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On 01/07/2011 11:57 PM, Michael Orlitzky wrote: |
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> I was able to figure out my new apache problem. It seems that |
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> PAX_MEMORY_UDEREF and apache's EnableMMAP directive don't get along |
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> sometimes: |
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> |
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> http://httpd.apache.org/docs/2.2/mod/core.html#enablemmap |
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> |
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> With UDEREF enabled and MMAP on, I get random inappropriate 206 response |
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> codes everywhere causing headers, images, and CSS files to fail to |
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> transfer properly. |
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> |
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> This is sufficiently into the realm of what I consider voodoo. Is there |
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> anything I can do to help narrow down the problem, or should I just |
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> disable MMAP and be happy? |
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|
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It sounds like a problem in the way apache is doing the mmap and PaX is |
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killing it. The new stricter PaX rules don't allow the permission of |
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allocated pages to be changed, eg RW -> RX, or to be RWX. This has come |
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up elsewhere, see |
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|
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http://bugs.gentoo.org/show_bug.cgi?id=329499 |
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|
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To verify my suspicion, an strace would be helpful. If you don't mind, |
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open up a bug with your findings, give your emerge --info, the flags you |
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used with apache, and an strace of apache going bad. This will be a |
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start for us. |
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|
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-- |
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Anthony G. Basile, Ph.D. |
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Gentoo Developer |
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