https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224479
--- Comment #2 from Wolfram Schneider <[email protected]> --- the suspect commit is: commit c123c7433b7eb3ccacfa1bae8ae136c61cfe8462 Author: alc <[email protected]> Date: Tue Nov 28 17:46:03 2017 +0000 When the swap pager allocates space on disk, it requests contiguous blocks in a single call to blist_alloc(). However, when it frees that space, it previously called blist_free() on each block, one at a time. With this change, the swap pager identifies ranges of contiguous blocks to be freed, and calls blist_free() once per range. In one extreme case, that is described in the review, the time to perform an munmap(2) was reduced by 55%. Submitted by: Doug Moore <[email protected]> Reviewed by: kib MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D12397 I did a git revert, recompiled the kernel and the problem was gone. Note: I do not say this commit created a new bug. It is very likely that it triggered an old bug. There are many reports about this kind of bug for older releases on the net. -- You are receiving this mail because: You are the assignee for the bug. _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "[email protected]"
