[Bug 328352] Re: mount.ntfs causes 100% CPU (iowait)

[TJ]

Copying is clear enough:

"I was copying an NTFS partition image using dd from an external USB
hard-drive to /dev/sda2 (after replacing the laptop's internal hard-
disk)."

E.g. dd if=/media/mobile120/vista.img of=/dev/sda2

The file being copied was 29GB.

I mentioned it simply because it might be related, but the actual issue
was mount.ntfs processing /dev/sda1 (which contains a Windows Recovery
NTFS file-system).

There is/was no hardware problem.

Somehow mount.ntfs and the fuse daemon got stuck in a deadlock.

I wish I knew how to reproduce it but it isn't clear what triggered the
mount in the first place. I 'assume' it was some part of the nautilus
auto-mount triggering but as the drive is internal that doesn't quite
make sense.

Possibly the large ongoing data transfer to /dev/sda2 caused a
problem/delay that fuse daemon couldn't handle when it was asked to
mount /dev/sda1, and it got stuck spinning on I/O.

-- 
mount.ntfs causes 100% CPU (iowait)
https://bugs.launchpad.net/bugs/328352
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