Re: [PATCH 1/3] Add flag to identify block swap devices

[Nitin Gupta]

On 05/07/2010 01:33 PM, jassi brar wrote:
> On Fri, May 7, 2010 at 4:25 PM, Nitin Gupta <ngupta@xxxxxxxxxx> wrote:
>> Added SWP_BLKDEV flag to distinguish block and regular file backed
>> swap devices. We could also check if a swap is entire block device,
>> rather than a file, by:
>> S_ISBLK(swap_info_struct->swap_file->f_mapping->host->i_mode)
>> but, I think, simply checking this flag is more convenient.
> This might make it convenient for now but is likely to increase complexity and
> redundancy. Why not define a macro/inline to figure that out?
> 

Accessing such long pointer chain is maybe not good thing to do for
every swap_entry_free() call? Simple checking a flag is perhaps slightly
faster? I also can't see how this flag can later increase complexity
compared to creating new macro for this check.

Thanks,
Nitin
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