search for: tmem

This patch series implements the hypervisor portion of transcendent memory as described at http://oss.oracle.com/projects/tmem Tools patches to follow. All patches are sent as attachments as my mailer tends to mess with attached text. Apologies to those for whom this is inconvenient. Signed-off-by: Dan Magenheimer <dan.magenheimer.com> [1] Public interface for tmem [2] add pointer to tmem for each domain [3] add...

...de it upstream. See: http://lists.xen.org/archives/html/xen-devel/2011-11/msg00587.html http://lists.xen.org/archives/html/xen-devel/2011-11/msg02145.html It would be good if this very minor fix was also applied to 4.2 (and, if possible, 4.1). Thanks, Dan =================== The program xen-tmem-list-parse parses the output of xm/xl tmem-list into human-readable format. A missing NULL terminator sometimes causes garbage to be spewed where the two-letter pool type should be output. Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com> --- tools/misc/xen-tmem-list-parse.c |...

Add tmem-* commands, did some simple tests. [PATCH 1/6]xl: Add ''xl tmem-list'' command [PATCH 2/6]xl: Add ''xl tmem-freeze'' command [PATCH 3/6]xl: Add ''xl tmem-destroy'' command [PATCH 4/6]xl: Add ''xl tmem-thaw'' command [PATCH 5/6]xl: Add...

...g" physical memory in every major virtualization system existing today. These weaknesses have led in many cases to unacceptable performance issues when VMs are densely packed; as a result, memory is becoming the bottleneck in many deployments of virtualization. Transcendent Memory -- or "tmem" for short -- is phase II of that work and it essentially augments ballooning and "fixes" many of its weaknesses. It requires paravirtualization, but the changes (to Linux) are fairly small and minimally-invasive. The changes to Xen are larger, but also fairly non-invasive. (No sh...

...erybody for the many educational opportunities, the technical and political jousting, and the great times at conferences and summits! I wish you all the best of luck! Or to quote Douglas Adams: "So long and thanks for all the fish!" Cheers, Dan Magenheimer The Transcendent Memory ("tmem") guy Tmem-related historical webography: http://lwn.net/Articles/454795/ http://lwn.net/Articles/475681/ http://lwn.net/Articles/545244/ https://oss.oracle.com/projects/tmem/ http://www.linux-kvm.org/wiki/images/d/d7/TmemNotVirt-Linuxcon2011-Final.pdf http://lwn.net/Articles/465317/ htt...

[2] add pointer to tmem for each domain _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

[7] core tmem code _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

...a domain''s virtual block device", "<Domain> <DevId>", }, { "uptime", - &main_uptime, 0, + &main_uptime, 0, 0, "Print uptime for all/some domains", "[-s] [Domain]", }, { "tmem-list", - &main_tmem_list, 0, + &main_tmem_list, 0, 0, "List tmem pools", "[-l] [<Domain>|-a]", " -l List tmem stats", }, { "tmem-freeze", - &main_tmem_freeze, 0,...

From: Ian Campbell <ian.campbell@citrix.com> There are many hypercalls which make no sense or which are not supported on ARM systems but it''s not all that obvious which ones we do support. So lets try and document the hypercalls which are useful on ARM. I''m not sure this is the best way to go about this, I''m open to other ideas. Signed-off-by: Ian Campbell

If any new Xen developers are interested in a simple project to learn Xen development (and also Xen Transcendent Memory), it would be interesting to test this in Xen. AFAIK, the only extensive use of compression is with Transcendent Memory ("tmem"), so learning about tmem would be a useful side-effect. Thanks, Dan http://driverdev.linuxdriverproject.org/pipermail/devel/2011-April/015113.html From: Zeev Tarantov <zeev.tarantov at gmail.com> Google''s Snappy data compression library is a faster alternative to LZO, opti...

If any new Xen developers are interested in a simple project to learn Xen development (and also Xen Transcendent Memory), it would be interesting to test this in Xen. AFAIK, the only extensive use of compression is with Transcendent Memory ("tmem"), so learning about tmem would be a useful side-effect. Thanks, Dan http://driverdev.linuxdriverproject.org/pipermail/devel/2011-April/015113.html From: Zeev Tarantov <zeev.tarantov at gmail.com> Google''s Snappy data compression library is a faster alternative to LZO, opti...

Hi all, this is a non comprehensive list of missing features in libxenlight and\or xl: - xen_platform_pci flag support in VM config files; - relative paths support in VM config files; - hap support in VM config files; - -c option to xl create; - remus; - trigger command; - tmem-* commands; - sched-* commands; - usb-* commands; - scsi-* commands. In general if you execute "xm help" and "xl help" any command presents in the former but not in the latter is a missing feature. Few items are known to be "work in progress": - network-* comman...

...sible problem restoring a machine. In xc_domain_restore (xc_domain_restore.c) if it''s not the last checkpoint we set O_NONBLOCK flag (search for fcntl) that we can call pagebuf_get or just load other pages (see following "goto loadpages;" line). Now we could ending up calling xc_tmem_restore/xc_tmem_restore_extra (xc_tmem.c) which call read_extract (xc_private.c) on the same non blocking socket/file but read_extract does not handle EAGAIN/EWOULDBLOCK (both can be returned on non blocking socket depending on file type and Unix/Linux version) leading to a failure. Does this make...

...-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Tested-by: Bob Liu <bob.liu@oracle.com> CC: Keir Fraser <keir@xen.org> CC: Jan Beulich <JBeulich@suse.com> --- Changes in v2: * Colate acked/tested-by tags, refer to retroactive CIDs. No code change --- xen/include/xen/tmem_xen.h | 78 +++++++++++++++++++++++--------------------- 1 file changed, 40 insertions(+), 38 deletions(-) diff --git a/xen/include/xen/tmem_xen.h b/xen/include/xen/tmem_xen.h index b26c6fa..cccc98e 100644 --- a/xen/include/xen/tmem_xen.h +++ b/xen/include/xen/tmem_xen.h @@ -228,26 +228,24 @@ st...

[5] add radix-tree files from Linux with a few changes (documented at begin of file) _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

...t;unclaimed pages stays at zero -- unless a new claim is subsequently staked. See Note 2. The systemwide variable total_unclaimed_pages is always the sum of d->unclaimed_pages, across all domains. A non-domain- specific heap allocation will fail if total_unclaimed_pages exceeds free (plus, on tmem enabled systems, freeable) pages. Claim semantics may be modified by flags. The initial implementation has one flag, which discerns whether the caller would like tmem freeable pages to be considered in determining whether or not the claim can be successfully staked. Future flags may, for example,...

Hi, I have noticed that, in the code of linux/drivers/xen/balloon.c, there exists the snippet as this: static int __init balloon_init(void) { unsigned long pfn; struct page *page; if (!xen_pv_domain()) return -ENODEV; ..... } Does it means the driver will not work in HVM? If so, where is the HVN-enabled code for that? 2010-11-16 Rui Chu _______________________________________________

...y Linus, Please git pull the following tag: git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git stable/for-linus-3.10-rc5-tag which has two fixes for regressions that occured in v3.10. The signed tag has more details so replicating it here: <tag> Bug-fixes for regressions: - xen/tmem stopped working after a certain combination of modprobe/swapon was used - cpu online/offlining would trigger WARN_ON. </tag> Thanks! arch/x86/xen/smp.c | 8 ++++++++ drivers/xen/tmem.c | 4 ++-- 2 files changed, 10 insertions(+), 2 deletions(-) Konrad Rzeszutek Wilk (2): xen/smp: F...

...n for this problem? Some ideas: 1. With IOMMU pass iommu=pv to Xen. AFAIU domU will not need iommu=soft parameter then, right? Will it work then with fragmented memory? 2. Force somehow on xen/libxl to allocate memory (for domU) in chunks of, say 4MB, to not fragment it so badly. Is it doable? In tmem documentation is also described some workaround for this: reserve some memory region for allocations with 0<order<=9. But SWIOTLB tries to allocate 64MB, which much bigger than 2MB... Is it really needed to allocate such big region of contiguous memory in one piece? -- Pozdrawiam / Best Reg...

Hi, I''ve been trying to boot stefano''s minimal dom0 kernel from git://xenbits.xen.org/people/sstabellini/linux-pvhvm.git 2.6.36-rc1-initial-domain-v2+pat On xen-unstable, I get the following WARN_ON()''s from Xen when bringing up the NIC''s, then the machine hangs forever when trying to login either over serial or NIC. (XEN) Xen WARN at msi.c:649 (XEN) ----[