hi! >With ~3000 of them active concurrently on a machine with 256M of RAM, >I'm not that surprised that you hit this limit! ok, not a problem - my cd-rom server has some more ram and i will probably never reach that big number of CD`s in the near future. >Again, to keep things simple in the prototype, we grab the biggest >possible table size when we create a new device and then re-allocate it >to the correct size when we finish building the map - that's what the >"Finalized extent map of 56 bytes, 2 entries." messages refer to. may this be a reason why dmlosetup seems to be much slower than traditional losetup? i did some tests with some larger images (100m, 1gig and 2,5gig) and dmlosetting them up took quite a while..... >If debugging was enabled when the module was built, you should also see >messages like: >loop: [DEBUG] setup_loop_extents:Allocated initial extent map of 57352 >bytes, 2048 entries. > >It's these initial large allocations that are causing the errors you see. ahh, good to know ! >The code's pretty dumb in this area at the moment - improving memory >allocation and the time spent looking up entries in the table are our >current goals for dm-loop. what you tell is perfectly in sync with what i observed. fine that you want to adress this! :) >the code will fail if it needs >2048 table entries to describe the file >- - depending on the filesystem used and how fragmented it is this will >limit you to files of a few gigabytes. This is another arbitrary limit >in this version that will go away in later dm-loop releases. indeed, it looks like there is a real hard 2gb limit - i wasn`t able to dmlosetup the 2,5gig files i created anyway - good things will need some time. so i`m just sitting here , waiting for the next versions(s) :) regards roland _____________________________________________________________________ Der WEB.DE SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! http://smartsurfer.web.de/?mc=100071&distributionid=000000000066 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
