search for: msg00078

...NEED) with or without Linus's double buffering technique. qemu does use posix_fadvise(DONTNEED) in one place but AFAICT it is only used for live migration. ... > We already tried this with dd and the results were not good. These ones? https://www.redhat.com/archives/libguestfs/2020-August/msg00078.html Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html

On Fri, Aug 07, 2020 at 05:29:24PM +0300, Nir Soffer wrote: > On Fri, Aug 7, 2020 at 5:07 PM Richard W.M. Jones <rjones@redhat.com> wrote: > > These ones? > > https://www.redhat.com/archives/libguestfs/2020-August/msg00078.html > > No, we had a bug when copying image from glance caused sanlock timeouts > because of the unpredictable page cache flushes. > > We tried to use fadvice but it did not help. The only way to avoid such issues > is with O_SYNC or O_DIRECT. O_SYNC is much slower but this is...

Hello Han, Thanks for the response. The XML option with qemu:commandline works if the device is added during the VM creation. But I would like to hot-plug the device to the running VM. I can add the device using the command line <virsh qemu-monitor-command --hmp VM-Name device_add edu,id=edu0> But I would like to add the device using the XML file, like <virsh attach-device VM-Name

...com> wrote: > > > > On Fri, Aug 07, 2020 at 05:29:24PM +0300, Nir Soffer wrote: > > > On Fri, Aug 7, 2020 at 5:07 PM Richard W.M. Jones <rjones@redhat.com> wrote: > > > > These ones? > > > > https://www.redhat.com/archives/libguestfs/2020-August/msg00078.html > > > > > > No, we had a bug when copying image from glance caused sanlock timeouts > > > because of the unpredictable page cache flushes. > > > > > > We tried to use fadvice but it did not help. The only way to avoid such issues > > > is w...

...Jones <rjones@redhat.com> wrote: > > On Fri, Aug 07, 2020 at 05:29:24PM +0300, Nir Soffer wrote: > > On Fri, Aug 7, 2020 at 5:07 PM Richard W.M. Jones <rjones@redhat.com> wrote: > > > These ones? > > > https://www.redhat.com/archives/libguestfs/2020-August/msg00078.html > > > > No, we had a bug when copying image from glance caused sanlock timeouts > > because of the unpredictable page cache flushes. > > > > We tried to use fadvice but it did not help. The only way to avoid such issues > > is with O_SYNC or O_DIRECT. O_SYNC...

...in libvirt xml code? > > ASAIK there is no development guide for adding new device in libvirt xml code. Maybe you can refer to former watchdog device patch series: https://www.redhat.com/archives/libvir-list/2009-October/msg00564.html https://www.redhat.com/archives/libvir-list/2017-September/msg00078.html > Thanks, > Bharath > > On Wed, Oct 23, 2019 at 12:57 PM Han Han <hhan@redhat.com> wrote: > >> >> >> On Tue, Oct 22, 2019 at 5:41 PM bharath paulraj <bharathpaul@gmail.com> >> wrote: >> >>> Hi Team, >>> >>> I...

...------- dn = ... dnpass = ... ldap_version = 3 auth_bind = no base = ... pass_filter = ... pass_attrs = ... user_filter = ... user_attrs = ... default_pass_scheme = MD5-CRYPT user_global_uid = vmail user_global_gid = vmail Regards, maykel [1] http://www.openldap.org/lists/openldap-software/200811/msg00078.html --------------------------------------- Red Telematica de Salud - Cuba CNICM - Infomed

I?m trying to use rsync with windows vista. Vista?s odd form of ?links? confuses rsync and I get a recursive infinite loop at every such junction (until failure when the filename size limit is exceeded) . Could someone please point me to the solution or is there one? The std don?t follow links switch doesn?t seem to work. Eric -------------- next part -------------- HTML attachment scrubbed

...ment for O_DIRECT. > qemu does use > posix_fadvise(DONTNEED) in one place but AFAICT it is only used for > live migration. > > ... > > We already tried this with dd and the results were not good. > > These ones? > https://www.redhat.com/archives/libguestfs/2020-August/msg00078.html No, we had a bug when copying image from glance caused sanlock timeouts because of the unpredictable page cache flushes. We tried to use fadvice but it did not help. The only way to avoid such issues is with O_SYNC or O_DIRECT. O_SYNC is much slower but this is the path we took for now in th...

[Adding linux-ext4 mailing list. The original bug report is here: https://www.redhat.com/archives/libguestfs/2015-November/msg00078.html ] On Sat, Nov 07, 2015 at 01:22:45PM -0600, Jason Pepas wrote: > On Sat, Nov 7, 2015 at 5:03 AM, Richard W.M. Jones <rjones@redhat.com> wrote: > > How about 'strace mkfs.ext2 ..' and see if any system calls are > > returning errors. That would show you whether nb...

http://bugzilla.mindrot.org/show_bug.cgi?id=613 Summary: sshd hanging Product: Portable OpenSSH Version: 3.6.1p2 Platform: ix86 OS/Version: Linux Status: NEW Severity: critical Priority: P2 Component: PAM support AssignedTo: openssh-bugs at mindrot.org ReportedBy: airwin at inf.bme.hu On

On Sat, Nov 7, 2015 at 5:03 AM, Richard W.M. Jones <rjones@redhat.com> wrote: > How about 'strace mkfs.ext2 ..' and see if any system calls are > returning errors. That would show you whether nbd-client is throwing > errors away, or whether mkfs is getting the errors and ignoring them > (seems pretty unlikely, but you never know). > > After that, it'd be down

On Fri, Aug 07, 2020 at 07:53:13AM -0500, Eric Blake wrote: > >$ free -m; time ./nbdkit file /var/tmp/random fadvise=sequential cache=none --run 'qemu-img convert -n -p -m 16 -W $nbd "json:{\"file.driver\":\"null-co\",\"file.size\":\"1E\"}"' ; free -m ; cachestats /var/tmp/random > > Hmm - the -W actually says that qemu-img is

...ch I sent recently. [1] In the archive, the thread spilled from Sep to Oct: http://lists.xensource.com/archives/html/xen-devel/2005-09/threads.html#01106 http://lists.xensource.com/archives/html/xen-devel/2005-10/threads.html#00205 [2] http://lists.xensource.com/archives/html/xen-devel/2005-10/msg00078.html [3] the alignment of long long on 32-bit x86 is 4 bytes, not 8 http://lists.xensource.com/archives/html/xen-devel/2005-10/msg00117.html [4] the original incarnation of GUEST_HANDLE http://lists.xensource.com/archives/html/xen-devel/2005-10/msg00205.html -- Hollis Blanchard IBM Linux Techno...