* [RFC PATCH] vmalloc: show more detail info in vmallocinfo for clarify
@ 2017-05-20 6:47 ` Yisheng Xie
0 siblings, 0 replies; 6+ messages in thread
From: Yisheng Xie @ 2017-05-20 6:47 UTC (permalink / raw)
To: akpm, mhocko, zijun_hu, mingo, thgarnie, kirill.shutemov,
aryabinin, chris
Cc: linux-mm, linux-kernel, guohanjun
When ioremap a 67112960 bytes vm_area with the vmallocinfo:
[..]
0xec79b000-0xec7fa000 389120 ftl_add_mtd+0x4d0/0x754 pages=94 vmalloc
0xec800000-0xecbe1000 4067328 kbox_proc_mem_write+0x104/0x1c4 phys=8b520000 ioremap
we get result:
0xf1000000-0xf5001000 67112960 devm_ioremap+0x38/0x7c phys=40000000 ioremap
For the align for ioremap must be less than '1 << IOREMAP_MAX_ORDER':
if (flags & VM_IOREMAP)
align = 1ul << clamp_t(int, get_count_order_long(size),
PAGE_SHIFT, IOREMAP_MAX_ORDER);
So it makes idiot like me a litter puzzle why jump the vm_area from
0xec800000-0xecbe1000 to 0xf1000000-0xf5001000, and leave
0xed000000-0xf1000000 as a big hole.
This is to show all of vm_area, including which is freeing but still in
vmap_area_list, to make it more clear about why we will get
0xf1000000-0xf5001000 int the above case. And we will get the
vmallocinfo like:
[..]
0xec79b000-0xec7fa000 389120 ftl_add_mtd+0x4d0/0x754 pages=94 vmalloc
0xec800000-0xecbe1000 4067328 kbox_proc_mem_write+0x104/0x1c4 phys=8b520000 ioremap
[..]
0xece7c000-0xece7e000 8192 freeing vm_area
0xece7e000-0xece83000 20480 vm_map_ram
0xf0099000-0xf00aa000 69632 vm_map_ram
0xf1000000-0xf5001000 67112960 devm_ioremap+0x38/0x7c phys=40000000 ioremap
after apply this patch.
Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
---
mm/vmalloc.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index b52aeed..dbb24fc 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -314,6 +314,7 @@ unsigned long vmalloc_to_pfn(const void *vmalloc_addr)
/*** Global kva allocator ***/
+#define VM_LAZY_FREE 0x02
#define VM_VM_AREA 0x04
static DEFINE_SPINLOCK(vmap_area_lock);
@@ -1486,6 +1487,7 @@ struct vm_struct *remove_vm_area(const void *addr)
spin_lock(&vmap_area_lock);
va->vm = NULL;
va->flags &= ~VM_VM_AREA;
+ va->flags |= VM_LAZY_FREE;
spin_unlock(&vmap_area_lock);
vmap_debug_free_range(va->va_start, va->va_end);
@@ -2684,8 +2686,14 @@ static int s_show(struct seq_file *m, void *p)
* s_show can encounter race with remove_vm_area, !VM_VM_AREA on
* behalf of vmap area is being tear down or vm_map_ram allocation.
*/
- if (!(va->flags & VM_VM_AREA))
+ if (!(va->flags & VM_VM_AREA)) {
+ seq_printf(m, "0x%pK-0x%pK %7ld %s\n",
+ (void *)va->va_start, (void *)va->va_end,
+ va->va_end - va->va_start,
+ va->flags & VM_LAZY_FREE ? "freeing vm_area" : "vm_map_ram");
+
return 0;
+ }
v = va->vm;
--
1.7.12.4
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [RFC PATCH] vmalloc: show more detail info in vmallocinfo for clarify
@ 2017-05-20 6:47 ` Yisheng Xie
0 siblings, 0 replies; 6+ messages in thread
From: Yisheng Xie @ 2017-05-20 6:47 UTC (permalink / raw)
To: akpm, mhocko, zijun_hu, mingo, thgarnie, kirill.shutemov,
aryabinin, chris
Cc: linux-mm, linux-kernel, guohanjun
When ioremap a 67112960 bytes vm_area with the vmallocinfo:
[..]
0xec79b000-0xec7fa000 389120 ftl_add_mtd+0x4d0/0x754 pages=94 vmalloc
0xec800000-0xecbe1000 4067328 kbox_proc_mem_write+0x104/0x1c4 phys=8b520000 ioremap
we get result:
0xf1000000-0xf5001000 67112960 devm_ioremap+0x38/0x7c phys=40000000 ioremap
For the align for ioremap must be less than '1 << IOREMAP_MAX_ORDER':
if (flags & VM_IOREMAP)
align = 1ul << clamp_t(int, get_count_order_long(size),
PAGE_SHIFT, IOREMAP_MAX_ORDER);
So it makes idiot like me a litter puzzle why jump the vm_area from
0xec800000-0xecbe1000 to 0xf1000000-0xf5001000, and leave
0xed000000-0xf1000000 as a big hole.
This is to show all of vm_area, including which is freeing but still in
vmap_area_list, to make it more clear about why we will get
0xf1000000-0xf5001000 int the above case. And we will get the
vmallocinfo like:
[..]
0xec79b000-0xec7fa000 389120 ftl_add_mtd+0x4d0/0x754 pages=94 vmalloc
0xec800000-0xecbe1000 4067328 kbox_proc_mem_write+0x104/0x1c4 phys=8b520000 ioremap
[..]
0xece7c000-0xece7e000 8192 freeing vm_area
0xece7e000-0xece83000 20480 vm_map_ram
0xf0099000-0xf00aa000 69632 vm_map_ram
0xf1000000-0xf5001000 67112960 devm_ioremap+0x38/0x7c phys=40000000 ioremap
after apply this patch.
Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
---
mm/vmalloc.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index b52aeed..dbb24fc 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -314,6 +314,7 @@ unsigned long vmalloc_to_pfn(const void *vmalloc_addr)
/*** Global kva allocator ***/
+#define VM_LAZY_FREE 0x02
#define VM_VM_AREA 0x04
static DEFINE_SPINLOCK(vmap_area_lock);
@@ -1486,6 +1487,7 @@ struct vm_struct *remove_vm_area(const void *addr)
spin_lock(&vmap_area_lock);
va->vm = NULL;
va->flags &= ~VM_VM_AREA;
+ va->flags |= VM_LAZY_FREE;
spin_unlock(&vmap_area_lock);
vmap_debug_free_range(va->va_start, va->va_end);
@@ -2684,8 +2686,14 @@ static int s_show(struct seq_file *m, void *p)
* s_show can encounter race with remove_vm_area, !VM_VM_AREA on
* behalf of vmap area is being tear down or vm_map_ram allocation.
*/
- if (!(va->flags & VM_VM_AREA))
+ if (!(va->flags & VM_VM_AREA)) {
+ seq_printf(m, "0x%pK-0x%pK %7ld %s\n",
+ (void *)va->va_start, (void *)va->va_end,
+ va->va_end - va->va_start,
+ va->flags & VM_LAZY_FREE ? "freeing vm_area" : "vm_map_ram");
+
return 0;
+ }
v = va->vm;
--
1.7.12.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [RFC PATCH] vmalloc: show more detail info in vmallocinfo for clarify
2017-05-20 6:47 ` Yisheng Xie
@ 2017-05-31 0:56 ` Tim Chen
-1 siblings, 0 replies; 6+ messages in thread
From: Tim Chen @ 2017-05-31 0:56 UTC (permalink / raw)
To: Yisheng Xie, akpm, mhocko, zijun_hu, mingo, thgarnie,
kirill.shutemov, aryabinin, chris
Cc: linux-mm, linux-kernel, guohanjun
On 05/19/2017 11:47 PM, Yisheng Xie wrote:
> When ioremap a 67112960 bytes vm_area with the vmallocinfo:
> [..]
> 0xec79b000-0xec7fa000 389120 ftl_add_mtd+0x4d0/0x754 pages=94 vmalloc
> 0xec800000-0xecbe1000 4067328 kbox_proc_mem_write+0x104/0x1c4 phys=8b520000 ioremap
>
> we get result:
> 0xf1000000-0xf5001000 67112960 devm_ioremap+0x38/0x7c phys=40000000 ioremap
>
> For the align for ioremap must be less than '1 << IOREMAP_MAX_ORDER':
> if (flags & VM_IOREMAP)
> align = 1ul << clamp_t(int, get_count_order_long(size),
> PAGE_SHIFT, IOREMAP_MAX_ORDER);
>
> So it makes idiot like me a litter puzzle why jump the vm_area from
> 0xec800000-0xecbe1000 to 0xf1000000-0xf5001000, and leave
> 0xed000000-0xf1000000 as a big hole.
>
> This is to show all of vm_area, including which is freeing but still in
> vmap_area_list, to make it more clear about why we will get
> 0xf1000000-0xf5001000 int the above case. And we will get the
> vmallocinfo like:
> [..]
> 0xec79b000-0xec7fa000 389120 ftl_add_mtd+0x4d0/0x754 pages=94 vmalloc
> 0xec800000-0xecbe1000 4067328 kbox_proc_mem_write+0x104/0x1c4 phys=8b520000 ioremap
> [..]
> 0xece7c000-0xece7e000 8192 freeing vm_area
> 0xece7e000-0xece83000 20480 vm_map_ram
> 0xf0099000-0xf00aa000 69632 vm_map_ram
> 0xf1000000-0xf5001000 67112960 devm_ioremap+0x38/0x7c phys=40000000 ioremap
> after apply this patch.
>
> Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
> ---
> mm/vmalloc.c | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/mm/vmalloc.c b/mm/vmalloc.c
> index b52aeed..dbb24fc 100644
> --- a/mm/vmalloc.c
> +++ b/mm/vmalloc.c
> @@ -314,6 +314,7 @@ unsigned long vmalloc_to_pfn(const void *vmalloc_addr)
>
> /*** Global kva allocator ***/
>
> +#define VM_LAZY_FREE 0x02
> #define VM_VM_AREA 0x04
>
> static DEFINE_SPINLOCK(vmap_area_lock);
> @@ -1486,6 +1487,7 @@ struct vm_struct *remove_vm_area(const void *addr)
> spin_lock(&vmap_area_lock);
> va->vm = NULL;
> va->flags &= ~VM_VM_AREA;
> + va->flags |= VM_LAZY_FREE;
> spin_unlock(&vmap_area_lock);
>
> vmap_debug_free_range(va->va_start, va->va_end);
> @@ -2684,8 +2686,14 @@ static int s_show(struct seq_file *m, void *p)
> * s_show can encounter race with remove_vm_area, !VM_VM_AREA on
> * behalf of vmap area is being tear down or vm_map_ram allocation.
> */
> - if (!(va->flags & VM_VM_AREA))
> + if (!(va->flags & VM_VM_AREA)) {
> + seq_printf(m, "0x%pK-0x%pK %7ld %s\n",
> + (void *)va->va_start, (void *)va->va_end,
> + va->va_end - va->va_start,
> + va->flags & VM_LAZY_FREE ? "freeing vm_area" : "vm_map_ram");
Will be clearer to say "unpurged vm_area" instead of "freeing vm_area".
Thanks.
Tim
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [RFC PATCH] vmalloc: show more detail info in vmallocinfo for clarify
@ 2017-05-31 0:56 ` Tim Chen
0 siblings, 0 replies; 6+ messages in thread
From: Tim Chen @ 2017-05-31 0:56 UTC (permalink / raw)
To: Yisheng Xie, akpm, mhocko, zijun_hu, mingo, thgarnie,
kirill.shutemov, aryabinin, chris
Cc: linux-mm, linux-kernel, guohanjun
On 05/19/2017 11:47 PM, Yisheng Xie wrote:
> When ioremap a 67112960 bytes vm_area with the vmallocinfo:
> [..]
> 0xec79b000-0xec7fa000 389120 ftl_add_mtd+0x4d0/0x754 pages=94 vmalloc
> 0xec800000-0xecbe1000 4067328 kbox_proc_mem_write+0x104/0x1c4 phys=8b520000 ioremap
>
> we get result:
> 0xf1000000-0xf5001000 67112960 devm_ioremap+0x38/0x7c phys=40000000 ioremap
>
> For the align for ioremap must be less than '1 << IOREMAP_MAX_ORDER':
> if (flags & VM_IOREMAP)
> align = 1ul << clamp_t(int, get_count_order_long(size),
> PAGE_SHIFT, IOREMAP_MAX_ORDER);
>
> So it makes idiot like me a litter puzzle why jump the vm_area from
> 0xec800000-0xecbe1000 to 0xf1000000-0xf5001000, and leave
> 0xed000000-0xf1000000 as a big hole.
>
> This is to show all of vm_area, including which is freeing but still in
> vmap_area_list, to make it more clear about why we will get
> 0xf1000000-0xf5001000 int the above case. And we will get the
> vmallocinfo like:
> [..]
> 0xec79b000-0xec7fa000 389120 ftl_add_mtd+0x4d0/0x754 pages=94 vmalloc
> 0xec800000-0xecbe1000 4067328 kbox_proc_mem_write+0x104/0x1c4 phys=8b520000 ioremap
> [..]
> 0xece7c000-0xece7e000 8192 freeing vm_area
> 0xece7e000-0xece83000 20480 vm_map_ram
> 0xf0099000-0xf00aa000 69632 vm_map_ram
> 0xf1000000-0xf5001000 67112960 devm_ioremap+0x38/0x7c phys=40000000 ioremap
> after apply this patch.
>
> Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
> ---
> mm/vmalloc.c | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/mm/vmalloc.c b/mm/vmalloc.c
> index b52aeed..dbb24fc 100644
> --- a/mm/vmalloc.c
> +++ b/mm/vmalloc.c
> @@ -314,6 +314,7 @@ unsigned long vmalloc_to_pfn(const void *vmalloc_addr)
>
> /*** Global kva allocator ***/
>
> +#define VM_LAZY_FREE 0x02
> #define VM_VM_AREA 0x04
>
> static DEFINE_SPINLOCK(vmap_area_lock);
> @@ -1486,6 +1487,7 @@ struct vm_struct *remove_vm_area(const void *addr)
> spin_lock(&vmap_area_lock);
> va->vm = NULL;
> va->flags &= ~VM_VM_AREA;
> + va->flags |= VM_LAZY_FREE;
> spin_unlock(&vmap_area_lock);
>
> vmap_debug_free_range(va->va_start, va->va_end);
> @@ -2684,8 +2686,14 @@ static int s_show(struct seq_file *m, void *p)
> * s_show can encounter race with remove_vm_area, !VM_VM_AREA on
> * behalf of vmap area is being tear down or vm_map_ram allocation.
> */
> - if (!(va->flags & VM_VM_AREA))
> + if (!(va->flags & VM_VM_AREA)) {
> + seq_printf(m, "0x%pK-0x%pK %7ld %s\n",
> + (void *)va->va_start, (void *)va->va_end,
> + va->va_end - va->va_start,
> + va->flags & VM_LAZY_FREE ? "freeing vm_area" : "vm_map_ram");
Will be clearer to say "unpurged vm_area" instead of "freeing vm_area".
Thanks.
Tim
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [RFC PATCH] vmalloc: show more detail info in vmallocinfo for clarify
2017-05-31 0:56 ` Tim Chen
@ 2017-05-31 4:35 ` Yisheng Xie
-1 siblings, 0 replies; 6+ messages in thread
From: Yisheng Xie @ 2017-05-31 4:35 UTC (permalink / raw)
To: Tim Chen, akpm, mhocko, zijun_hu, mingo, thgarnie,
kirill.shutemov, aryabinin, chris
Cc: linux-mm, linux-kernel, guohanjun
Hi Tim,
Thanks for comment!
On 2017/5/31 8:56, Tim Chen wrote:
> On 05/19/2017 11:47 PM, Yisheng Xie wrote:
>> When ioremap a 67112960 bytes vm_area with the vmallocinfo:
>> [..]
>> 0xec79b000-0xec7fa000 389120 ftl_add_mtd+0x4d0/0x754 pages=94 vmalloc
>> 0xec800000-0xecbe1000 4067328 kbox_proc_mem_write+0x104/0x1c4 phys=8b520000 ioremap
>>
>> we get result:
>> 0xf1000000-0xf5001000 67112960 devm_ioremap+0x38/0x7c phys=40000000 ioremap
>>
>> For the align for ioremap must be less than '1 << IOREMAP_MAX_ORDER':
>> if (flags & VM_IOREMAP)
>> align = 1ul << clamp_t(int, get_count_order_long(size),
>> PAGE_SHIFT, IOREMAP_MAX_ORDER);
>>
>> So it makes idiot like me a litter puzzle why jump the vm_area from
>> 0xec800000-0xecbe1000 to 0xf1000000-0xf5001000, and leave
>> 0xed000000-0xf1000000 as a big hole.
>>
>> This is to show all of vm_area, including which is freeing but still in
>> vmap_area_list, to make it more clear about why we will get
>> 0xf1000000-0xf5001000 int the above case. And we will get the
>> vmallocinfo like:
>> [..]
>> 0xec79b000-0xec7fa000 389120 ftl_add_mtd+0x4d0/0x754 pages=94 vmalloc
>> 0xec800000-0xecbe1000 4067328 kbox_proc_mem_write+0x104/0x1c4 phys=8b520000 ioremap
>> [..]
>> 0xece7c000-0xece7e000 8192 freeing vm_area
>> 0xece7e000-0xece83000 20480 vm_map_ram
>> 0xf0099000-0xf00aa000 69632 vm_map_ram
>> 0xf1000000-0xf5001000 67112960 devm_ioremap+0x38/0x7c phys=40000000 ioremap
>> after apply this patch.
>>
>> Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
>> ---
>> mm/vmalloc.c | 10 +++++++++-
>> 1 file changed, 9 insertions(+), 1 deletion(-)
>>
>> diff --git a/mm/vmalloc.c b/mm/vmalloc.c
>> index b52aeed..dbb24fc 100644
>> --- a/mm/vmalloc.c
>> +++ b/mm/vmalloc.c
>> @@ -314,6 +314,7 @@ unsigned long vmalloc_to_pfn(const void *vmalloc_addr)
>>
>> /*** Global kva allocator ***/
>>
>> +#define VM_LAZY_FREE 0x02
>> #define VM_VM_AREA 0x04
>>
>> static DEFINE_SPINLOCK(vmap_area_lock);
>> @@ -1486,6 +1487,7 @@ struct vm_struct *remove_vm_area(const void *addr)
>> spin_lock(&vmap_area_lock);
>> va->vm = NULL;
>> va->flags &= ~VM_VM_AREA;
>> + va->flags |= VM_LAZY_FREE;
>> spin_unlock(&vmap_area_lock);
>>
>> vmap_debug_free_range(va->va_start, va->va_end);
>> @@ -2684,8 +2686,14 @@ static int s_show(struct seq_file *m, void *p)
>> * s_show can encounter race with remove_vm_area, !VM_VM_AREA on
>> * behalf of vmap area is being tear down or vm_map_ram allocation.
>> */
>> - if (!(va->flags & VM_VM_AREA))
>> + if (!(va->flags & VM_VM_AREA)) {
>> + seq_printf(m, "0x%pK-0x%pK %7ld %s\n",
>> + (void *)va->va_start, (void *)va->va_end,
>> + va->va_end - va->va_start,
>> + va->flags & VM_LAZY_FREE ? "freeing vm_area" : "vm_map_ram");
>
> Will be clearer to say "unpurged vm_area" instead of "freeing vm_area".
Yes, I will change it in next version.
Thanks
Yisheng Xie
>
> Thanks.
>
> Tim
>
> .
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [RFC PATCH] vmalloc: show more detail info in vmallocinfo for clarify
@ 2017-05-31 4:35 ` Yisheng Xie
0 siblings, 0 replies; 6+ messages in thread
From: Yisheng Xie @ 2017-05-31 4:35 UTC (permalink / raw)
To: Tim Chen, akpm, mhocko, zijun_hu, mingo, thgarnie,
kirill.shutemov, aryabinin, chris
Cc: linux-mm, linux-kernel, guohanjun
Hi Tim,
Thanks for comment!
On 2017/5/31 8:56, Tim Chen wrote:
> On 05/19/2017 11:47 PM, Yisheng Xie wrote:
>> When ioremap a 67112960 bytes vm_area with the vmallocinfo:
>> [..]
>> 0xec79b000-0xec7fa000 389120 ftl_add_mtd+0x4d0/0x754 pages=94 vmalloc
>> 0xec800000-0xecbe1000 4067328 kbox_proc_mem_write+0x104/0x1c4 phys=8b520000 ioremap
>>
>> we get result:
>> 0xf1000000-0xf5001000 67112960 devm_ioremap+0x38/0x7c phys=40000000 ioremap
>>
>> For the align for ioremap must be less than '1 << IOREMAP_MAX_ORDER':
>> if (flags & VM_IOREMAP)
>> align = 1ul << clamp_t(int, get_count_order_long(size),
>> PAGE_SHIFT, IOREMAP_MAX_ORDER);
>>
>> So it makes idiot like me a litter puzzle why jump the vm_area from
>> 0xec800000-0xecbe1000 to 0xf1000000-0xf5001000, and leave
>> 0xed000000-0xf1000000 as a big hole.
>>
>> This is to show all of vm_area, including which is freeing but still in
>> vmap_area_list, to make it more clear about why we will get
>> 0xf1000000-0xf5001000 int the above case. And we will get the
>> vmallocinfo like:
>> [..]
>> 0xec79b000-0xec7fa000 389120 ftl_add_mtd+0x4d0/0x754 pages=94 vmalloc
>> 0xec800000-0xecbe1000 4067328 kbox_proc_mem_write+0x104/0x1c4 phys=8b520000 ioremap
>> [..]
>> 0xece7c000-0xece7e000 8192 freeing vm_area
>> 0xece7e000-0xece83000 20480 vm_map_ram
>> 0xf0099000-0xf00aa000 69632 vm_map_ram
>> 0xf1000000-0xf5001000 67112960 devm_ioremap+0x38/0x7c phys=40000000 ioremap
>> after apply this patch.
>>
>> Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
>> ---
>> mm/vmalloc.c | 10 +++++++++-
>> 1 file changed, 9 insertions(+), 1 deletion(-)
>>
>> diff --git a/mm/vmalloc.c b/mm/vmalloc.c
>> index b52aeed..dbb24fc 100644
>> --- a/mm/vmalloc.c
>> +++ b/mm/vmalloc.c
>> @@ -314,6 +314,7 @@ unsigned long vmalloc_to_pfn(const void *vmalloc_addr)
>>
>> /*** Global kva allocator ***/
>>
>> +#define VM_LAZY_FREE 0x02
>> #define VM_VM_AREA 0x04
>>
>> static DEFINE_SPINLOCK(vmap_area_lock);
>> @@ -1486,6 +1487,7 @@ struct vm_struct *remove_vm_area(const void *addr)
>> spin_lock(&vmap_area_lock);
>> va->vm = NULL;
>> va->flags &= ~VM_VM_AREA;
>> + va->flags |= VM_LAZY_FREE;
>> spin_unlock(&vmap_area_lock);
>>
>> vmap_debug_free_range(va->va_start, va->va_end);
>> @@ -2684,8 +2686,14 @@ static int s_show(struct seq_file *m, void *p)
>> * s_show can encounter race with remove_vm_area, !VM_VM_AREA on
>> * behalf of vmap area is being tear down or vm_map_ram allocation.
>> */
>> - if (!(va->flags & VM_VM_AREA))
>> + if (!(va->flags & VM_VM_AREA)) {
>> + seq_printf(m, "0x%pK-0x%pK %7ld %s\n",
>> + (void *)va->va_start, (void *)va->va_end,
>> + va->va_end - va->va_start,
>> + va->flags & VM_LAZY_FREE ? "freeing vm_area" : "vm_map_ram");
>
> Will be clearer to say "unpurged vm_area" instead of "freeing vm_area".
Yes, I will change it in next version.
Thanks
Yisheng Xie
>
> Thanks.
>
> Tim
>
> .
>
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2017-05-31 4:39 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2017-05-20 6:47 [RFC PATCH] vmalloc: show more detail info in vmallocinfo for clarify Yisheng Xie
2017-05-20 6:47 ` Yisheng Xie
2017-05-31 0:56 ` Tim Chen
2017-05-31 0:56 ` Tim Chen
2017-05-31 4:35 ` Yisheng Xie
2017-05-31 4:35 ` Yisheng Xie
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.