On 12/19/18 3:48 PM, Yang Shi wrote:
>
>
> On 12/19/18 11:00 AM, Tim Chen wrote:
>> On 12/19/18 10:40 AM, Yang Shi wrote:
>>>
>> I don't think your dereference inode = si->swap_file->f_mapping->host
>> is always safe. You should do it only when (si->flags & SWP_FS) is true.
> Do you
On 12/19/18 11:00 AM, Tim Chen wrote:
On 12/19/18 10:40 AM, Yang Shi wrote:
I don't think your dereference inode = si->swap_file->f_mapping->host
is always safe. You should do it only when (si->flags & SWP_FS) is true.
Do you mean it is not safe for swap partition?
The f_mapping may not
On 12/19/18 10:40 AM, Yang Shi wrote:
>
>
I don't think your dereference inode = si->swap_file->f_mapping->host
is always safe. You should do it only when (si->flags & SWP_FS) is true.
>>> Do you mean it is not safe for swap partition?
>> The f_mapping may not be instantiated. It is
On 12/19/18 9:28 AM, Tim Chen wrote:
On 12/18/18 9:56 PM, Yang Shi wrote:
On 12/18/18 4:16 PM, Tim Chen wrote:
On 12/18/18 3:43 PM, Yang Shi wrote:
On 12/18/18 11:29 AM, Tim Chen wrote:
On 12/17/18 10:52 PM, Yang Shi wrote:
diff --git a/mm/swap_state.c b/mm/swap_state.c
index fd2f21e..7
On 12/18/18 9:56 PM, Yang Shi wrote:
>
>
> On 12/18/18 4:16 PM, Tim Chen wrote:
>> On 12/18/18 3:43 PM, Yang Shi wrote:
>>>
>>> On 12/18/18 11:29 AM, Tim Chen wrote:
On 12/17/18 10:52 PM, Yang Shi wrote:
> diff --git a/mm/swap_state.c b/mm/swap_state.c
> index fd2f21e..7cc3c29 1
On 12/18/18 4:16 PM, Tim Chen wrote:
On 12/18/18 3:43 PM, Yang Shi wrote:
On 12/18/18 11:29 AM, Tim Chen wrote:
On 12/17/18 10:52 PM, Yang Shi wrote:
diff --git a/mm/swap_state.c b/mm/swap_state.c
index fd2f21e..7cc3c29 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -538,11 +538,15
On 12/18/18 3:43 PM, Yang Shi wrote:
>
>
> On 12/18/18 11:29 AM, Tim Chen wrote:
>> On 12/17/18 10:52 PM, Yang Shi wrote:
>>
>>> diff --git a/mm/swap_state.c b/mm/swap_state.c
>>> index fd2f21e..7cc3c29 100644
>>> --- a/mm/swap_state.c
>>> +++ b/mm/swap_state.c
>>> @@ -538,11 +538,15 @@ struct pa
On 12/18/18 11:29 AM, Tim Chen wrote:
On 12/17/18 10:52 PM, Yang Shi wrote:
diff --git a/mm/swap_state.c b/mm/swap_state.c
index fd2f21e..7cc3c29 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -538,11 +538,15 @@ struct page *swap_cluster_readahead(swp_entry_t entry,
gfp_t gfp_mask,
On 12/17/18 10:52 PM, Yang Shi wrote:
>
> diff --git a/mm/swap_state.c b/mm/swap_state.c
> index fd2f21e..7cc3c29 100644
> --- a/mm/swap_state.c
> +++ b/mm/swap_state.c
> @@ -538,11 +538,15 @@ struct page *swap_cluster_readahead(swp_entry_t entry,
> gfp_t gfp_mask,
> bool do_poll = true, p
Swap readahead would read in a few pages regardless if the underlying
device is busy or not. It may incur long waiting time if the device is
congested, and it may also exacerbate the congestion.
Use inode_read_congested() to check if the underlying device is busy or
not like what file page readah
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