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... Thor