[prev in list] [next in list] [prev in thread] [next in thread] 

List:       qemu-devel
Subject:    Re: [Qemu-devel] [PATCH 2/2] qemu-ga: add guest-fstrim command
From:       Chris Wedgwood <cw () f00f ! org>
Date:       2012-06-23 3:38:51
Message-ID: 20120623033851.GA10913 () puku ! stupidest ! org
[Download RAW message or body]

> I'm not sure I understand, wouldn't the filesystem need to be involved
> at some level? How can the block layer differentiate lazilly discarded data
> blocks from ones that are still in use without the aid of the
> filesystem?

It might be me that doesn't understand.

Yes, the filesystem is involved.  Current linux filesystems can trim
on demand or using fstrim.  That mechanism seems to be like it should
suffice if exposed in the most common cases.


[prev in list] [next in list] [prev in thread] [next in thread]