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Groups > linux.debian.kernel > #65711
| From | Anton Ivanov <anton.ivanov@kot-begemot.co.uk> |
|---|---|
| Newsgroups | linux.debian.bugs.dist, linux.debian.kernel |
| Subject | Bug#945213: linux-image-5.2.0-3-amd64: OOM handling broken if hugepages are enabled |
| Date | 2019-11-23 00:00 +0100 |
| Message-ID | <z5q4b-7c2-9@gated-at.bofh.it> (permalink) |
| References | <z4QWJ-2y2-1@gated-at.bofh.it> <z5mWB-5kx-5@gated-at.bofh.it> <z4QWJ-2y2-1@gated-at.bofh.it> <z5mWB-5kx-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Cross-posted to 2 groups.
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On 22/11/2019 19:32, Ben Hutchings wrote: > Control: reassign -1 src:linux 5.2.17-1 > Control: tag -1 moreinfo > > On Thu, 2019-11-21 at 08:58 +0000, Anton Ivanov wrote: >> Package: linux-image-5.2.0-3-amd64 >> Version: 5.2.17+1 >> Severity: important >> >> Dear Maintainer, >> >> Dear Maintainer, >> >> OOM handling appears to be broken in 5.2.17-1 if hugepages are enabled. >> >> Test system: AMD A4-5300, 40G RAM, no swap, booted disklessly. >> >> Without hugepages enabled can compile dpdk without any issues. With huge >> pages enabled it will reproducibly OOM when trying to link one of the >> libraries. There are 20G+ free RAM at that point according to free with the >> rest being mostly used as buffers. >> >> It is sufficient to just enable huge pages to trigger this (2G out of 40G), >> they are not allocated or used by anything. > What do you mean by "if hugepages are enabled"? hugetlbfs and THP are > enabled by default. $ tail -2 sysctl.conf vm.nr_hugepages=1024 If you do not have that, compile completes fine. If you have that compile blows up when linking one of the dpdk libraries. At that point the machine has ~ 20G free RAM. > You need to provide a log of the OOM messages. Ack. I will re-run the tests tomorrow and update the bug with detailed logs and the OOM. > > Ben. > -- Anton R. Ivanov https://www.kot-begemot.co.uk/
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Bug#945213: linux-image-5.2.0-3-amd64: OOM handling broken if hugepages are enabled Anton Ivanov <anton.ivanov@kot-begemot.co.uk> - 2019-11-21 10:30 +0100
Bug#945213: linux-image-5.2.0-3-amd64: OOM handling broken if hugepages are enabled Ben Hutchings <ben@decadent.org.uk> - 2019-11-22 20:40 +0100
Bug#945213: linux-image-5.2.0-3-amd64: OOM handling broken if hugepages are enabled Anton Ivanov <anton.ivanov@kot-begemot.co.uk> - 2019-11-23 00:00 +0100
Processed: Re: Bug#945213: linux-image-5.2.0-3-amd64: OOM handling broken if hugepages are enabled "Debian Bug Tracking System" <owner@bugs.debian.org> - 2019-11-22 20:40 +0100
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