search for: rlimit_memlock

...PI resources. In this case, libvirtd is running inside an unprivileged pod, with some host mounts / capabilities added to the pod, needed by libvirtd and other services. One of the capabilities libvirtd requires for successful startup inside a pod is SYS_RESOURCE. This capability is used to adjust RLIMIT_MEMLOCK ulimit value depending on devices attached to the managed guest, both on startup and during hotplug. AFAIU the need to lock the memory is to avoid pages being pushed out from RAM into swap. In KubeVirt world, several libvirtd assumptions do not apply: 1. In Kubernetes environments, swap is usuall...

...bvirtd is running inside an > unprivileged pod, with some host mounts / capabilities added to the > pod, needed by libvirtd and other services. > > One of the capabilities libvirtd requires for successful startup > inside a pod is SYS_RESOURCE. This capability is used to adjust > RLIMIT_MEMLOCK ulimit value depending on devices attached to the > managed guest, both on startup and during hotplug. AFAIU the need to > lock the memory is to avoid pages being pushed out from RAM into swap. Libvirt shouldn't set RLIMIT_MEMLOCK by default, unless there's something in the XML that...

...ileged pod, with some host mounts / capabilities added to the >>> pod, needed by libvirtd and other services. >>> >>> One of the capabilities libvirtd requires for successful startup >>> inside a pod is SYS_RESOURCE. This capability is used to adjust >>> RLIMIT_MEMLOCK ulimit value depending on devices attached to the >>> managed guest, both on startup and during hotplug. AFAIU the need to >>> lock the memory is to avoid pages being pushed out from RAM into swap. I recall successfully testing GPU assignment from an unprivileged libvirtd sever...

...gt; > unprivileged pod, with some host mounts / capabilities added to the > > pod, needed by libvirtd and other services. > > > > One of the capabilities libvirtd requires for successful startup > > inside a pod is SYS_RESOURCE. This capability is used to adjust > > RLIMIT_MEMLOCK ulimit value depending on devices attached to the > > managed guest, both on startup and during hotplug. AFAIU the need to > > lock the memory is to avoid pages being pushed out from RAM into swap. > > Libvirt shouldn't set RLIMIT_MEMLOCK by default, unless there's > so...

...bilities added to the >>>>> pod, needed by libvirtd and other services. >>>>> >>>>> One of the capabilities libvirtd requires for successful startup >>>>> inside a pod is SYS_RESOURCE. This capability is used to adjust >>>>> RLIMIT_MEMLOCK ulimit value depending on devices attached to the >>>>> managed guest, both on startup and during hotplug. AFAIU the need to >>>>> lock the memory is to avoid pages being pushed out from RAM into swap. >> >> >> I recall successfully testing GPU assign...

...t mounts / capabilities added to the > >>> pod, needed by libvirtd and other services. > >>> > >>> One of the capabilities libvirtd requires for successful startup > >>> inside a pod is SYS_RESOURCE. This capability is used to adjust > >>> RLIMIT_MEMLOCK ulimit value depending on devices attached to the > >>> managed guest, both on startup and during hotplug. AFAIU the need to > >>> lock the memory is to avoid pages being pushed out from RAM into swap. > > > I recall successfully testing GPU assignment from an unpri...

...; >>>>> pod, needed by libvirtd and other services. > >>>>> > >>>>> One of the capabilities libvirtd requires for successful startup > >>>>> inside a pod is SYS_RESOURCE. This capability is used to adjust > >>>>> RLIMIT_MEMLOCK ulimit value depending on devices attached to the > >>>>> managed guest, both on startup and during hotplug. AFAIU the need to > >>>>> lock the memory is to avoid pages being pushed out from RAM into > swap. > >> > >> > >> I recall s...

...and on most of the nodes we haven't yet rebooted them due to log running processes but a few nodes have been restarted and now that jobs are starting to be put on them we are back to max locked memory of 32k rather than 16gb. The error we are receiving on those jobs is : libibverbs: Warning: RLIMIT_MEMLOCK is 32768 bytes. This will severely limit memory registrations. libibverbs: Warning: RLIMIT_MEMLOCK is 32768 bytes. This will severely limit memory registrations. Fatal error in MPI_Init: Other MPI error, error stack: MPIR_Init_thread(306).......: Initialization failed MPID_Init(113)...........

...t][Uu][Ll][Pp] + * (eg. 'C2F256D2048N5' or 'C2 F256 D2048 N5') + * where: + * [Aa]: a = RLIMIT_AS max address space (KB) + * [Cc]: c = RLIMIT_CORE max core file size (KB) + * [Dd]: d = RLIMIT_DATA max data size (KB) + * [Ff]: f = RLIMIT_FSIZE Maximum filesize (KB) + * [Mm]: m = RLIMIT_MEMLOCK max locked-in-memory address space (KB) + * [Nn]: n = RLIMIT_NOFILE max number of open files + * [Rr]: r = RLIMIT_RSS max resident set size (KB) + * [Ss]: s = RLIMIT_STACK max stack size (KB) + * [Tt]: t = RLIMIT_CPU max CPU time (MIN) + * [Uu]: u = RLIMIT_NPROC max number of processes + * [Ll]:...

...ue='-device'/> <qemu:arg value='vfio-pci,host=05:00.0,bus=pcie.0'/> </qemu:commandline> but I insist on running the VM as non-root, and if I got that right I need to configure at least one vfio device (or memory locking) in order for libvirt to set a proper RLIMIT_MEMLOCK value. Any help would be be appreciated. Regards, Thomas

...m_cur=50000*1024, rlim_max=50000*1024}) = -1 EPERM (Operation not permitted) 11860 setrlimit(RLIMIT_RSS, {rlim_cur=2147483647, rlim_max=2147483647}) = 0 11860 setrlimit(RLIMIT_NPROC, {rlim_cur=257, rlim_max=257}) = 0 11860 setrlimit(RLIMIT_NOFILE, {rlim_cur=1024, rlim_max=1024}) = 0 11860 setrlimit(RLIMIT_MEMLOCK, {rlim_cur=2147483647, rlim_max=2147483647}) = 0 11860 setrlimit(RLIMIT_AS, {rlim_cur=2147483647, rlim_max=2147483647}) = 0 11860 setrlimit(0xa /* RLIMIT_??? */, {rlim_cur=2147483647, rlim_max=2147483647}) = 0 11860 setpriority(PRIO_PROCESS, 0, 0) = 0 11860 open("/etc/security/pam_mail.conf&...

Hi, secpwgen is always reporting "mlock: Cannot allocate memory" even with user root. CentOS 6.2. Problem with selinux? Thank you for help in advance. Best regards Helmut Drodofsky

...S30' Revision : '1.01' Device seems to be: Generic mmc2 DVD-R/DVD-RW. But cdrecord says that their is no media present although I have empirically determined that a blank dvd is in fact loaded into the device: cdrecord -load wodim: Operation not permitted. Warning: Cannot raise RLIMIT_MEMLOCK limits.Device was not specified. Trying to find an appropriate drive... Detected CD-R drive: /dev/cdrw Using /dev/cdrom of unknown capabilities Device type : Removable CD-ROM Version : 5 Response Format: 2 Capabilities : Vendor_info : 'HL-DT-ST' Identification : 'DVD-RAM...

...izeof(struct vm_area_struct *), > - GFP_KERNEL); > - if (!page_list || !vmas) { > - ret = -ENOMEM; > - goto free; > - } > - > mmap_read_lock(dev->mm); > > + locked = atomic64_add_return(npages, &dev->mm->pinned_vm); > lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT; > - if (npages + atomic64_read(&dev->mm->pinned_vm) > lock_limit) { > - ret = -ENOMEM; > - goto unlock; > - } > > - pinned = pin_user_pages(msg->uaddr & PAGE_MASK, npages, gup_flags, > - page_list, vmas); > - if (npages != pi...

...> <qemu:arg value='vfio-pci,host=05:00.0,bus=pcie.0'/> > </qemu:commandline> > > but I insist on running the VM as non-root, and if I got that right I > need to configure at least one vfio device (or memory locking) in > order for libvirt to set a proper RLIMIT_MEMLOCK value. > > Any help would be be appreciated. For now at least, you'll need to let it plug into the pci-bridge device pci.2 (which, as you've found, libvirt will automatically find when you don't specify any address). Unfortunately that doesn't do you much good, since that par...

...ge *), GFP_KERNEL); + vmas = kvmalloc_array(npages, sizeof(struct vm_area_struct *), + GFP_KERNEL); + if (!page_list || !vmas) { + ret = -ENOMEM; + goto free; + } + mmap_read_lock(dev->mm); - locked = atomic64_add_return(npages, &dev->mm->pinned_vm); lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT; - - if (locked > lock_limit) { + if (npages + atomic64_read(&dev->mm->pinned_vm) > lock_limit) { ret = -ENOMEM; - goto out; + goto unlock; } - cur_base = msg->uaddr & PAGE_MASK; - iova &= PAGE_MASK; + pinned = pin_user_pages(msg->uaddr &a...

...ge *), GFP_KERNEL); + vmas = kvmalloc_array(npages, sizeof(struct vm_area_struct *), + GFP_KERNEL); + if (!page_list || !vmas) { + ret = -ENOMEM; + goto free; + } + mmap_read_lock(dev->mm); - locked = atomic64_add_return(npages, &dev->mm->pinned_vm); lock_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT; - - if (locked > lock_limit) { + if (npages + atomic64_read(&dev->mm->pinned_vm) > lock_limit) { ret = -ENOMEM; - goto out; + goto unlock; } - cur_base = msg->uaddr & PAGE_MASK; - iova &= PAGE_MASK; + pinned = pin_user_pages(msg->uaddr &a...

Any user with shell access, or with access to upload a cgi script can exploit this to make machine thrash badly. Seems to circumvent any limits in the kernel Here are my settings dlai@whale.home.org:/home/dlai?limit cputime unlimited filesize 20000 kbytes datasize 8192 kbytes stacksize 8192 kbytes coredumpsize 1000000 kbytes memoryuse 8192 kbytes descriptors

...g value='vfio-pci,host=05:00.0,bus=pcie.0'/> >> </qemu:commandline> >> >> but I insist on running the VM as non-root, and if I got that right I >> need to configure at least one vfio device (or memory locking) in >> order for libvirt to set a proper RLIMIT_MEMLOCK value. >> >> Any help would be be appreciated. > > For now at least, you'll need to let it plug into the pci-bridge device > pci.2 (which, as you've found, libvirt will automatically find when you > don't specify any address). Unfortunately that doesn't do...