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Mark, > I'm using ccache version 2.4 [1]. I just changed ~/.ccache to a symbolic > link to a directory which is NFS mounted [2]. The kernel source itself is > on a local FS. With the ccache suitably primed, when I do a kernel compile > using 'make -j4' it seems to get stuck for seconds at a time. When it gets > unstuck, it blows through a handful of files and then gets stuck again. I'd suggest you first narrow down the problem to either being a locking problem or a file IO problem. To do that, change lock_fd() in util.c in ccache to just "return 0;". That will mean the ccache stats file could become corrupted, but if it runs fast then you know that it is a locking problem. I have noticed severe speed problem with NFS locking on Linux previosly, which is why I mention this as a possibility. Note that removing this locking will not cause ccache to produce incorrect object files, it will just mean the stats printed with "ccache -s" may be inaccurate. Cheers, Tridge PS: I also wonder why you're not just using distcc. It's usually a lot more appropriate in a distributed environment. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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