IOMMUFD is not set

#
# Remoteproc drivers
#
# CONFIG_REMOTEPROC is not set
# end of Remoteproc drivers

#
# Rpmsg drivers
#
# CONFIG_RPMSG_VIRTIO is not set
# end of Rpmsg drivers

# CONFIG_SOUNDWIRE is not set

#
# SOC (System On Chip) specific Drivers
#

#
# Amlogic SoC drivers
#
# end of Amlogic SoC drivers

#
# Broadcom SoC drivers
#
# end of Broadcom SoC drivers

#
# NXP/Freescale QorIQ SoC drivers
#
# end of NXP/Freescale QorIQ SoC drivers

#
# fujitsu SoC drivers
#
# end of fujitsu SoC drivers

#
# i.MX SoC drivers
#
# end of i.MX SoC drivers

#
# Enable LiteX SoC Builder specific drivers
#
# CONFIG_LITEX_SOC_CONTROLLER is not set
# end of Enable LiteX SoC Builder specific drivers

# CONFIG_WPCM450_SOC is not set

#
# Qualcomm SoC drivers
#
# end of Qualcomm SoC drivers

# CONFIG_SOC_TI is not set

#
# Xilinx SoC drivers
#
# end of Xilinx SoC drivers
# end of SOC (System On Chip) specific Drivers

#
# PM Domains
#

#
# Amlogic PM Domains
#
# end of Amlogic PM Domains

#
# Broadcom PM Domains
#
# end of Broadcom PM Domains

#
# i.MX PM Domains
#
# end of i.MX PM Domains

#
# Qualcomm PM Domains
#
# end of Qualcomm PM Domains
# end of PM Domains

# CONFIG_PM_DEVFREQ is not set
# CONFIG_EXTCON is not set
# CONFIG_MEMORY is not set
# CONFIG_IIO is not set
# CONFIG_PWM is not set

#
# IRQ chip support
#
CONFIG_IRQCHIP=y
# CONFIG_AL_FIC is not set
CONFIG_OR1K_PIC=y
# CONFIG_XILINX_INTC is not set
# end of IRQ chip support

# CONFIG_IPACK_BUS is not set
# CONFIG_RESET_CONTROLLER is not set

#
# PHY Subsystem
#
# CONFIG_GENERIC_PHY is not set
# CONFIG_PHY_CAN_TRANSCEIVER is not set

#
# PHY drivers for Broadcom platforms
#
# CONFIG_BCM_KONA_USB2_PHY is not set
# end of PHY drivers for Broadcom platforms

# CONFIG_PHY_CADENCE_TORRENT is not set
# CONFIG_PHY_CADENCE_DPHY is not set
# CONFIG_PHY_CADENCE_DPHY_RX is not set
# CONFIG_PHY_CADENCE_SALVO is not set
# CONFIG_PHY_PXA_28NM_HSIC is not set
# CONFIG_PHY_PXA_28NM_USB2 is not set
# end of PHY Subsystem

# CONFIG_POWERCAP is not set
# CONFIG_MCB is not set
# CONFIG_RAS is not set

#
# Android
#
# CONFIG_ANDROID_BINDER_IPC is not set
# end of Android

# CONFIG_DAX is not set
# CONFIG_NVMEM is not set

#
# HW tracing support
#
# CONFIG_STM is not set
# CONFIG_INTEL_TH is not set
# end of HW tracing support

# CONFIG_FPGA is not set
# CONFIG_FSI is not set
# CONFIG_SIOX is not set
# CONFIG_SLIMBUS is not set
# CONFIG_INTERCONNECT is not set
# CONFIG_COUNTER is not set
# CONFIG_PECI is not set
# CONFIG_HTE is not set
# end of Device Drivers

#
# File systems
#
# CONFIG_VALIDATE_FS_PARSER is not set
CONFIG_EXPORTFS=y
# CONFIG_EXPORTFS_BLOCK_OPS is not set
CONFIG_FILE_LOCKING=y
# CONFIG_FS_ENCRYPTION is not set
# CONFIG_FS_VERITY is not set
CONFIG_FSNOTIFY=y
# CONFIG_DNOTIFY is not set
CONFIG_INOTIFY_USER=y
# CONFIG_FANOTIFY is not set
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_FUSE_FS is not set
# CONFIG_OVERLAY_FS is not set

#
# Caches
#
# end of Caches

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
# CONFIG_PROC_KCORE is not set
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
# CONFIG_PROC_CHILDREN is not set
CONFIG_KERNFS=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_TMPFS_XATTR is not set
# CONFIG_TMPFS_QUOTA is not set
# CONFIG_CONFIGFS_FS is not set
# end of Pseudo filesystems

CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ORANGEFS_FS is not set
# CONFIG_CRAMFS is not set
# CONFIG_PSTORE is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
# CONFIG_NFS_V2 is not set
CONFIG_NFS_V3=y
# CONFIG_NFS_V3_ACL is not set
# CONFIG_NFS_V4 is not set
CONFIG_NFS_DISABLE_UDP_SUPPORT=y
# CONFIG_NFSD is not set
CONFIG_GRACE_PERIOD=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=y
CONFIG_RPCSEC_GSS_KRB5=y
CONFIG_RPCSEC_GSS_KRB5_ENCTYPES_AES_SHA1=y
# CONFIG_RPCSEC_GSS_KRB5_ENCTYPES_AES_SHA2 is not set
# CONFIG_SUNRPC_DEBUG is not set
# CONFIG_CEPH_FS is not set
# CONFIG_CIFS is not set
# CONFIG_SMB_SERVER is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
# CONFIG_NLS is not set
# CONFIG_UNICODE is not set
CONFIG_IO_WQ=y
# end of File systems

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
# CONFIG_HARDENED_USERCOPY is not set
# CONFIG_STATIC_USERMODEHELPER is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_LSM="landlock,lockdown,yama,loadpin,safesetid,bpf"

#
# Kernel hardening options
#

#
# Memory initialization
#
CONFIG_CC_HAS_AUTO_VAR_INIT_PATTERN=y
CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_BARE=y
CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO=y
# CONFIG_INIT_STACK_NONE is not set
# CONFIG_INIT_STACK_ALL_PATTERN is not set
CONFIG_INIT_STACK_ALL_ZERO=y
# CONFIG_INIT_ON_ALLOC_DEFAULT_ON is not set
# CONFIG_INIT_ON_FREE_DEFAULT_ON is not set
# CONFIG_INIT_MLOCKED_ON_FREE_DEFAULT_ON is not set
CONFIG_CC_HAS_ZERO_CALL_USED_REGS=y
# CONFIG_ZERO_CALL_USED_REGS is not set
# end of Memory initialization

#
# Hardening of kernel data structures
#
# CONFIG_LIST_HARDENED is not set
# CONFIG_BUG_ON_DATA_CORRUPTION is not set
# end of Hardening of kernel data structures

CONFIG_RANDSTRUCT_NONE=y
# end of Kernel hardening options
# end of Security options

CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD=m
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_SIG2=y
CONFIG_CRYPTO_SKCIPHER=y
CONFIG_CRYPTO_SKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_AKCIPHER2=y
CONFIG_CRYPTO_KPP2=y
CONFIG_CRYPTO_ACOMP2=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
# CONFIG_CRYPTO_USER is not set
CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
CONFIG_CRYPTO_NULL=m
CONFIG_CRYPTO_NULL2=m
# CONFIG_CRYPTO_CRYPTD is not set
CONFIG_CRYPTO_AUTHENC=m
# CONFIG_CRYPTO_TEST is not set
# end of Crypto core or helper

#
# Public-key cryptography
#
# CONFIG_CRYPTO_RSA is not set
# CONFIG_CRYPTO_DH is not set
# CONFIG_CRYPTO_ECDH is not set
# CONFIG_CRYPTO_ECDSA is not set
# CONFIG_CRYPTO_ECRDSA is not set
# CONFIG_CRYPTO_SM2 is not set
# CONFIG_CRYPTO_CURVE25519 is not set
# end of Public-key cryptography

#
# Block ciphers
#
CONFIG_CRYPTO_AES=m
# CONFIG_CRYPTO_AES_TI is not set
# CONFIG_CRYPTO_ARIA is not set
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
# CONFIG_CRYPTO_DES is not set
# CONFIG_CRYPTO_FCRYPT is not set
# CONFIG_CRYPTO_SERPENT is not set
CONFIG_CRYPTO_SM4=m
CONFIG_CRYPTO_SM4_GENERIC=m
# CONFIG_CRYPTO_TWOFISH is not set
# end of Block ciphers

#
# Length-preserving ciphers and modes
#
# CONFIG_CRYPTO_ADIANTUM is not set
CONFIG_CRYPTO_CHACHA20=m
CONFIG_CRYPTO_CBC=m
CONFIG_CRYPTO_CTR=m
CONFIG_CRYPTO_CTS=m
CONFIG_CRYPTO_ECB=y
# CONFIG_CRYPTO_HCTR2 is not set
# CONFIG_CRYPTO_KEYWRAP is not set
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_PCBC is not set
CONFIG_CRYPTO_XTS=m
# end of Length-preserving ciphers and modes

#
# AEAD (authenticated encryption with associated data) ciphers
#
# CONFIG_CRYPTO_AEGIS128 is not set
# CONFIG_CRYPTO_CHACHA20POLY1305 is not set
CONFIG_CRYPTO_CCM=m
CONFIG_CRYPTO_GCM=m
# CONFIG_CRYPTO_SEQIV is not set
# CONFIG_CRYPTO_ECHAINIV is not set
# CONFIG_CRYPTO_ESSIV is not set
# end of AEAD (authenticated encryption with associated data) ciphers

#
# Hashes, digests, and MACs
#
# CONFIG_CRYPTO_BLAKE2B is not set
CONFIG_CRYPTO_CMAC=m
CONFIG_CRYPTO_GHASH=m
CONFIG_CRYPTO_HMAC=m
# CONFIG_CRYPTO_MD4 is not set
CONFIG_CRYPTO_MD5=m
CONFIG_CRYPTO_MICHAEL_MIC=m
# CONFIG_CRYPTO_POLY1305 is not set
# CONFIG_CRYPTO_RMD160 is not set
CONFIG_CRYPTO_SHA1=m
CONFIG_CRYPTO_SHA256=m
CONFIG_CRYPTO_SHA512=m
# CONFIG_CRYPTO_SHA3 is not set
# CONFIG_CRYPTO_SM3_GENERIC is not set
# CONFIG_CRYPTO_STREEBOG is not set
# CONFIG_CRYPTO_VMAC is not set
# CONFIG_CRYPTO_WP512 is not set
CONFIG_CRYPTO_XCBC=m
# CONFIG_CRYPTO_XXHASH is not set
# end of Hashes, digests, and MACs

#
# CRCs (cyclic redundancy checks)
#
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_CRC32 is not set
# CONFIG_CRYPTO_CRCT10DIF is not set
# end of CRCs (cyclic redundancy checks)

#
# Compression
#
# CONFIG_CRYPTO_DEFLATE is not set
# CONFIG_CRYPTO_LZO is not set
# CONFIG_CRYPTO_842 is not set
# CONFIG_CRYPTO_LZ4 is not set
# CONFIG_CRYPTO_LZ4HC is not set
# CONFIG_CRYPTO_ZSTD is not set
# end of Compression

#
# Random number generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
# CONFIG_CRYPTO_DRBG_MENU is not set
# CONFIG_CRYPTO_JITTERENTROPY is not set
# end of Random number generation

#
# Userspace interface
#
# CONFIG_CRYPTO_USER_API_HASH is not set
# CONFIG_CRYPTO_USER_API_SKCIPHER is not set
# CONFIG_CRYPTO_USER_API_RNG is not set
# CONFIG_CRYPTO_USER_API_AEAD is not set
# end of Userspace interface

CONFIG_CRYPTO_HW=y
# CONFIG_CRYPTO_DEV_SAFEXCEL is not set
# CONFIG_CRYPTO_DEV_CCREE is not set
# CONFIG_CRYPTO_DEV_AMLOGIC_GXL is not set

#
# Certificates for signature checking
#
# end of Certificates for signature checking

#
# Library routines
#
# CONFIG_PACKING is not set
CONFIG_BITREVERSE=y
CONFIG_GENERIC_STRNCPY_FROM_USER=y
CONFIG_GENERIC_STRNLEN_USER=y
CONFIG_GENERIC_NET_UTILS=y
# CONFIG_CORDIC is not set
# CONFIG_PRIME_NUMBERS is not set
CONFIG_RATIONAL=y

#
# Crypto library routines
#
CONFIG_CRYPTO_LIB_UTILS=y
CONFIG_CRYPTO_LIB_AES=m
CONFIG_CRYPTO_LIB_GF128MUL=m
CONFIG_CRYPTO_LIB_BLAKE2S_GENERIC=y
CONFIG_CRYPTO_LIB_CHACHA_GENERIC=m
# CONFIG_CRYPTO_LIB_CHACHA is not set
# CONFIG_CRYPTO_LIB_CURVE25519 is not set
CONFIG_CRYPTO_LIB_POLY1305_RSIZE=1
# CONFIG_CRYPTO_LIB_POLY1305 is not set
# CONFIG_CRYPTO_LIB_CHACHA20POLY1305 is not set
CONFIG_CRYPTO_LIB_SHA1=y
CONFIG_CRYPTO_LIB_SHA256=y
# end of Crypto library routines

# CONFIG_CRC_CCITT is not set
# CONFIG_CRC16 is not set
# CONFIG_CRC_T10DIF is not set
# CONFIG_CRC64_ROCKSOFT is not set
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
# CONFIG_CRC32_SELFTEST is not set
CONFIG_CRC32_SLICEBY8=y
# CONFIG_CRC32_SLICEBY4 is not set
# CONFIG_CRC32_SARWATE is not set
# CONFIG_CRC32_BIT is not set
# CONFIG_CRC64 is not set
# CONFIG_CRC4 is not set
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
# CONFIG_CRC8 is not set
CONFIG_XXHASH=y
# CONFIG_RANDOM32_SELFTEST is not set
CONFIG_LZO_DECOMPRESS=y
CONFIG_LZ4_DECOMPRESS=y
CONFIG_ZSTD_COMMON=y
CONFIG_ZSTD_DECOMPRESS=y
CONFIG_XZ_DEC=y
CONFIG_XZ_DEC_X86=y
CONFIG_XZ_DEC_POWERPC=y
CONFIG_XZ_DEC_ARM=y
CONFIG_XZ_DEC_ARMTHUMB=y
CONFIG_XZ_DEC_SPARC=y
# CONFIG_XZ_DEC_MICROLZMA is not set
CONFIG_XZ_DEC_BCJ=y
# CONFIG_XZ_DEC_TEST is not set
CONFIG_DECOMPRESS_BZIP2=y
CONFIG_DECOMPRESS_LZMA=y
CONFIG_DECOMPRESS_XZ=y
CONFIG_DECOMPRESS_LZO=y
CONFIG_DECOMPRESS_LZ4=y
CONFIG_DECOMPRESS_ZSTD=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_DMA=y
CONFIG_DMA_DECLARE_COHERENT=y
CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE=y
CONFIG_DMA_NEED_SYNC=y
# CONFIG_DMA_API_DEBUG is not set
CONFIG_SGL_ALLOC=y
CONFIG_DQL=y
CONFIG_NLATTR=y
CONFIG_GENERIC_ATOMIC64=y
# CONFIG_IRQ_POLL is not set
CONFIG_LIBFDT=y
CONFIG_OID_REGISTRY=y
# CONFIG_LWQ_TEST is not set
# end of Library routines

CONFIG_GENERIC_IOREMAP=y

#
# Kernel hacking
#

#
# printk and dmesg options
#
# CONFIG_PRINTK_TIME is not set
# CONFIG_PRINTK_CALLER is not set
# CONFIG_STACKTRACE_BUILD_ID is not set
CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
CONFIG_CONSOLE_LOGLEVEL_QUIET=4
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
# CONFIG_DYNAMIC_DEBUG is not set
# CONFIG_DYNAMIC_DEBUG_CORE is not set
CONFIG_SYMBOLIC_ERRNAME=y
# end of printk and dmesg options

CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_MISC=y

#
# Compile-time checks and compiler options
#
CONFIG_AS_HAS_NON_CONST_ULEB128=y
CONFIG_DEBUG_INFO_NONE=y
# CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT is not set
# CONFIG_DEBUG_INFO_DWARF4 is not set
# CONFIG_DEBUG_INFO_DWARF5 is not set
CONFIG_FRAME_WARN=1024
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_READABLE_ASM is not set
# CONFIG_HEADERS_INSTALL is not set
CONFIG_DEBUG_SECTION_MISMATCH=y
CONFIG_SECTION_MISMATCH_WARN_ONLY=y
CONFIG_ARCH_WANT_FRAME_POINTERS=y
CONFIG_FRAME_POINTER=y
# CONFIG_VMLINUX_MAP is not set
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
# end of Compile-time checks and compiler options

#
# Generic Kernel Debugging Instruments
#
# CONFIG_MAGIC_SYSRQ is not set
# CONFIG_DEBUG_FS is not set
CONFIG_HAVE_KCSAN_COMPILER=y
# end of Generic Kernel Debugging Instruments

#
# Networking Debugging
#
# CONFIG_NET_DEV_REFCNT_TRACKER is not set
# CONFIG_NET_NS_REFCNT_TRACKER is not set
# CONFIG_DEBUG_NET is not set
# end of Networking Debugging

#
# Memory Debugging
#
# CONFIG_PAGE_EXTENSION is not set
# CONFIG_DEBUG_PAGEALLOC is not set
# CONFIG_PAGE_OWNER is not set
# CONFIG_PAGE_POISONING is not set
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_SCHED_STACK_END_CHECK is not set
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_MEMORY_INIT is not set
CONFIG_HAVE_DEBUG_STACKOVERFLOW=y
# CONFIG_DEBUG_STACKOVERFLOW is not set
# CONFIG_MEM_ALLOC_PROFILING is not set
CONFIG_CC_HAS_WORKING_NOSANITIZE_ADDRESS=y
# end of Memory Debugging

# CONFIG_DEBUG_SHIRQ is not set

#
# Debug Oops, Lockups and Hangs
#
# CONFIG_PANIC_ON_OOPS is not set
CONFIG_PANIC_ON_OOPS_VALUE=0
CONFIG_PANIC_TIMEOUT=0
# CONFIG_SOFTLOCKUP_DETECTOR is not set
# CONFIG_DETECT_HUNG_TASK is not set
# CONFIG_WQ_WATCHDOG is not set
# CONFIG_WQ_CPU_INTENSIVE_REPORT is not set
# CONFIG_TEST_LOCKUP is not set
# end of Debug Oops, Lockups and Hangs

#
# Scheduler Debugging
#
# CONFIG_SCHEDSTATS is not set
# end of Scheduler Debugging

# CONFIG_DEBUG_TIMEKEEPING is not set

#
# Lock Debugging (spinlocks, mutexes, etc...)
#
CONFIG_LOCK_DEBUGGING_SUPPORT=y
# CONFIG_PROVE_LOCKING is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
# CONFIG_DEBUG_RWSEMS is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_DEBUG_ATOMIC_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
# CONFIG_LOCK_TORTURE_TEST is not set
# CONFIG_WW_MUTEX_SELFTEST is not set
# CONFIG_SCF_TORTURE_TEST is not set
# end of Lock Debugging (spinlocks, mutexes, etc...)

# CONFIG_DEBUG_IRQFLAGS is not set
# CONFIG_STACKTRACE is not set
# CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
# CONFIG_DEBUG_KOBJECT is not set

#
# Debug kernel data structures
#
# CONFIG_DEBUG_LIST is not set
# CONFIG_DEBUG_PLIST is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
# CONFIG_DEBUG_MAPLE_TREE is not set
# end of Debug kernel data structures

#
# RCU Debugging
#
# CONFIG_RCU_SCALE_TEST is not set
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_RCU_REF_SCALE_TEST is not set
# CONFIG_RCU_TRACE is not set
# CONFIG_RCU_EQS_DEBUG is not set
# end of RCU Debugging

# CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
# CONFIG_LATENCYTOP is not set
CONFIG_TRACING_SUPPORT=y
CONFIG_FTRACE=y
# CONFIG_IRQSOFF_TRACER is not set
# CONFIG_SCHED_TRACER is not set
# CONFIG_HWLAT_TRACER is not set
# CONFIG_OSNOISE_TRACER is not set
# CONFIG_TIMERLAT_TRACER is not set
# CONFIG_ENABLE_DEFAULT_TRACERS is not set
# CONFIG_TRACER_SNAPSHOT is not set
CONFIG_BRANCH_PROFILE_NONE=y
# CONFIG_PROFILE_ANNOTATED_BRANCHES is not set
# CONFIG_PROFILE_ALL_BRANCHES is not set
# CONFIG_SYNTH_EVENTS is not set
# CONFIG_USER_EVENTS is not set
# CONFIG_TRACEPOINT_BENCHMARK is not set
# CONFIG_PREEMPTIRQ_DELAY_TEST is not set
# CONFIG_SAMPLES is not set

#
# openrisc Debugging
#
# end of openrisc Debugging

#
# Kernel Testing and Coverage
#
# CONFIG_KUNIT is not set
# CONFIG_NOTIFIER_ERROR_INJECTION is not set
# CONFIG_FAULT_INJECTION is not set
CONFIG_CC_HAS_SANCOV_TRACE_PC=y
CONFIG_RUNTIME_TESTING_MENU=y
# CONFIG_TEST_DHRY is not set
# CONFIG_TEST_MIN_HEAP is not set
# CONFIG_TEST_DIV64 is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_TEST_REF_TRACKER is not set
# CONFIG_RBTREE_TEST is not set
# CONFIG_REED_SOLOMON_TEST is not set
# CONFIG_INTERVAL_TREE_TEST is not set
# CONFIG_PERCPU_TEST is not set
# CONFIG_ATOMIC64_SELFTEST is not set
# CONFIG_TEST_HEXDUMP is not set
# CONFIG_TEST_KSTRTOX is not set
# CONFIG_TEST_PRINTF is not set
# CONFIG_TEST_SCANF is not set
# CONFIG_TEST_BITMAP is not set
# CONFIG_TEST_UUID is not set
# CONFIG_TEST_XARRAY is not set
# CONFIG_TEST_MAPLE_TREE is not set
# CONFIG_TEST_RHASHTABLE is not set
# CONFIG_TEST_IDA is not set
# CONFIG_TEST_LKM is not set
# CONFIG_TEST_BITOPS is not set
# CONFIG_TEST_VMALLOC is not set
# CONFIG_TEST_USER_COPY is not set
# CONFIG_TEST_BPF is not set
# CONFIG_TEST_BLACKHOLE_DEV is not set
# CONFIG_FIND_BIT_BENCHMARK is not set
# CONFIG_TEST_SYSCTL is not set
# CONFIG_TEST_UDELAY is not set
# CONFIG_TEST_STATIC_KEYS is not set
# CONFIG_TEST_MEMCAT_P is not set
# CONFIG_TEST_MEMINIT is not set
# CONFIG_TEST_FREE_PAGES is not set
# CONFIG_TEST_OBJPOOL is not set
# end of Kernel Testing and Coverage

#
# Rust hacking
#
# end of Rust hacking
# end of Kernel hacking

Re: [PATCH v2 1/2] workqueue: new struct io_work

[Kent Overstreet]

On Mon, Jul 01, 2024 at 07:32:23AM GMT, Tejun Heo wrote:
> Hello,
> 
> On Mon, Jul 01, 2024 at 03:51:37PM +0800, Yi Sun wrote:
> > +/*
> > + * If a work may do disk IO, it is recommended to use struct io_work
> > + * instead of struct work_struct.
> > + */
> > +struct io_work {
> > +	struct work_struct work;
> > +
> > +	/* If the work does submit_bio, io priority may be needed. */
> > +	unsigned short ioprio;
> > +	/* Record kworker's original io priority. */
> > +	unsigned short ori_ioprio;
> > +	/* Whether the work has set io priority? */
> > +	long ioprio_flag;
> > +};
> 
> There are fundamental limitations to this approach in terms of
> prioritization. If you tag each work items with priority and then send them
> to the same workqueue, there's nothing preventing a low priority issuer from
> flooding the workqueue and causing a priority inversion. ie. To solve this
> properly, you need per-issuer-class workqueue so that the concurrency limit
> is not shared across different priorities.
> 
> Now, this limited implementation, while incomplete and easy to defeat, may
> still be useful. After all, ioprio itself, I think, is flawed in the same
> way. If f2fs wants to implement this internally, that's okay, I suppose, but
> as a generic mechanism, I don't think this makes a lot of sense.

And I wonder if the reason for submitting from a workqueue isn't also
priority inversion?

I haven't looked at the f2fs code, but that comes up in bcachefs; we
have IOs that we submit from worqueue context because they're submitted
in contexts where we _really_ cannot block - they're metadata IOs, and
thus also high priority IOs. But if the queue is already full with lower
priority IOs...

perhaps what we need is a bio flag to say "do not block in the
submission path, queue is allowed to exceed normal limits for this (high
priority) IO"

Re: [PATCH v2 1/2] workqueue: new struct io_work

[yi sun]

Yes, adding the io priority attribute to work will bring huge benefits in the
following scenarios:
The system has huge IO pressure (these IOs may all be low-priority IOs),
and a work (we hope to complete quickly) is also doing IO. If this work
does not set IO priority, it will be blocked because it is difficult to get IO
resources. And if this work sets a high IO priority and passes the IO priority
to kworker, then this work will be completed quickly (as we expect).

On Tue, Jul 2, 2024 at 11:53 AM Kent Overstreet
<kent.overstreet@linux.dev> wrote:
>
> On Mon, Jul 01, 2024 at 07:32:23AM GMT, Tejun Heo wrote:
> > Hello,
> >
> > On Mon, Jul 01, 2024 at 03:51:37PM +0800, Yi Sun wrote:
> > > +/*
> > > + * If a work may do disk IO, it is recommended to use struct io_work
> > > + * instead of struct work_struct.
> > > + */
> > > +struct io_work {
> > > +   struct work_struct work;
> > > +
> > > +   /* If the work does submit_bio, io priority may be needed. */
> > > +   unsigned short ioprio;
> > > +   /* Record kworker's original io priority. */
> > > +   unsigned short ori_ioprio;
> > > +   /* Whether the work has set io priority? */
> > > +   long ioprio_flag;
> > > +};
> >
> > There are fundamental limitations to this approach in terms of
> > prioritization. If you tag each work items with priority and then send them
> > to the same workqueue, there's nothing preventing a low priority issuer from
> > flooding the workqueue and causing a priority inversion. ie. To solve this
> > properly, you need per-issuer-class workqueue so that the concurrency limit
> > is not shared across different priorities.
> >
> > Now, this limited implementation, while incomplete and easy to defeat, may
> > still be useful. After all, ioprio itself, I think, is flawed in the same
> > way. If f2fs wants to implement this internally, that's okay, I suppose, but
> > as a generic mechanism, I don't think this makes a lot of sense.
>
> And I wonder if the reason for submitting from a workqueue isn't also
> priority inversion?
>
> I haven't looked at the f2fs code, but that comes up in bcachefs; we
> have IOs that we submit from worqueue context because they're submitted
> in contexts where we _really_ cannot block - they're metadata IOs, and
> thus also high priority IOs. But if the queue is already full with lower
> priority IOs...
>
> perhaps what we need is a bio flag to say "do not block in the
> submission path, queue is allowed to exceed normal limits for this (high
> priority) IO"

Re: [PATCH v2 1/2] workqueue: new struct io_work

[Tejun Heo]

Hello,

On Tue, Jul 02, 2024 at 05:27:19PM +0800, yi sun wrote:
> Yes, adding the io priority attribute to work will bring huge benefits in the
> following scenarios:
> The system has huge IO pressure (these IOs may all be low-priority IOs),
> and a work (we hope to complete quickly) is also doing IO. If this work
> does not set IO priority, it will be blocked because it is difficult to get IO
> resources. And if this work sets a high IO priority and passes the IO priority
> to kworker, then this work will be completed quickly (as we expect).

As I wrote previously, you can still get trapped in a pretty bad priority
inversion whether from workqueue concurrency or queue depth exhaustion. I'm
sure that there's some spectrum of contention conditions that can be helped
with just setting ioprio, but it's a pretty partial solution.

Thanks.

-- 
tejun

Re: [PATCH v2 1/2] workqueue: new struct io_work

[Kent Overstreet]

On Tue, Jul 02, 2024 at 05:27:19PM GMT, yi sun wrote:
> Yes, adding the io priority attribute to work will bring huge benefits in the
> following scenarios:
> The system has huge IO pressure (these IOs may all be low-priority IOs),
> and a work (we hope to complete quickly) is also doing IO. If this work
> does not set IO priority, it will be blocked because it is difficult to get IO
> resources. And if this work sets a high IO priority and passes the IO priority
> to kworker, then this work will be completed quickly (as we expect).

Why are you submitting IO from a workqueue in the first place?

Re: [PATCH v2 1/2] workqueue: new struct io_work

[kernel test robot]

Hi Yi,

kernel test robot noticed the following build errors:

[auto build test ERROR on jaegeuk-f2fs/dev-test]
[also build test ERROR on jaegeuk-f2fs/dev tj-wq/for-next linus/master v6.10-rc6 next-20240702]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Yi-Sun/workqueue-new-struct-io_work/20240701-155343
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev-test
patch link:    https://lore.kernel.org/r/20240701075138.1144575-2-yi.sun%40unisoc.com
patch subject: [PATCH v2 1/2] workqueue: new struct io_work
config: arc-tb10x_defconfig (https://download.01.org/0day-ci/archive/20240703/202407030547.MbODytSE-lkp@intel.com/config)
compiler: arc-elf-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240703/202407030547.MbODytSE-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202407030547.MbODytSE-lkp@intel.com/

All errors (new ones prefixed by >>):

   arc-elf-ld: kernel/workqueue.o: in function `may_adjust_io_work_task_ioprio':
   kernel/workqueue.c:2682:(.text+0xbb0): undefined reference to `set_task_ioprio'
>> arc-elf-ld: kernel/workqueue.c:2682:(.text+0xbb0): undefined reference to `set_task_ioprio'
   arc-elf-ld: kernel/workqueue.o: in function `restore_io_work_task_ioprio':
   kernel/workqueue.c:2698:(.text+0xbc8): undefined reference to `set_task_ioprio'
   arc-elf-ld: kernel/workqueue.c:2698:(.text+0xbc8): undefined reference to `set_task_ioprio'

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki