Date: Fri, 08 Dec 2023 12:42:42 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 275632] process being killed which has a big file mmap'ed and performs writes to it Message-ID: <bug-275632-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D275632 Bug ID: 275632 Summary: process being killed which has a big file mmap'ed and performs writes to it Product: Base System Version: 14.0-STABLE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: d8zNeCFG@aon.at Scenario: - FreeBSD stable/14 52369c5d29f5f, amd64 - 244 GB file on ZFS - The file is being mmap'ed in its entirety by a program called "cawic". - Read and write operations are performed on selected portions of this mapp= ing (specifically, the contents are - sequentially from the beginning to the en= d - read in blocks of size 128k and some of these blocks immediately rewritten = with updated data, such that ultimately all blocks will have been read and some = will have been rewritten). Result: - The process is killed, with the following message in dmesg: pid 28386 (cawic), jid 0, uid 20201, was killed: failed to reclaim memory - Swap space was not used Expected result: - The process should run to completion successfully. Notes: - This was working correctly (i.e., the process never was killed) some time before FreeBSD 12; with FreeBSD 12 the same issue occurred. - The ZFS filesystem on which the file resides has compression on. - If no blocks are ever written (all are only read), the process is not kil= led. --=20 You are receiving this mail because: You are the assignee for the bug.=
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