5 Mar
2015
5 Mar
'15
3:52 p.m.
On Fri, 6 Mar 2015 08:27:03 +1100 Cameron Simpson wrote:
- _after_ a fast straced df, is un unstraced df slow again? (thinking about cached answers to call, caches in the OS, possibly quite briefly)
I was yesterday, but today the strace'ed version hung as well and I was able to find and unmount some slow filesystems.
I don't know why "df -l" even stat()s an NFS mountpoint at all, it could certainly look at /proc/mounts and find the local only filesystems and utterly ignore the network systems, but it apparently doesn't do that (because I certainly see the stat calls when I strace it).
Judging from the strace it gathers all the info first, then formats it for output, so when it hangs, it prints nothing.