From mboxrd@z Thu Jan 1 00:00:00 1970 From: Juergen Gross Subject: Re: Elaboration of "Question about sharing spinlock_t among VMs in Xen" Date: Mon, 27 Jun 2016 20:22:40 +0200 Message-ID: <57716EF0.1050005@suse.com> References: <20160627140801.GB9762@char.us.oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Dagaen Golomb , Konrad Rzeszutek Wilk Cc: Xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org T24gMjcvMDYvMTYgMTc6MjQsIERhZ2FlbiBHb2xvbWIgd3JvdGU6Cj4+Pj4+ICoqKiBUaGUgcXVl c3Rpb24gaXMgYXMgZm9sbG93cyAqKioKPj4+Pj4gU3VwcG9zZSBJIGhhdmUgdHdvIExpbnV4IFZN cyBzaGFyaW5nIHRoZSBzYW1lIHNwaW5sb2NrX3QgbG9jayAodGhyb3VnaAo+Pj4+PiB0aGUgc2hh cmluZyBtZW1vcnkpIG9uIHRoZSBzYW1lIGhvc3QuIFN1cHBvc2Ugd2UgaGF2ZSBvbmUgcHJvY2Vz cyBpbgo+Pj4+PiBlYWNoIFZNLiBFYWNoIHByb2Nlc3MgdXNlcyB0aGUgbGludXggZnVuY3Rpb24g c3Bpbl9sb2NrKCZsb2NrKSBbMV0gdG8KPj4+Pj4gZ3JhYiAmIHJlbGVhc2UgdGhlIGxvY2suCj4+ Pj4+IFdpbGwgdGhlc2UgdHdvIHByb2Nlc3NlcyBpbiB0aGUgdHdvIFZNcyBoYXZlIHJhY2Ugb24g dGhlIHNoYXJlZCBsb2NrPwo+Pj4KPj4+PiBZb3UgY2FuJ3QgZG8gdGhpczogZGVwZW5kaW5nIG9u IHdoaWNoIExpbnV4IHZlcnNpb24geW91IHVzZSB5b3Ugd2lsbAo+Pj4+IGZpbmQgdGhhdCBrZXJu ZWwgdXNlcyB0aWNrZXRsb2NrcyBvciBxbG9ja3MgbG9ja3Mgd2hpY2gga2VlcCB0cmFjayBvZgo+ Pj4+IHdobyBpcyBob2xkaW5nIHRoZSBsb2NrIChvYnZpb3VzbHkgdGhpcyBpbmZvcm1hdGlvbiBp cyBpbnRlcm5hbCB0byBWTSkuCj4+Pj4gT24gdG9wIG9mIHRoaXMgb24gWGVuIHdlIHVzZSBwdmxv Y2tzIHdoaWNoIGFkZCBhbm90aGVyIChpbnRlcm5hbCkKPj4+PiBjb250cm9sIGxheWVyLgo+Pj4K Pj4+IEkgd2FudGVkIHRvIHNlZSBpZiB0aGlzIGNhbiBiZSBkb25lIHdpdGggdGhlIGNvcnJlY3Qg Y29tYmluYXRpb24gb2YKPj4+IHZlcnNpb25zIGFuZCBwYXJhbWV0ZXJzLiBXZSBhcmUgdXNpbmcg NC4xLjAgZm9yIGFsbCBkb21haW5zLCB3aGljaAo+Pj4gc3RpbGwgaGFzIHRoZSBDT05GSUdfUEFS QVZJUlRfU1BJTkxPQ0sgb3B0aW9uLiBJJ3ZlIHJlY29tcGlsZWQgdGhlCj4+PiBndWVzdHMgd2l0 aCB0aGlzIG9wdGlvbiBzZXQgdG8gbiwgYW5kIGhhdmUgYWxzbyBhZGRlZCB0aGUgYm9vdAoKSnVz dCBhIHBhcmFub2lkIHF1ZXN0aW9uOiBob3cgZXhhY3RseSBkb2VzIHRoZSAuY29uZmlnIGxpbmUg bG9vayBsaWtlPwpJdCBzaG91bGQgX25vdF8gYmUKCkNPTkZJR19QQVJBVklSVF9TUElOTE9DSz1u CgpidXQgcmF0aGVyOgoKIyBDT05GSUdfUEFSQVZJUlRfU1BJTkxPQ0sgaXMgbm90IHNldAoKPj4+ IHBhcmFtZXRlciB4ZW5fbm9wdnNwaW4gdG8gYm90aCBkb21haW5zIGFuZCBkb20wIGZvciBnb29k IG1lYXN1cmUuIEEKPj4+IGJhc2ljIHRpY2tldGxvY2sgaG9sZHMgYWxsIHRoZSBpbmZvcm1hdGlv biBpbnNpZGUgdGhlIHN0cnVjdCBpdHNlbGYgdG8KPj4+IG9yZGVyIHRoZSByZXF1ZXN0cywgYW5k IEkgYmVsaWV2ZSB0aGlzIGlzIHRoZSB2ZXJzaW9uIEknbSB1c2luZy4KPj4KPj4gSG0sIHdlaXJk LiBCL2MgZnJvbSBhcmNoL3g4Ni9pbmNsdWRlL2FzbS9zcGlubG9ja190eXBlcy5oOgo+PiAgIDYg I2lmZGVmIENPTkZJR19QQVJBVklSVF9TUElOTE9DS1MKPj4gICA3ICNkZWZpbmUgX19USUNLRVRf TE9DS19JTkMgICAgICAgMgo+PiAgIDggI2RlZmluZSBUSUNLRVRfU0xPV1BBVEhfRkxBRyAgICAo KF9fdGlja2V0X3QpMSkKPj4gICA5ICNlbHNlCj4+ICAxMCAjZGVmaW5lIF9fVElDS0VUX0xPQ0tf SU5DICAgICAgIDEKPj4gIDExICNkZWZpbmUgVElDS0VUX1NMT1dQQVRIX0ZMQUcgICAgKChfX3Rp Y2tldF90KTApCj4+ICAxMiAjZW5kaWYKPj4gIDEzCj4+Cj4+IFdoaWNoIG1lYW5zIHRoYXQgb25l IG9mIHlvdXIgZ3Vlc3RzIGlzIGFkZGluZyAnMicgd2hpbGUgYW5vdGhlciBpcwo+PiBhZGRpbmcg JzEnLiBPciBvbmUgb2YgdGhlbSBpcyBwdXR0aW5nIHRoZSAnc2xvd3BhdGgnIGZsYWcKPj4gd2hp Y2ggbWVhbnMgdGhhdCB0aGUgcGFyYXZpcnQgc3BpbmxvY2sgaXMgZW5hYmxlZC4KPiAKPiBJbnRl cmVzdGluZy4gSSB3ZW50IGJhY2sgdG8gY2hlY2sgb24gb25lIG9mIG15IGd1ZXN0cywgYW5kIHRo ZSAuY29uZmlnCj4gZnJvbSB0aGUgc291cmNlIHRyZWUgSSB1c2VkLCBhcyB3ZWxsIGFzIHRoZSBv bmUgaW4gL2Jvb3QvIGZvciB0aGUKPiBjdXJyZW50IGJ1aWxkIGJvdGggaGF2ZSBpdCAibm90IHNl dCIgd2hpY2ggc2hvd3MgYXMgdW5jaGVja2VkIGluIG1ha2UKPiBtZW51Y29uZmlnLCB3aGVyZSB0 aGUgb3B0aW9uIHdhcyBkaXNhYmxlZC4gU28gdGhpcyBkb21haW4gYXBwZWFycyB0bwo+IGJlIGNv cnJlY3RseSBjb25maWd1cmVkLiBUaGUgdGhpbmcgaXMsIHRoZSBvdGhlciBkb21haW4gaXMgbGl0 ZXJhbGx5IGEKPiBjb3B5IG9mIHRoaXMgZG9tYWluLiBFaXRoZXIgYm90aCBhcmUgd3Jvbmcgb3Ig bmVpdGhlciBhcmUuCgpPbmUgb3RoZXIgdGhpbmcgeW91IHNob3VsZCBiZSBhd2FyZSBvZjogYXMg c29vbiBhcyBvbmUgb2YgeW91ciBndWVzdHMKaGFzIG9ubHkgb25lIHZjcHUgaXQgd2lsbCBkcm9w IHRoZSAibG9jayIgcHJlZml4ZXMgZm9yIHVwZGF0ZXMgb2YgdGhlCmxvY2sgd29yZC4gU28gdGhl cmUgd2lsbCBiZSBhIGNoYW5jZSBvZiByYWNlcyBqdXN0IGJlY2F1c2Ugb25lIG9yIGJvdGgKZ3Vl c3RzIGFyZSB0aGlua2luZyBubyBvdGhlciBjcHUgY2FuIGFjY2VzcyB0aGUgbG9jayB3b3JkIGNv bmN1cnJlbnRseS4KCgpKdWVyZ2VuCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW4u b3JnCmh0dHA6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=