From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Johannes Thumshirn To: Wols Lists References: <5A6F4CA6.5060802@youngman.org.uk> Date: Tue, 30 Jan 2018 10:40:49 +0100 In-Reply-To: <5A6F4CA6.5060802@youngman.org.uk> (Wols Lists's message of "Mon, 29 Jan 2018 16:32:38 +0000") Message-ID: MIME-Version: 1.0 Cc: linux-raid@vger.kernel.org, linux-block@vger.kernel.org, Neil Brown , lsf-pc@lists.linux-foundation.org, Hannes Reinecke Subject: Re: [Lsf-pc] [LSF/MM TOPIC] De-clustered RAID with MD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Sender: lsf-pc-bounces@lists.linux-foundation.org Errors-To: lsf-pc-bounces@lists.linux-foundation.org List-ID: V29scyBMaXN0cyA8YW50bGlzdHNAeW91bmdtYW4ub3JnLnVrPiB3cml0ZXM6Cgo+IE9uIDI5LzAx LzE4IDE1OjIzLCBKb2hhbm5lcyBUaHVtc2hpcm4gd3JvdGU6Cj4+IEhpIGxpbnV4LXJhaWQsIGxz Zi1wYwo+PiAKPj4gKElmIHlvdSd2ZSByZWNlaXZlZCB0aGlzIG1haWwgbXVsdGlwbGUgdGltZXMs IEknbSBzb3JyeSwgSSdtIGhhdmluZwo+PiB0cm91YmxlIHdpdGggdGhlIG1haWwgc2V0dXApLgo+ Cj4gTXkgaW1tZWRpYXRlIHJlYWN0aW9ucyBhcyBhIGxheSBwZXJzb24gKEkgZWRpdCB0aGUgcmFp ZCB3aWtpKSAuLi4KPj4gCj4+IFdpdGggdGhlIHJpc2Ugb2YgYmlnZ2VyIGFuZCBiaWdnZXIgZGlz a3MsIGFycmF5IHJlYnVpbGRpbmcgdGltZXMgc3RhcnQKPj4gc2t5cm9ja2V0aW5nLgo+Cj4gQW5k PyBZZXMsIHlvdXIgZGF0YSBpcyBhdCByaXNrIGR1cmluZyBhIHJlYnVpbGQsIGJ1dCBtZC1yYWlk IHRocm90dGxlcwo+IHRoZSBpL28sIHNvIGl0IGRvZXNuJ3QgaGFtbWVyIHRoZSBzeXN0ZW0uCj4+ IAo+PiBJbiBhIHBhcGVyIGZvcm0gJzkyIEhvbGxhbmQgYW5kIEdpYnNvbiBbMV0gc3VnZ2VzdCBh IG1hcHBpbmcgYWxnb3JpdGhtCj4+IHNpbWlsYXIgdG8gUkFJRDUgYnV0IGluc3RlYWQgb2YgdXRp bGl6aW5nIGFsbCBkaXNrcyBpbiBhbiBhcnJheSBmb3IKPj4gZXZlcnkgSS9PIG9wZXJhdGlvbiwg YnV0IGltcGxlbWVudCBhIHBlci1JL08gbWFwcGluZyBmdW5jdGlvbiB0byBvbmx5Cj4+IHVzZSBh IHN1YnNldCBvZiB0aGUgYXZhaWxhYmxlIGRpc2tzLgo+PiAKPj4gVGhpcyBoYXMgYXQgbGVhc3Qg dHdvIGFkdmFudGFnZXM6Cj4+IDEpIElmIG9uZSBkaXNrIGhhcyB0byBiZSByZXBsYWNlZCwgaXQn cyBub3QgbmVlZGVkIHRvIHJlYWQgdGhlIGRhdGEgZnJvbQo+PiAgICBhbGwgZGlza3MgdG8gcmVj b3ZlciB0aGUgb25lIGZhaWxlZCBkaXNrIHNvIG5vbi1hZmZlY3RlZCBkaXNrcyBjYW4gYmUKPj4g ICAgdXNlZCBmb3IgcmVhbCB1c2VyIEkvTyBhbmQgbm90IGp1c3QgcmVjb3ZlcnkgYW5kCj4KPiBB Z2FpbiwgdGhhdCdzIHRocm90dGxpbmcsIHNvIHRoYXQncyBub3QgYSBwcm9ibGVtIC4uLgoKQW5k IHRocm90dGxpbmcgaW4gYSBwcm9kdWN0aW9uIGVudmlyb25tZW50IGlzIG5vdCBleGFjdGx5CmRl c2lyZWQuIEltYWdpbmUgYSA1MDAgZGlzayBhcnJheSAoYW5kIHllcyB0aGlzIGlzIHNvbWV0aGlu ZyB3ZSd2ZSBzZWVuCndpdGggTUQpIGFuZCB5b3UgaGF2ZSB0byByZXBsYWNlIGRpc2tzLiBXaGls ZSB0aGUgYXJyYXkgaXMgcmVidWlsdCB5b3UKaGF2ZSB0byB0aHJvdHRsZSBhbGwgSS9PIGJlY2F1 c2Ugd2l0aCByYWlkLXsxLDUsNiwxMH0gYWxsIGRhdGEgaXMKc3RyaXBlZCBhY3Jvc3MgYWxsIGRp c2tzLgoKV2l0aCBhIHBhcml0eSBkZWNsdXN0ZXJlZCBSQUlEIChvciBERFAgbGlrZSBEZWxsLCBO ZXRBcHAgb3IgSHVhd2VpIGNhbGwKaXQpIHlvdSBkb24ndCBoYXZlIHRvIGFzIHRoZSBJL08gaXMg cmVwbGljYXRlZCBpbiBwYXJpdHkgZ3JvdXBzIGFjcm9zcyBhCnN1YnNldCBvZiBkaXNrcy4gQWxs IEkvTyB0YXJnZXRpbmcgZGlza3Mgd2hpY2ggYXJlbid0IG5lZWRlZCB0byByZWNvdmVyCnRoZSBk YXRhIGZyb20gdGhlIGZhaWxlZCBkaXNrcyBhcmVuJ3QgYWZmZWN0ZWQgYnkgdGhlIHRocm90dGxp bmcgYXQgYWxsLgoKPj4gMikgYW4gZWZmaWNpZW50IG1hcHBpbmcgZnVuY3Rpb24gY2FuIGltcHJv dmUgcGFyYWxsZWwgSS9PIHN1Ym1pc3Npb24sIGFzCj4+ICAgIHR3byBkaWZmZXJlbnQgSS9PcyBh cmUgbm90IG5lY2Vzc2FyaWx5IGdvaW5nIHRvIHRoZSBzYW1lIGRpc2tzIGluIHRoZQo+PiAgICBh cnJheS4gCj4+IAo+PiBGb3IgdGhlIG1hcHBpbmcgZnVuY3Rpb24gdXNlZCBhIGhhc2hpbmcgYWxn b3JpdGhtIGxpa2UgQ2VwaCdzIENSVVNIIFsyXQo+PiB3b3VsZCBiZSBpZGVhbCwgYXMgaXQgcHJv dmlkZXMgYSBwc2V1ZG8gcmFuZG9tIGJ1dCBkZXRlcm1pbmlzdGljIG1hcHBpbmcKPj4gZm9yIHRo ZSBJL08gb250byB0aGUgZHJpdmVzLgo+PiAKPj4gVGhpcyB3aG9sZSBkZWNsdXN0ZXJpbmcgb2Yg Y2F1c2Ugb25seSBtYWtlcyBzZW5zZSBmb3IgbW9yZSB0aGFuIChhdAo+PiBsZWFzdCkgNCBkcml2 ZXMgYnV0IHdlIGRvIGhhdmUgY3VzdG9tZXJzIHdpdGggc2V2ZXJhbCBvcmRlcnMgb2YKPj4gbWFn bml0dWRlIG1vcmUgZHJpdmVycyBpbiBhbiBNRCBhcnJheS4KPgo+IElmIHlvdSBoYXZlIGZvdXIg ZHJpdmVzIG9yIG1vcmUgLSBlc3BlY2lhbGx5IGlmIHRoZXkgYXJlIG11bHRpLXRlcmFieXRlCj4g ZHJpdmVzIC0geW91IHNob3VsZCBOT1QgYmUgdXNpbmcgcmFpZC01IC4uLgoKcmFpZC02IHdvbid0 IGhlbHAgeW91IG11Y2ggaW4gYWJvdmUgc2NlbmFyaW8uCgo+PiAKPj4gQXQgTFNGIEknZCBsaWtl IHRvIGRpc2N1c3MgaWY6Cj4+IDEpIFRoZSB3aWRlciBNRCBhdWRpZW5jZSBpcyBpbnRlcmVzdGVk IGluIGRlLWNsdXN0ZXJkIFJBSUQgd2l0aCBNRAo+Cj4gSSBoYXZlbid0IHJlYWQgdGhlIHBhcGVy cywgc28gbm8gY29tbWVudCwgc29ycnkuCj4KPj4gMikgZGUtY2x1c3RlcmVkIFJBSUQgc2hvdWxk IGJlIGltcGxlbWVudGVkIGFzIGEgc3VibGV2ZWwgb2YgUkFJRDUgb3IKPj4gICAgYXMgYSBuZXcg cGVyc29uYWxpdHkKPgo+IE5laXRoZXIhIElmIHlvdSdyZSBnb2luZyB0byBkbyBpdCwgaXQgc2hv dWxkIGJlIHJhaWQtNi4KPgo+PiAzKSBDUlVTSCBpcyBhIHN1aXRpYmxlIGFsZ29yaXRoIGZvciB0 aGlzICh0aGVyZSdzIGV2aWRlbmNlIGluIFszXSB0aGF0Cj4+ICAgIHRoZSBOZXRBcHAgRS1TZXJp ZXMgQXJyYXlzIGRvIHVzZSBDUlVTSCBmb3IgcGFyaXR5IGRlY2x1c3RlcmluZykKPj4gCj4+IFsx XSBodHRwOi8vd3d3LnBkbC5jbXUuZWR1L1BETC1GVFAvRGVjbHVzdGVyaW5nL0FTUExPUy5wZGYg Cj4+IFsyXSBodHRwczovL2NlcGguY29tL3dwLWNvbnRlbnQvdXBsb2Fkcy8yMDE2LzA4L3dlaWwt Y3J1c2gtc2MwNi5wZGYKPj4gWzNdCj4+IGh0dHBzOi8vd3d3LnNuaWEub3JnL3NpdGVzL2RlZmF1 bHQvZmlsZXMvZmlsZXMyL2ZpbGVzMi9TREMyMDEzL3ByZXNlbnRhdGlvbnMvRGlzdHJpYnV0ZWRT dG9yYWdlL0ppYmJlLUd3YWx0bmV5X01ldGhvZC10b19Fc3RhYmxpc2hfSGlnaF9BdmFpbGFiaWxp dHkucGRmCj4+IAo+IE9rYXkgLSBJJ3ZlIG5vdyBza2ltbWVkIHRoZSBjcnVzaCBwYXBlciBbMl0u IExvb2tzIHdlbGwgaW50ZXJlc3RpbmcuCj4gQlVULiBJdCBmZWVscyBtb3JlIGxpa2UgYnRyZnMg dGhhbiBpdCBkb2VzIGxpa2UgcmFpZC4KPgo+IEJ0cmZzIG1hbmFnZXMgZGlza3MsIGFuZCBkb2Vz IHJhaWQsIGl0IHRyaWVzIHRvIGJlIHRoZSAiZXZlcnl0aGluZwo+IGJldHdlZW4gdGhlIGhhcmQg ZHJpdmUgYW5kIHRoZSBmaWxlIi4gVGhpcyBjcnVzaCB0aGluZ3kgcmVhZHMgdG8gbWUgbGlrZQo+ IGl0IHdhbnRzIHRvIGJlIHRoZSBzYW1lLiBUaGVyZSdzIG5vdGhpbmcgd3Jvbmcgd2l0aCB0aGF0 LCBidXQgbWQgaXMgYQo+IHVuaXgteSAiZG8gb25lIHRoaW5nIChyYWlkKSBhbmQgZG8gaXQgd2Vs bCIuCgpXZWxsIENSVVNIIGlzIChvbmUgb2YpIHRoZSBhbGdvcml0aG1zIGJlaGluZCBDZXBoLiBJ dCB0YWtlcyB0aGUKZGVjaXNpb25zIHdoZXJlIHRvIHBsYWNlIGEgYmxvY2suIEl0IGlzIGp1c3Qg YSBoYXNoICh3ZWxsIHRlY2huaWNhbGx5IGEKd2VpZ2h0ZWQgZGVjaXNpb24tdHJlZSkgZnVuY3Rp b24gdGhhdCB0YWtlcyBhIGJsb2NrIG9mIEkvTyBhbmQgYSBzb21lCmNvbmZpZ3VyYXRpb24gcGFy YW1ldGVycyBhbmQgImNhbGN1bGF0ZXMiIHRoZSBwbGFjZW1lbnQuCgo+IE15IGtuZWUtamVyayBy ZWFjdGlvbiBpcyBpZiB5b3Ugd2FudCB0byBnbyBmb3IgaXQsIGl0IHNvdW5kcyBsaWtlIGEgZ29v ZAo+IGlkZWEuIEl0IGp1c3QgZG9lc24ndCByZWFsbHkgZmVlbCBhIGdvb2QgZml0IGZvciBtZC4K ClRoYW5rcyBmb3IgdGhlIGlucHV0LgoKICAgICAgIEpvaGFubmVzCi0tIApKb2hhbm5lcyBUaHVt c2hpcm4gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICBTdG9yYWdlCmp0 aHVtc2hpcm5Ac3VzZS5kZSAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgKzQ5IDkxMSA3 NDA1MyA2ODkKU1VTRSBMSU5VWCBHbWJILCBNYXhmZWxkc3RyLiA1LCA5MDQwOSBOw7xybmJlcmcK R0Y6IEZlbGl4IEltZW5kw7ZyZmZlciwgSmFuZSBTbWl0aGFyZCwgR3JhaGFtIE5vcnRvbgpIUkIg MjEyODQgKEFHIE7DvHJuYmVyZykKS2V5IGZpbmdlcnByaW50ID0gRUMzOCA5Q0FCIEMyQzQgRjI1 RCA4NjAwIEQwRDAgMDM5MyA5NjlEIDJENzYgMDg1MApfX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fXwpMc2YtcGMgbWFpbGluZyBsaXN0CkxzZi1wY0BsaXN0cy5s aW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRhdGlvbi5vcmcvbWFp bG1hbi9saXN0aW5mby9sc2YtcGMK