On 7/8/14, 7:21 AM, Warner Losh wrote:
Author: imp
Date: Mon Jul 7 23:21:20 2014
New Revision: 268376
URL: http://svnweb.freebsd.org/changeset/base/268376
Log:
rm -rf can fail sometimes with an error from fts_read. Make it honor
fflag to ignore fts_read errors, but stop deleting from that directory
because no further progress can be made.
When building a kernel with a high -j value on a high core count
machine, during the cleanobj phase we can wind up doing multiple rm
-rf at the same time for modules that have subdirectories. This
exposed this race (sometimes) as fts_read can return an error if the
directory is removed by another rm -rf. Since the intent of the -f
flag was to ignore errors, even if this was a bug in fts_read, we
should ignore the error like we've been instructed to do.
One could make an argument that being unable to delete something
because someone else deleted it first is a "non error".
Even without -f
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