On Tuesday, October 12, 2010 22:02:28 [email protected] wrote: > Add a new test to mmap/munmap /dev/zero. A common way of malloc()/free() > anonymous memory on Solaris. Anyway, mmap() of /dev/zero results in > calling map_zero() which on RHEL5 maps the ZERO_PAGE in every pte within > that virtual address range. Since a application is also multi-threaded the > subsequent munmap() of /dev/zero results is TLB shootdowns to all other > CPUs. When this happens thousands or millions of times the application > performance is terrible. The mapping ZERO_PAGE in every pte within that > virtual address range was an optimization to make the subsequent pagefault > times faster on RHEL5 that has been removed/changed upstream.
you need to fix your mailer and/or use `git send-email`. changelogs must be line wrapped to the standard e-mail length (or even a few chars shorter). further, your e-mail lacks the marker "---" which tells git where the changelog ends. `git send-email` takes care of this for you too. patch changelogs (i.e. what changed in v2, v3, ....) should be below the "---" marker or at the end of the changelog (not the start). personally, i prefer the "---" system. -mike
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