re: filesystem writing inodes when it oughtn't?

[matthew green <mrg%eterna.com.au@localhost>]

> On Thu, Mar 31, 2011 at 03:53:22PM -0400, Thor Lancelot Simon wrote:
> > 
> >     2) About 200 xfers/sec (about 3MB/sec worth) is still going on
> >        to the SSD for much of the build process.  It's all writes.
> >        All build directories (obj, dest, tools, release) are on
> >        a separate tmpfs, /tmp is on tmpfs, the machine isn't
> >        using any swap, and I am building with -U -O.  By the time I
> >        verified all this, the disk writes were done so I couldn't
> >        use fstat to see what files might be being written.
> 
> I cannot find anything relevant open in / for write while this is going
> on (/ is the SSD on this system).  The filesystem is mounted noatime,
> nodevmtime, but I suspect it's having metadata written out when it shouldn't
> anyway.  I note that others have reported laptop disks spinning up recently
> for no obvious reason...

our gcc 4.1 uses /var/tmp before /tmp.  i worked around it without
touching gcc itself by setting TMPDIR=/tmp in the makewrapper.

i noticed this slow down some builds for on a new system.


.mrg.