On 07/11/2013 10:46 PM, Andy Lutomirski wrote:
>
> Sorry I'm late to the party -- I didn't notice this until the lwn
> article this week.
>
> How does this get munmap + mmap right? mremap marks things soft-dirty,
> but unmapping and remapping seems like it will result in the soft-dirty
> bit bei
On 04/30/2013 09:12 AM, Pavel Emelyanov wrote:
> The soft-dirty is a bit on a PTE which helps to track which pages a task
> writes to. In order to do this tracking one should
>
> 1. Clear soft-dirty bits from PTEs ("echo 4 > /proc/PID/clear_refs)
> 2. Wait some time.
> 3. Read soft-dirty bit
On 05/03/2013 03:36 PM, Xiao Guangrong wrote:
> On 05/01/2013 12:12 AM, Pavel Emelyanov wrote:
>
>> +static inline void clear_soft_dirty(struct vm_area_struct *vma,
>> +unsigned long addr, pte_t *pte)
>> +{
>> +#ifdef CONFIG_MEM_SOFT_DIRTY
>> +/*
>> + * The soft-dirty tracker u
On 05/01/2013 12:12 AM, Pavel Emelyanov wrote:
> +static inline void clear_soft_dirty(struct vm_area_struct *vma,
> + unsigned long addr, pte_t *pte)
> +{
> +#ifdef CONFIG_MEM_SOFT_DIRTY
> + /*
> + * The soft-dirty tracker uses #PF-s to catch writes
> + * to pages, so wri
The soft-dirty is a bit on a PTE which helps to track which pages a task
writes to. In order to do this tracking one should
1. Clear soft-dirty bits from PTEs ("echo 4 > /proc/PID/clear_refs)
2. Wait some time.
3. Read soft-dirty bits (55'th in /proc/PID/pagemap entries)
To do this tracking
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