On 3/11/2013 7:52 AM, Jan Kara wrote:
Yep, that's because it isn't implemented.
Why do you think so? AFAICS it is implemented by setting VM_RAND_READ
flag in the VMA and do_async_mmap_readahead() and do_sync_mmap_readahead()
check for the flag and don't do anything if it is set...
Oh, don't know how I missed that... I was just looking for it the other
day and couldn't find any references to VM_RandomReadHint so I assumed
it hadn't been implemented.
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