[PATCH v1 04/11] fs/proc/vmcore: move vmcore definitions from kcore.h to crash_dump.h

David Hildenbrand posted 11 patches 1 month ago
[PATCH v1 04/11] fs/proc/vmcore: move vmcore definitions from kcore.h to crash_dump.h
Posted by David Hildenbrand 1 month ago
These defines are not related to /proc/kcore, move them to crash_dump.h
instead. While at it, rename "struct vmcore" to "struct
vmcore_mem_node", which is a more fitting name.

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 fs/proc/vmcore.c           | 20 ++++++++++----------
 include/linux/crash_dump.h | 13 +++++++++++++
 include/linux/kcore.h      | 13 -------------
 3 files changed, 23 insertions(+), 23 deletions(-)

diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 6371dbaa21be..47652df95202 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -304,10 +304,10 @@ static int vmcoredd_mmap_dumps(struct vm_area_struct *vma, unsigned long dst,
  */
 static ssize_t __read_vmcore(struct iov_iter *iter, loff_t *fpos)
 {
+	struct vmcore_mem_node *m = NULL;
 	ssize_t acc = 0, tmp;
 	size_t tsz;
 	u64 start;
-	struct vmcore *m = NULL;
 
 	if (!iov_iter_count(iter) || *fpos >= vmcore_size)
 		return 0;
@@ -560,8 +560,8 @@ static int vmcore_remap_oldmem_pfn(struct vm_area_struct *vma,
 static int mmap_vmcore(struct file *file, struct vm_area_struct *vma)
 {
 	size_t size = vma->vm_end - vma->vm_start;
+	struct vmcore_mem_node *m;
 	u64 start, end, len, tsz;
-	struct vmcore *m;
 
 	start = (u64)vma->vm_pgoff << PAGE_SHIFT;
 	end = start + size;
@@ -683,16 +683,16 @@ static const struct proc_ops vmcore_proc_ops = {
 	.proc_mmap	= mmap_vmcore,
 };
 
-static struct vmcore* __init get_new_element(void)
+static struct vmcore_mem_node * __init get_new_element(void)
 {
-	return kzalloc(sizeof(struct vmcore), GFP_KERNEL);
+	return kzalloc(sizeof(struct vmcore_mem_node), GFP_KERNEL);
 }
 
 static u64 get_vmcore_size(size_t elfsz, size_t elfnotesegsz,
 			   struct list_head *vc_list)
 {
+	struct vmcore_mem_node *m;
 	u64 size;
-	struct vmcore *m;
 
 	size = elfsz + elfnotesegsz;
 	list_for_each_entry(m, vc_list, list) {
@@ -1090,11 +1090,11 @@ static int __init process_ptload_program_headers_elf64(char *elfptr,
 						size_t elfnotes_sz,
 						struct list_head *vc_list)
 {
+	struct vmcore_mem_node *new;
 	int i;
 	Elf64_Ehdr *ehdr_ptr;
 	Elf64_Phdr *phdr_ptr;
 	loff_t vmcore_off;
-	struct vmcore *new;
 
 	ehdr_ptr = (Elf64_Ehdr *)elfptr;
 	phdr_ptr = (Elf64_Phdr*)(elfptr + sizeof(Elf64_Ehdr)); /* PT_NOTE hdr */
@@ -1133,11 +1133,11 @@ static int __init process_ptload_program_headers_elf32(char *elfptr,
 						size_t elfnotes_sz,
 						struct list_head *vc_list)
 {
+	struct vmcore_mem_node *new;
 	int i;
 	Elf32_Ehdr *ehdr_ptr;
 	Elf32_Phdr *phdr_ptr;
 	loff_t vmcore_off;
-	struct vmcore *new;
 
 	ehdr_ptr = (Elf32_Ehdr *)elfptr;
 	phdr_ptr = (Elf32_Phdr*)(elfptr + sizeof(Elf32_Ehdr)); /* PT_NOTE hdr */
@@ -1175,8 +1175,8 @@ static int __init process_ptload_program_headers_elf32(char *elfptr,
 static void set_vmcore_list_offsets(size_t elfsz, size_t elfnotes_sz,
 				    struct list_head *vc_list)
 {
+	struct vmcore_mem_node *m;
 	loff_t vmcore_off;
-	struct vmcore *m;
 
 	/* Skip ELF header, program headers and ELF note segment. */
 	vmcore_off = elfsz + elfnotes_sz;
@@ -1587,9 +1587,9 @@ void vmcore_cleanup(void)
 
 	/* clear the vmcore list. */
 	while (!list_empty(&vmcore_list)) {
-		struct vmcore *m;
+		struct vmcore_mem_node *m;
 
-		m = list_first_entry(&vmcore_list, struct vmcore, list);
+		m = list_first_entry(&vmcore_list, struct vmcore_mem_node, list);
 		list_del(&m->list);
 		kfree(m);
 	}
diff --git a/include/linux/crash_dump.h b/include/linux/crash_dump.h
index acc55626afdc..5e48ab12c12b 100644
--- a/include/linux/crash_dump.h
+++ b/include/linux/crash_dump.h
@@ -114,10 +114,23 @@ struct vmcore_cb {
 extern void register_vmcore_cb(struct vmcore_cb *cb);
 extern void unregister_vmcore_cb(struct vmcore_cb *cb);
 
+struct vmcore_mem_node {
+	struct list_head list;
+	unsigned long long paddr;
+	unsigned long long size;
+	loff_t offset;
+};
+
 #else /* !CONFIG_CRASH_DUMP */
 static inline bool is_kdump_kernel(void) { return false; }
 #endif /* CONFIG_CRASH_DUMP */
 
+struct vmcoredd_node {
+	struct list_head list;	/* List of dumps */
+	void *buf;		/* Buffer containing device's dump */
+	unsigned int size;	/* Size of the buffer */
+};
+
 /* Device Dump information to be filled by drivers */
 struct vmcoredd_data {
 	char dump_name[VMCOREDD_MAX_NAME_BYTES]; /* Unique name of the dump */
diff --git a/include/linux/kcore.h b/include/linux/kcore.h
index 86c0f1d18998..9a2fa013c91d 100644
--- a/include/linux/kcore.h
+++ b/include/linux/kcore.h
@@ -20,19 +20,6 @@ struct kcore_list {
 	int type;
 };
 
-struct vmcore {
-	struct list_head list;
-	unsigned long long paddr;
-	unsigned long long size;
-	loff_t offset;
-};
-
-struct vmcoredd_node {
-	struct list_head list;	/* List of dumps */
-	void *buf;		/* Buffer containing device's dump */
-	unsigned int size;	/* Size of the buffer */
-};
-
 #ifdef CONFIG_PROC_KCORE
 void __init kclist_add(struct kcore_list *, void *, size_t, int type);
 
-- 
2.46.1
Re: [PATCH v1 04/11] fs/proc/vmcore: move vmcore definitions from kcore.h to crash_dump.h
Posted by Baoquan He 1 week, 3 days ago
On 10/25/24 at 05:11pm, David Hildenbrand wrote:
> These defines are not related to /proc/kcore, move them to crash_dump.h
> instead. While at it, rename "struct vmcore" to "struct
> vmcore_mem_node", which is a more fitting name.

Agree it's inappropriate to put the defintions in kcore.h. However for
'struct vmcore', it's only used in fs/proc/vmcore.c from my code
serching, do you think if we can put it in fs/proc/vmcore.c directly?
And 'struct vmcoredd_node' too.

And about the renaming, with my understanding each instance of struct
vmcore represents one memory region, isn't it a little confusing to be
called vmcore_mem_node? I understand you probablly want to unify the
vmcore and vmcoredd's naming. I have to admit I don't know vmcoredd well
and its naming, while most of people have been knowing vmcore representing
memory region very well.

> 
> Signed-off-by: David Hildenbrand <david@redhat.com>
> ---
>  fs/proc/vmcore.c           | 20 ++++++++++----------
>  include/linux/crash_dump.h | 13 +++++++++++++
>  include/linux/kcore.h      | 13 -------------
>  3 files changed, 23 insertions(+), 23 deletions(-)
> 
> diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
> index 6371dbaa21be..47652df95202 100644
> --- a/fs/proc/vmcore.c
> +++ b/fs/proc/vmcore.c
> @@ -304,10 +304,10 @@ static int vmcoredd_mmap_dumps(struct vm_area_struct *vma, unsigned long dst,
>   */
>  static ssize_t __read_vmcore(struct iov_iter *iter, loff_t *fpos)
>  {
> +	struct vmcore_mem_node *m = NULL;
>  	ssize_t acc = 0, tmp;
>  	size_t tsz;
>  	u64 start;
> -	struct vmcore *m = NULL;
>  
>  	if (!iov_iter_count(iter) || *fpos >= vmcore_size)
>  		return 0;
> @@ -560,8 +560,8 @@ static int vmcore_remap_oldmem_pfn(struct vm_area_struct *vma,
>  static int mmap_vmcore(struct file *file, struct vm_area_struct *vma)
>  {
>  	size_t size = vma->vm_end - vma->vm_start;
> +	struct vmcore_mem_node *m;
>  	u64 start, end, len, tsz;
> -	struct vmcore *m;
>  
>  	start = (u64)vma->vm_pgoff << PAGE_SHIFT;
>  	end = start + size;
> @@ -683,16 +683,16 @@ static const struct proc_ops vmcore_proc_ops = {
>  	.proc_mmap	= mmap_vmcore,
>  };
>  
> -static struct vmcore* __init get_new_element(void)
> +static struct vmcore_mem_node * __init get_new_element(void)
>  {
> -	return kzalloc(sizeof(struct vmcore), GFP_KERNEL);
> +	return kzalloc(sizeof(struct vmcore_mem_node), GFP_KERNEL);
>  }
>  
>  static u64 get_vmcore_size(size_t elfsz, size_t elfnotesegsz,
>  			   struct list_head *vc_list)
>  {
> +	struct vmcore_mem_node *m;
>  	u64 size;
> -	struct vmcore *m;
>  
>  	size = elfsz + elfnotesegsz;
>  	list_for_each_entry(m, vc_list, list) {
> @@ -1090,11 +1090,11 @@ static int __init process_ptload_program_headers_elf64(char *elfptr,
>  						size_t elfnotes_sz,
>  						struct list_head *vc_list)
>  {
> +	struct vmcore_mem_node *new;
>  	int i;
>  	Elf64_Ehdr *ehdr_ptr;
>  	Elf64_Phdr *phdr_ptr;
>  	loff_t vmcore_off;
> -	struct vmcore *new;
>  
>  	ehdr_ptr = (Elf64_Ehdr *)elfptr;
>  	phdr_ptr = (Elf64_Phdr*)(elfptr + sizeof(Elf64_Ehdr)); /* PT_NOTE hdr */
> @@ -1133,11 +1133,11 @@ static int __init process_ptload_program_headers_elf32(char *elfptr,
>  						size_t elfnotes_sz,
>  						struct list_head *vc_list)
>  {
> +	struct vmcore_mem_node *new;
>  	int i;
>  	Elf32_Ehdr *ehdr_ptr;
>  	Elf32_Phdr *phdr_ptr;
>  	loff_t vmcore_off;
> -	struct vmcore *new;
>  
>  	ehdr_ptr = (Elf32_Ehdr *)elfptr;
>  	phdr_ptr = (Elf32_Phdr*)(elfptr + sizeof(Elf32_Ehdr)); /* PT_NOTE hdr */
> @@ -1175,8 +1175,8 @@ static int __init process_ptload_program_headers_elf32(char *elfptr,
>  static void set_vmcore_list_offsets(size_t elfsz, size_t elfnotes_sz,
>  				    struct list_head *vc_list)
>  {
> +	struct vmcore_mem_node *m;
>  	loff_t vmcore_off;
> -	struct vmcore *m;
>  
>  	/* Skip ELF header, program headers and ELF note segment. */
>  	vmcore_off = elfsz + elfnotes_sz;
> @@ -1587,9 +1587,9 @@ void vmcore_cleanup(void)
>  
>  	/* clear the vmcore list. */
>  	while (!list_empty(&vmcore_list)) {
> -		struct vmcore *m;
> +		struct vmcore_mem_node *m;
>  
> -		m = list_first_entry(&vmcore_list, struct vmcore, list);
> +		m = list_first_entry(&vmcore_list, struct vmcore_mem_node, list);
>  		list_del(&m->list);
>  		kfree(m);
>  	}
> diff --git a/include/linux/crash_dump.h b/include/linux/crash_dump.h
> index acc55626afdc..5e48ab12c12b 100644
> --- a/include/linux/crash_dump.h
> +++ b/include/linux/crash_dump.h
> @@ -114,10 +114,23 @@ struct vmcore_cb {
>  extern void register_vmcore_cb(struct vmcore_cb *cb);
>  extern void unregister_vmcore_cb(struct vmcore_cb *cb);
>  
> +struct vmcore_mem_node {
> +	struct list_head list;
> +	unsigned long long paddr;
> +	unsigned long long size;
> +	loff_t offset;
> +};
> +
>  #else /* !CONFIG_CRASH_DUMP */
>  static inline bool is_kdump_kernel(void) { return false; }
>  #endif /* CONFIG_CRASH_DUMP */
>  
> +struct vmcoredd_node {
> +	struct list_head list;	/* List of dumps */
> +	void *buf;		/* Buffer containing device's dump */
> +	unsigned int size;	/* Size of the buffer */
> +};
> +
>  /* Device Dump information to be filled by drivers */
>  struct vmcoredd_data {
>  	char dump_name[VMCOREDD_MAX_NAME_BYTES]; /* Unique name of the dump */
> diff --git a/include/linux/kcore.h b/include/linux/kcore.h
> index 86c0f1d18998..9a2fa013c91d 100644
> --- a/include/linux/kcore.h
> +++ b/include/linux/kcore.h
> @@ -20,19 +20,6 @@ struct kcore_list {
>  	int type;
>  };
>  
> -struct vmcore {
> -	struct list_head list;
> -	unsigned long long paddr;
> -	unsigned long long size;
> -	loff_t offset;
> -};
> -
> -struct vmcoredd_node {
> -	struct list_head list;	/* List of dumps */
> -	void *buf;		/* Buffer containing device's dump */
> -	unsigned int size;	/* Size of the buffer */
> -};
> -
>  #ifdef CONFIG_PROC_KCORE
>  void __init kclist_add(struct kcore_list *, void *, size_t, int type);
>  
> -- 
> 2.46.1
>
Re: [PATCH v1 04/11] fs/proc/vmcore: move vmcore definitions from kcore.h to crash_dump.h
Posted by David Hildenbrand 1 week, 3 days ago
On 15.11.24 10:44, Baoquan He wrote:
> On 10/25/24 at 05:11pm, David Hildenbrand wrote:
>> These defines are not related to /proc/kcore, move them to crash_dump.h
>> instead. While at it, rename "struct vmcore" to "struct
>> vmcore_mem_node", which is a more fitting name.
> 
> Agree it's inappropriate to put the defintions in kcore.h. However for
> 'struct vmcore', it's only used in fs/proc/vmcore.c from my code
> serching, do you think if we can put it in fs/proc/vmcore.c directly?
> And 'struct vmcoredd_node' too.

See the next patches and how virtio-mem will make use of the feactored 
out functions. Not putting them as inline functions into a header will 
require exporting symbols just do add a vmcore memory node to the list, 
which I want to avoid -- overkill for these simple helpers.

> 
> And about the renaming, with my understanding each instance of struct
> vmcore represents one memory region, isn't it a little confusing to be
> called vmcore_mem_node? I understand you probablly want to unify the
> vmcore and vmcoredd's naming. I have to admit I don't know vmcoredd well
> and its naming, while most of people have been knowing vmcore representing
> memory region very well.

I chose "vmcore_mem_node" because it is a memory range stored in a list. 
Note the symmetry with "vmcoredd_node"

If there are strong feelings I can use a different name, but 
"vmcore_mem_node" really describes what it actually is. Especially now 
that we have different vmcore nodes.

-- 
Cheers,

David / dhildenb
Re: [PATCH v1 04/11] fs/proc/vmcore: move vmcore definitions from kcore.h to crash_dump.h
Posted by Baoquan He 5 days, 7 hours ago
On 11/15/24 at 10:59am, David Hildenbrand wrote:
> On 15.11.24 10:44, Baoquan He wrote:
> > On 10/25/24 at 05:11pm, David Hildenbrand wrote:
> > > These defines are not related to /proc/kcore, move them to crash_dump.h
> > > instead. While at it, rename "struct vmcore" to "struct
> > > vmcore_mem_node", which is a more fitting name.
> > 
> > Agree it's inappropriate to put the defintions in kcore.h. However for
> > 'struct vmcore', it's only used in fs/proc/vmcore.c from my code
> > serching, do you think if we can put it in fs/proc/vmcore.c directly?
> > And 'struct vmcoredd_node' too.
> 
> See the next patches and how virtio-mem will make use of the feactored out
> functions. Not putting them as inline functions into a header will require
> exporting symbols just do add a vmcore memory node to the list, which I want
> to avoid -- overkill for these simple helpers.

I see. It makes sense to put them in crash_dump.h. Thanks for
explanation.

> 
> > 
> > And about the renaming, with my understanding each instance of struct
> > vmcore represents one memory region, isn't it a little confusing to be
> > called vmcore_mem_node? I understand you probablly want to unify the
> > vmcore and vmcoredd's naming. I have to admit I don't know vmcoredd well
> > and its naming, while most of people have been knowing vmcore representing
> > memory region very well.
> 
> I chose "vmcore_mem_node" because it is a memory range stored in a list.
> Note the symmetry with "vmcoredd_node"

I would say the justification of naming "vmcore_mem_node" is to keep
symmetry with "vmcoredd_node". If because it is a memory range, it really
should not be called vmcore_mem_node. As we know, memory node has
specific meaning in kernel, it's the memory range existing on a NUMA node.

And vmcoredd is not a widely used feature. At least in fedora/RHEL, we
leave it to customers themselves to use and handle, we don't support it.
And we add 'novmcoredd' to kdump kernel cmdline by default to disable it
in fedora/RHEL. So a rarely used feature should not be taken to decide
the naming of a mature and and widely used feature's name. My personal
opinion.

> 
> If there are strong feelings I can use a different name, but

Yes, I would suggest we better keep the old name or take a more
appropriate one if have to change.

> "vmcore_mem_node" really describes what it actually is. Especially now that
> we have different vmcore nodes.
> 
> -- 
> Cheers,
> 
> David / dhildenb
>
Re: [PATCH v1 04/11] fs/proc/vmcore: move vmcore definitions from kcore.h to crash_dump.h
Posted by David Hildenbrand 5 days, 6 hours ago
On 20.11.24 10:42, Baoquan He wrote:
> On 11/15/24 at 10:59am, David Hildenbrand wrote:
>> On 15.11.24 10:44, Baoquan He wrote:
>>> On 10/25/24 at 05:11pm, David Hildenbrand wrote:
>>>> These defines are not related to /proc/kcore, move them to crash_dump.h
>>>> instead. While at it, rename "struct vmcore" to "struct
>>>> vmcore_mem_node", which is a more fitting name.
>>>
>>> Agree it's inappropriate to put the defintions in kcore.h. However for
>>> 'struct vmcore', it's only used in fs/proc/vmcore.c from my code
>>> serching, do you think if we can put it in fs/proc/vmcore.c directly?
>>> And 'struct vmcoredd_node' too.
>>
>> See the next patches and how virtio-mem will make use of the feactored out
>> functions. Not putting them as inline functions into a header will require
>> exporting symbols just do add a vmcore memory node to the list, which I want
>> to avoid -- overkill for these simple helpers.
> 
> I see. It makes sense to put them in crash_dump.h. Thanks for
> explanation.
> 

I'll add these details to the description.

>>
>>>
>>> And about the renaming, with my understanding each instance of struct
>>> vmcore represents one memory region, isn't it a little confusing to be
>>> called vmcore_mem_node? I understand you probablly want to unify the
>>> vmcore and vmcoredd's naming. I have to admit I don't know vmcoredd well
>>> and its naming, while most of people have been knowing vmcore representing
>>> memory region very well.
>>
>> I chose "vmcore_mem_node" because it is a memory range stored in a list.
>> Note the symmetry with "vmcoredd_node"
> 
> I would say the justification of naming "vmcore_mem_node" is to keep
> symmetry with "vmcoredd_node". If because it is a memory range, it really
> should not be called vmcore_mem_node. As we know, memory node has
> specific meaning in kernel, it's the memory range existing on a NUMA node.
> 
> And vmcoredd is not a widely used feature. At least in fedora/RHEL, we
> leave it to customers themselves to use and handle, we don't support it.
> And we add 'novmcoredd' to kdump kernel cmdline by default to disable it
> in fedora/RHEL. So a rarely used feature should not be taken to decide
> the naming of a mature and and widely used feature's name. My personal
> opinion.

It's a memory range that gets added to a list. So it's a node in a list 
... representing a memory range. :) I don't particularly care about the 
"node" part here.

The old "struct vmcore" name is misleading: makes one believe it somehow 
represents "/proc/vmcore", but it really doesn't. (see below on function 
naming)

> 
>>
>> If there are strong feelings I can use a different name, but
> 
> Yes, I would suggest we better keep the old name or take a more
> appropriate one if have to change.

In light of patch #5 and #6, really only something like 
"vmcore_mem_node" makes sense. Alternatively "vmcore_range" or 
"vmcore_mem_range".

Leaving it as "struct vmcore" would mean that we had to do in #5 and #6:

* vmcore_alloc_add_mem_node() -> vmcore_alloc_add()
* vmcore_free_mem_nodes() -> vmcore_free()

Which would *really* be misleading, because we are not "freeing" the vmcore.

Would "vmcore_range" work for you? Then we could do:

* vmcore_alloc_add_mem_node() -> vmcore_alloc_add_range()
* vmcore_free_mem_nodes() -> vmcore_free_ranges()

-- 
Cheers,

David / dhildenb
Re: [PATCH v1 04/11] fs/proc/vmcore: move vmcore definitions from kcore.h to crash_dump.h
Posted by Baoquan He 4 days, 12 hours ago
On 11/20/24 at 11:28am, David Hildenbrand wrote:
> On 20.11.24 10:42, Baoquan He wrote:
> > On 11/15/24 at 10:59am, David Hildenbrand wrote:
> > > On 15.11.24 10:44, Baoquan He wrote:
> > > > On 10/25/24 at 05:11pm, David Hildenbrand wrote:
> > > > > These defines are not related to /proc/kcore, move them to crash_dump.h
> > > > > instead. While at it, rename "struct vmcore" to "struct
> > > > > vmcore_mem_node", which is a more fitting name.
> > > > 
> > > > Agree it's inappropriate to put the defintions in kcore.h. However for
> > > > 'struct vmcore', it's only used in fs/proc/vmcore.c from my code
> > > > serching, do you think if we can put it in fs/proc/vmcore.c directly?
> > > > And 'struct vmcoredd_node' too.
> > > 
> > > See the next patches and how virtio-mem will make use of the feactored out
> > > functions. Not putting them as inline functions into a header will require
> > > exporting symbols just do add a vmcore memory node to the list, which I want
> > > to avoid -- overkill for these simple helpers.
> > 
> > I see. It makes sense to put them in crash_dump.h. Thanks for
> > explanation.
> > 
> 
> I'll add these details to the description.

Thanks.

> 
> > > 
> > > > 
> > > > And about the renaming, with my understanding each instance of struct
> > > > vmcore represents one memory region, isn't it a little confusing to be
> > > > called vmcore_mem_node? I understand you probablly want to unify the
> > > > vmcore and vmcoredd's naming. I have to admit I don't know vmcoredd well
> > > > and its naming, while most of people have been knowing vmcore representing
> > > > memory region very well.
> > > 
> > > I chose "vmcore_mem_node" because it is a memory range stored in a list.
> > > Note the symmetry with "vmcoredd_node"
> > 
> > I would say the justification of naming "vmcore_mem_node" is to keep
> > symmetry with "vmcoredd_node". If because it is a memory range, it really
> > should not be called vmcore_mem_node. As we know, memory node has
> > specific meaning in kernel, it's the memory range existing on a NUMA node.
> > 
> > And vmcoredd is not a widely used feature. At least in fedora/RHEL, we
> > leave it to customers themselves to use and handle, we don't support it.
> > And we add 'novmcoredd' to kdump kernel cmdline by default to disable it
> > in fedora/RHEL. So a rarely used feature should not be taken to decide
> > the naming of a mature and and widely used feature's name. My personal
> > opinion.
> 
> It's a memory range that gets added to a list. So it's a node in a list ...
> representing a memory range. :) I don't particularly care about the "node"
> part here.

Ah, I missed that about list node. There are list items, list entries
and list nodes, I didn't think of list node at tht time.

> 
> The old "struct vmcore" name is misleading: makes one believe it somehow
> represents "/proc/vmcore", but it really doesn't. (see below on function
> naming)

Yeah, agree. struct vmcore is a concept of the whole logical file.

> 
> > 
> > > 
> > > If there are strong feelings I can use a different name, but
> > 
> > Yes, I would suggest we better keep the old name or take a more
> > appropriate one if have to change.
> 
> In light of patch #5 and #6, really only something like "vmcore_mem_node"
> makes sense. Alternatively "vmcore_range" or "vmcore_mem_range".
> 
> Leaving it as "struct vmcore" would mean that we had to do in #5 and #6:
> 
> * vmcore_alloc_add_mem_node() -> vmcore_alloc_add()
> * vmcore_free_mem_nodes() -> vmcore_free()
> 
> Which would *really* be misleading, because we are not "freeing" the vmcore.
> 
> Would "vmcore_range" work for you? Then we could do:
> 
> * vmcore_alloc_add_mem_node() -> vmcore_alloc_add_range()
> * vmcore_free_mem_nodes() -> vmcore_free_ranges()

Yeah, vmcore_range is better, which won't cause misunderstanding.
Thanks.
Re: [PATCH v1 04/11] fs/proc/vmcore: move vmcore definitions from kcore.h to crash_dump.h
Posted by David Hildenbrand 4 days, 1 hour ago
>>>> If there are strong feelings I can use a different name, but
>>>
>>> Yes, I would suggest we better keep the old name or take a more
>>> appropriate one if have to change.
>>
>> In light of patch #5 and #6, really only something like "vmcore_mem_node"
>> makes sense. Alternatively "vmcore_range" or "vmcore_mem_range".
>>
>> Leaving it as "struct vmcore" would mean that we had to do in #5 and #6:
>>
>> * vmcore_alloc_add_mem_node() -> vmcore_alloc_add()
>> * vmcore_free_mem_nodes() -> vmcore_free()
>>
>> Which would *really* be misleading, because we are not "freeing" the vmcore.
>>
>> Would "vmcore_range" work for you? Then we could do:
>>
>> * vmcore_alloc_add_mem_node() -> vmcore_alloc_add_range()
>> * vmcore_free_mem_nodes() -> vmcore_free_ranges()
> 
> Yeah, vmcore_range is better, which won't cause misunderstanding.
> Thanks.
> 

Thanks, I'll use that and adjust patch #5 and #6, keeping your ACKs.

-- 
Cheers,

David / dhildenb