Date: Tue, 06 Nov 2018 03:15:17 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 195882] Local DoS from unprivileged user Message-ID: <bug-195882-227-1ugo9ugerl@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-195882-227@https.bugs.freebsd.org/bugzilla/> References: <bug-195882-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D195882 --- Comment #8 from rozhuk.im@gmail.com --- (In reply to Mark Johnston from comment #7) Main problem is that dirty pages does not go to free after if flushed to di= sk, and it cause swap usage. On 10.1 - system can not allocate mem even after system stop write to disk. Probably now I should count free mem as: free + laundry. Another bug: I have 6,5 Gb free, program write 6 Gb, rename file and restart program. Program fail some time later, but system can not flush pages to di= sk - no space, and whole time move mem: ... CPU: 0.0% user, 0.0% nice, 10.5% system, 7.0% interrupt, 82.5% idle Mem: 1945M Active, 120K Inact, 1537M Laundry, 315M Wired, 199M Buf, 47M Free ... CPU: 0.0% user, 0.0% nice, 14.3% system, 6.3% interrupt, 79.5% idle Mem: 2765M Active, 36K Inact, 717M Laundry, 315M Wired, 199M Buf, 48M Free 16 root 49 - 0 72K CPU3 3 12:26 59.96% [pagedaemon{laundry: dom0}] ... and eat CPU. Until file was deleted. About kernel dump. I try: swapoff -a swapoff: /dev/gptid/0714a812-b98e-11e8-a831-7085c2375722.eli: Cannot alloca= te memory System has 32 Gb RAM, 1,8 Gb in swap and summ of RES all running apps is le= ss than 20 Gb. Only after I stop one vbox vm and get 4+gb free mem it work without error. --=20 You are receiving this mail because: You are the assignee for the bug.=
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