[Bug 431975] Re: downloading a torrent to an encrypted home partition hangs and uses 100% CPU

[TiansHUo]

Under top, init with pid 0 is the one that has 100 cpu, so the second bug
isn't one.

On Wed, Jun 16, 2010 at 8:54 PM, CarloBaldassi
<carlobaldassi at gmail.com>wrote:

> I have this problem as well, but I'm quite sure it's now just being
> slow, as I waited for several hours and operations didn't finish (all
> other operations on the encrypted filesystem take minutes at most, even
> with 10 GiB files). It appears that this happens when the requested file
> size is bigger than free RAM.
>
> Therefore, I think this shouldn't be classified as Wishlist, but rather
> as a proper bug.
>
> The description is similar to what others have observed: looking at the
> system monitor, it starts using CPU and disk and the cache goes up very
> fast; when the cache is full, disk operations stop, but the CPU keeps
> running at 100% and the program becomes unresponsive (both Transmission
> and Vuze). If the processes are killed (kill -9), they keep running as
> zombies at 100% and reboot is the only way to stop them (BTW from what I
> read this in itself could be considered a bug, as zombie processes
> shouldn't keep the CPU busy as far as I know). Swap is never used during
> the process.
>
> My current workaround is to create an unencrypted directory under /home/
> with permissions set to my user, and use that one for torrent downloads
> (clearly not an optimal solution, but still better than using /tmp).
>
> Some additional details on my configuration:
> I'm using Ubuntu Lucid 10.4, clean install, ext4 filesystem, encryption
> selected at installation, up-to-date Kernel (Linux 2.6.32-22-generic
> #36-Ubuntu SMP i686 GNU/Linux)
>
> --
> downloading a torrent to an encrypted home partition hangs and uses 100%
> CPU
> https://bugs.launchpad.net/bugs/431975
> You received this bug notification because you are a direct subscriber
> of the bug.
>


-- 
TiansHUo

-- 
downloading a torrent to an encrypted home partition hangs and uses 100% CPU
https://bugs.launchpad.net/bugs/431975
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