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Re: Automounted NFS shares never timeout

On Monday 17 March 2014 14:46:54 Michael Schuerig wrote:
> I have a single NFS share automounted by autofs. Once it is mounted,
> it is never (auto-)unmounted, even though I don't explicityl access
> it. Lsof does not show any open files below the mount point.

When I start plasma-desktop under strace, the main thread blocks in a 
call to lstat.

$ strace -f plasma-desktop

[pid  2189] lstat("/net", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
[pid  2189] lstat("/net/tardis", {st_mode=S_IFDIR|0555, st_size=0, ...}) 
= 0
[pid  2189] lstat("/net/tardis/srv", {st_mode=S_IFDIR|0555, st_size=0, 
...}) = 0
[pid  2189] lstat("/net/tardis/srv/test",  <unfinished ...>

I'd like to use gdb to generate a backtrace from there, but I don't know 
how to set a breakpoint on that specific lstat syscall.


Michael Schuerig

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