Date: Wed, 21 Jul 2021 19:25:30 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 257318] uma consumes memory when reattaching device Message-ID: <bug-257318-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D257318 Bug ID: 257318 Summary: uma consumes memory when reattaching device Product: Base System Version: 13.0-STABLE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: jcaplan@blackberry.com Overview -------- After patching in fixes for all identified leaks, detaching and re-attaching the same device consistently results in kmem allocation. currently open leaks: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D256714 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D257218 Steps to Reproduce: ------------------- #!/bin/bash for i in {1..1000}; do echo $i devctl detach pci0:3:0:0 devctl attach pci0:3:0:0 sysctl vm.uma_kmem_total done Expected Result --------------- Perhaps after some initial warming stage, detaching and re-attaching the sa= me device should not increase the amount of memory consumed by uma. Actual Result ------------- Even after many thousands of iterations, uma_kmem_total continues to increa= se Build Date & Hardware --------------------- FreeBSD freebsd 13.0-RELEASE FreeBSD 13.0-RELEASE #7 releng/13.0-n244733-ea31abc261f-dirty: Wed Jul 21 14:53:10 UTC 2021 Additional Information ---------------------- Seem to keep hitting keg_alloc_slab from cache_alloc_retry --=20 You are receiving this mail because: You are the assignee for the bug.=
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