Dmitry Olenin, Wed, 09 Nov 2011 17:03:39 +0900: > On 11/09/2011 04:48 PM, Lubos Kolouch wrote: >> Sorry for possibly OT question - when I have historical btrfs system >> mounted with zlib compression, >> >> can I remount it with lzo ? What will happen? Will the COW be broken >> and the files taking duplicate space? Or will the Universe explode and >> be replaced with something even more bizzare? > > Hello Lubos If you have a kernel that supports lzo (don't quite remember > when it got in), why can't you? > Absolutely nothing will happen, and only the new/updated files will be > with lzo compression. You can remount on the fly switching b/w the two > compression options without any problems. Hello Dmitry, By the way, this is interesting question to me - I mounted the filesystem with -o compress=lzo, in dmesg showed btrfs: use lzo compression, but - the lzo module was not loaded (not shown in lsmod - and yes, I have it as a module). When I do modprobe lzo, it shows there. Isn't it a bit strange? So btrfs is using lzo module that was not loaded? (and says so in the dmesg output)? Thank you Lubos -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
