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Re: [dm-devel] dm-cache: dirty state of blocks in writethrough mode



On 07/23/2013 08:44 AM, Vijarnia, Anil wrote:
Hello,
In Documentation/cache.txt, section ‘Updating on-disk metadata’ mentions that “If the system crashes all cache blocks will be assumed dirty when restarted”. 
I am assuming that the above line is relevant for writeback mode only, and in writethrough mode the cache will always be coherent after a crash. 
Can someone confirm/reject this assumption?

That's correct

Reason being that the cache never holds any dirty pages in writethrough mode.

-- lvmguy

 
Thanks
 
 
 
 

 



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