Comment 9 for bug 1856256

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Bill F (bill-f-666) wrote :

Hi! I'm sorry to say that I'm just now noticing this comment (thanks for that go to yahoo's over-zealous spam filter).

I have a couple followup questions:

1. any chance this fix (https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a125bcda2d0aee1d98b51c167aca60fb312572aa) could be helpful w/r/t the behavior described in this bug? (I'm guessing not, or there would be some linkage in this bug tracker, but the part about “fix aa_xattrs_match() may sleep while holding a RCU lock” sounded intriguing)

2. if you would kind enough to indulge a rather vague inquiry: do you have any thoughts about how the locking described in your last comment might interact with mod_apparmor, when the apache2 parent profile (with ~hundreds of apache2 subprofiles) is reloaded, while a set of apache worker processes are under significant request load? (I very much appreciated your previous, detailed descriptions of the profile parsing and reloading procedures, but I'm still having a hard time seeing how any of these steps would cause degradation for such a long *duration* -- like, minutes or even tens of minutes -- particularly if almost all of the subprofiles' compiled profiles are determined to be duplicates of the ones currently loaded)

Thank you so much for your responses so far, and I will be sure to check my spam folder from now on!