From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?B?5L+e6LaF?= Subject: Re: [PATCH] f2fs: optimize fs_lock for better performance Date: Thu, 12 Sep 2013 10:40:27 +0800 Message-ID: <001001ceaf61$a4ea9a90$eebfcfb0$@samsung.com> References: <88.C4.11914.9D4A9225@epcpsbge6.samsung.com> <1378774324.2354.103.camel@kjgkr> <523001B6.3080506@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Cc: linux-fsdevel@vger.kernel.org, shu.tan@samsung.com, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net To: 'Gu Zheng' , jaegeuk.kim@samsung.com Return-path: In-reply-to: <523001B6.3080506@cn.fujitsu.com> Content-language: zh-cn List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net List-Id: linux-fsdevel.vger.kernel.org SGkgR3UKCj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0KPiBGcm9tOiBHdSBaaGVuZyBbbWFp bHRvOmd1ei5mbnN0QGNuLmZ1aml0c3UuY29tXQo+IFNlbnQ6IFdlZG5lc2RheSwgU2VwdGVtYmVy IDExLCAyMDEzIDE6MzggUE0KPiBUbzogamFlZ2V1ay5raW1Ac2Ftc3VuZy5jb20KPiBDYzogY2hh bzIueXVAc2Ftc3VuZy5jb207IHNodS50YW5Ac2Ftc3VuZy5jb207Cj4gbGludXgtZnNkZXZlbEB2 Z2VyLmtlcm5lbC5vcmc7IGxpbnV4LWtlcm5lbEB2Z2VyLmtlcm5lbC5vcmc7Cj4gbGludXgtZjJm cy1kZXZlbEBsaXN0cy5zb3VyY2Vmb3JnZS5uZXQKPiBTdWJqZWN0OiBSZTogW2YyZnMtZGV2XVtQ QVRDSF0gZjJmczogb3B0aW1pemUgZnNfbG9jayBmb3IgYmV0dGVyIHBlcmZvcm1hbmNlCj4gCj4g SGkgSmFlZ2V1aywgQ2hhbywKPiAKPiBPbiAwOS8xMC8yMDEzIDA4OjUyIEFNLCBKYWVnZXVrIEtp bSB3cm90ZToKPiAKPiA+IEhpLAo+ID4KPiA+IEF0IGZpcnN0LCB0aGFuayB5b3UgZm9yIHRoZSBy ZXBvcnQgYW5kIHBsZWFzZSBmb2xsb3cgdGhlIGVtYWlsIHdyaXRpbmcKPiA+IHJ1bGVzLiA6KQo+ ID4KPiA+IEFueXdheSwgSSBhZ3JlZSB0byB0aGUgYmVsb3cgaXNzdWUuCj4gPiBPbmUgdGhpbmcg dGhhdCBJIGNhbiB0aGluayBvZiBpcyB0aGF0IHdlIGRvbid0IG5lZWQgdG8gdXNlIHRoZQo+ID4g c3Bpbl9sb2NrLCBzaW5jZSB3ZSBkb24ndCBjYXJlIGFib3V0IHRoZSBleGFjdCBsb2NrIG51bWJl ciwgYnV0IGp1c3QKPiA+IG5lZWQgdG8gZ2V0IGFueSBub3QtY29sbGlkZWQgbnVtYmVyLgo+IAo+ IElNSE8sIGp1c3QgbW92aW5nIHNiaS0+bmV4dF9sb2NrX251bSsrIGJlZm9yZQo+IG11dGV4X2xv Y2soJnNiaS0+ZnNfbG9ja1tuZXh0X2xvY2tdKQo+IGNhbiBhdm9pZCB1bmJhbGFuY2UgaXNzdWUg bW9zdGx5Lgo+IElNTywgdGhlIGNhc2UgdHdvIG9yIG1vcmUgdGhyZWFkcyBpbmNyZWFzZSBzYmkt Pm5leHRfbG9ja19udW0gaW4gdGhlIHNhbWUKPiB0aW1lIGlzIHJlYWxseSB2ZXJ5IHZlcnkgbGl0 dGxlLiBJZiB5b3UgdGhpbmsgaXQgaXMgbm90IHJpZ29yb3VzLCBjaGFuZ2UKPiBuZXh0X2xvY2tf bnVtIHRvIGF0b21pYyBvbmUgY2FuIGZpeCBpdC4KPiBXaGF0J3MgeW91ciBvcGluaW9uPwo+IAo+ IFJlZ2FyZHMsCj4gR3UKCkkgZGlkIHRoZSB0ZXN0IHNiaS0+bmV4dF9sb2NrX251bSsrIGNvbXBh cmUgd2l0aCB0aGUgYXRvbWljIG9uZSwKQW5kIEkgZm91bmQgcGVyZm9ybWFuY2Ugb2YgdGhlbSBp cyBhbG1vc3QgdGhlIHNhbWUgdW5kZXIgYSBzbWFsbCBudW1iZXIgdGhyZWFkIHJhY2luZy4KU28g YXMgeW91ciBhbmQgS2ltJ3Mgb3BpbmlvbiwgaXQncyBlbm91Z2ggdG8gdXNlICJzYmktPm5leHRf bG9ja19udW0rKyIgdG8gZml4IHRoaXMgaXNzdWUuCgpUaGFua3MgZm9yIHRoZSBhZHZpY2UuCj4g Cj4gPgo+ID4gU28sIGhvdyBhYm91dCByZW1vdmluZyB0aGUgc3Bpbl9sb2NrPwo+ID4gQW5kIGhv dyBhYm91dCB1c2luZyBhIHJhbmRvbSBudW1iZXI/Cj4gCj4gPiBUaGFua3MsCj4gPgo+ID4gMjAx My0wOS0wNiAo6riIKSwgMDk6NDggKzAwMDAsIENoYW8gWXU6Cj4gPj4gSGkgS2ltOgo+ID4+Cj4g Pj4gICAgICBJIHRoaW5rIHRoZXJlIGlzIGEgcGVyZm9ybWFuY2UgcHJvYmxlbTogd2hlbiBhbGwg c2JpLT5mc19sb2NrIGlzCj4gPj4gaG9sZGVkLAo+ID4+Cj4gPj4gdGhlbiBhbGwgb3RoZXIgdGhy ZWFkcyBtYXkgZ2V0IHRoZSBzYW1lIG5leHRfbG9jayB2YWx1ZSBmcm9tCj4gPj4gc2JpLT5uZXh0 X2xvY2tfbnVtIGluIGZ1bmN0aW9uIG11dGV4X2xvY2tfb3AsCj4gPj4KPiA+PiBhbmQgd2FpdCB0 byBnZXQgdGhlIHNhbWUgbG9jayBhdCBwb3NpdGlvbiBmc19sb2NrW25leHRfbG9ja10sIGl0Cj4g Pj4gdW5iYWxhbmNlIHRoZSBmc19sb2NrIHVzYWdlLgo+ID4+Cj4gPj4gSXQgbWF5IGxvc3QgcGVy Zm9ybWFuY2Ugd2hlbiB3ZSBkbyB0aGUgbXVsdGl0aHJlYWQgdGVzdC4KPiA+Pgo+ID4+Cj4gPj4K PiA+PiBIZXJlIGlzIHRoZSBwYXRjaCB0byBmaXggdGhpcyBwcm9ibGVtOgo+ID4+Cj4gPj4KPiA+ Pgo+ID4+IFNpZ25lZC1vZmYtYnk6IFl1IENoYW8gPGNoYW8yLnl1QHNhbXN1bmcuY29tPgo+ID4+ Cj4gPj4gZGlmZiAtLWdpdCBhL2ZzL2YyZnMvZjJmcy5oIGIvZnMvZjJmcy9mMmZzLmgKPiA+Pgo+ ID4+IG9sZCBtb2RlIDEwMDY0NAo+ID4+Cj4gPj4gbmV3IG1vZGUgMTAwNzU1Cj4gPj4KPiA+PiBp bmRleCA0NjdkNDJkLi45ODNiYjQ1Cj4gPj4KPiA+PiAtLS0gYS9mcy9mMmZzL2YyZnMuaAo+ID4+ Cj4gPj4gKysrIGIvZnMvZjJmcy9mMmZzLmgKPiA+Pgo+ID4+IEBAIC0zNzEsNiArMzcxLDcgQEAg c3RydWN0IGYyZnNfc2JfaW5mbyB7Cj4gPj4KPiA+PiAgICAgICAgIHN0cnVjdCBtdXRleCBmc19s b2NrW05SX0dMT0JBTF9MT0NLU107ICAvKiBibG9ja2luZyBGUwo+ID4+IG9wZXJhdGlvbnMgKi8K PiA+Pgo+ID4+ICAgICAgICAgc3RydWN0IG11dGV4IG5vZGVfd3JpdGU7ICAgICAgICAgICAgICAg IC8qIGxvY2tpbmcgbm9kZQo+IHdyaXRlcwo+ID4+ICovCj4gPj4KPiA+PiAgICAgICAgIHN0cnVj dCBtdXRleCB3cml0ZXBhZ2VzOyAgICAgICAgICAgICAgICAvKiBtdXRleCBmb3IKPiA+PiB3cml0 ZXBhZ2VzKCkgKi8KPiA+Pgo+ID4+ICsgICAgICAgc3BpbmxvY2tfdCBzcGluX2xvY2s7ICAgICAg ICAgICAgICAgICAgIC8qIGxvY2sgZm9yCj4gPj4gbmV4dF9sb2NrX251bSAqLwo+ID4+Cj4gPj4g ICAgICAgICB1bnNpZ25lZCBjaGFyIG5leHRfbG9ja19udW07ICAgICAgICAgICAgLyogcm91bmQt cm9iaW4KPiBnbG9iYWwKPiA+PiBsb2NrcyAqLwo+ID4+Cj4gPj4gICAgICAgICBpbnQgcG9yX2Rv aW5nOyAgICAgICAgICAgICAgICAgICAgICAgICAgLyogcmVjb3ZlcnkgaXMgZG9pbmcKPiA+PiBv ciBub3QgKi8KPiA+Pgo+ID4+ICAgICAgICAgaW50IG9uX2J1aWxkX2ZyZWVfbmlkczsgICAgICAg ICAgICAgICAgIC8qIGJ1aWxkX2ZyZWVfbmlkcyBpcwo+ID4+IGRvaW5nICovCj4gPj4KPiA+PiBA QCAtNTMzLDE1ICs1MzQsMTkgQEAgc3RhdGljIGlubGluZSB2b2lkIG11dGV4X3VubG9ja19hbGwo c3RydWN0Cj4gPj4gZjJmc19zYl9pbmZvICpzYmkpCj4gPj4KPiA+Pgo+ID4+Cj4gPj4gIHN0YXRp YyBpbmxpbmUgaW50IG11dGV4X2xvY2tfb3Aoc3RydWN0IGYyZnNfc2JfaW5mbyAqc2JpKQo+ID4+ Cj4gPj4gIHsKPiA+Pgo+ID4+IC0gICAgICAgdW5zaWduZWQgY2hhciBuZXh0X2xvY2sgPSBzYmkt Pm5leHRfbG9ja19udW0gJQo+ID4+IE5SX0dMT0JBTF9MT0NLUzsKPiA+Pgo+ID4+ICsgICAgICAg dW5zaWduZWQgY2hhciBuZXh0X2xvY2s7Cj4gPj4KPiA+PiAgICAgICAgIGludCBpID0gMDsKPiA+ Pgo+ID4+Cj4gPj4KPiA+PiAgICAgICAgIGZvciAoOyBpIDwgTlJfR0xPQkFMX0xPQ0tTOyBpKysp Cj4gPj4KPiA+PiAgICAgICAgICAgICAgICAgaWYgKG11dGV4X3RyeWxvY2soJnNiaS0+ZnNfbG9j a1tpXSkpCj4gPj4KPiA+PiAgICAgICAgICAgICAgICAgICAgICAgICByZXR1cm4gaTsKPiA+Pgo+ ID4+Cj4gPj4KPiA+PiAtICAgICAgIG11dGV4X2xvY2soJnNiaS0+ZnNfbG9ja1tuZXh0X2xvY2td KTsKPiA+Pgo+ID4+ICsgICAgICAgc3Bpbl9sb2NrKCZzYmktPnNwaW5fbG9jayk7Cj4gPj4KPiA+ PiArICAgICAgIG5leHRfbG9jayA9IHNiaS0+bmV4dF9sb2NrX251bSAlIE5SX0dMT0JBTF9MT0NL UzsKPiA+Pgo+ID4+ICAgICAgICAgc2JpLT5uZXh0X2xvY2tfbnVtKys7Cj4gPj4KPiA+PiArICAg ICAgIHNwaW5fdW5sb2NrKCZzYmktPnNwaW5fbG9jayk7Cj4gPj4KPiA+PiArCj4gPj4KPiA+PiAr ICAgICAgIG11dGV4X2xvY2soJnNiaS0+ZnNfbG9ja1tuZXh0X2xvY2tdKTsKPiA+Pgo+ID4+ICAg ICAgICAgcmV0dXJuIG5leHRfbG9jazsKPiA+Pgo+ID4+ICB9Cj4gPj4KPiA+Pgo+ID4+Cj4gPj4g ZGlmZiAtLWdpdCBhL2ZzL2YyZnMvc3VwZXIuYyBiL2ZzL2YyZnMvc3VwZXIuYwo+ID4+Cj4gPj4g b2xkIG1vZGUgMTAwNjQ0Cj4gPj4KPiA+PiBuZXcgbW9kZSAxMDA3NTUKPiA+Pgo+ID4+IGluZGV4 IDc1YzdkYzMuLjRmMjc1OTYKPiA+Pgo+ID4+IC0tLSBhL2ZzL2YyZnMvc3VwZXIuYwo+ID4+Cj4g Pj4gKysrIGIvZnMvZjJmcy9zdXBlci5jCj4gPj4KPiA+PiBAQCAtNjU3LDYgKzY1Nyw3IEBAIHN0 YXRpYyBpbnQgZjJmc19maWxsX3N1cGVyKHN0cnVjdCBzdXBlcl9ibG9jawo+ID4+ICpzYiwgdm9p ZCAqZGF0YSwgaW50IHNpbGVudCkKPiA+Pgo+ID4+ICAgICAgICAgbXV0ZXhfaW5pdCgmc2JpLT5j cF9tdXRleCk7Cj4gPj4KPiA+PiAgICAgICAgIGZvciAoaSA9IDA7IGkgPCBOUl9HTE9CQUxfTE9D S1M7IGkrKykKPiA+Pgo+ID4+ICAgICAgICAgICAgICAgICBtdXRleF9pbml0KCZzYmktPmZzX2xv Y2tbaV0pOwo+ID4+Cj4gPj4gKyAgICAgICBzcGluX2xvY2tfaW5pdCgmc2JpLT5zcGluX2xvY2sp Owo+ID4+Cj4gPj4gICAgICAgICBtdXRleF9pbml0KCZzYmktPm5vZGVfd3JpdGUpOwo+ID4+Cj4g Pj4gICAgICAgICBzYmktPnBvcl9kb2luZyA9IDA7Cj4gPj4KPiA+PiAgICAgICAgIHNwaW5fbG9j a19pbml0KCZzYmktPnN0YXRfbG9jayk7Cj4gPj4KPiA+PiAoRU5EKQo+ID4+Cj4gPj4KPiA+Pgo+ ID4+Cj4gPj4KPiA+Pgo+ID4KPiAKPiAKPiA9CgoKLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tCkhvdyBT ZXJ2aWNlTm93IGhlbHBzIElUIHBlb3BsZSB0cmFuc2Zvcm0gSVQgZGVwYXJ0bWVudHM6CjEuIENv bnNvbGlkYXRlIGxlZ2FjeSBJVCBzeXN0ZW1zIHRvIGEgc2luZ2xlIHN5c3RlbSBvZiByZWNvcmQg Zm9yIElUCjIuIFN0YW5kYXJkaXplIGFuZCBnbG9iYWxpemUgc2VydmljZSBwcm9jZXNzZXMgYWNy b3NzIElUCjMuIEltcGxlbWVudCB6ZXJvLXRvdWNoIGF1dG9tYXRpb24gdG8gcmVwbGFjZSBtYW51 YWwsIHJlZHVuZGFudCB0YXNrcwpodHRwOi8vcHViYWRzLmcuZG91YmxlY2xpY2submV0L2dhbXBh ZC9jbGs/aWQ9NTEyNzExMTEmaXU9LzQxNDAvb3N0Zy5jbGt0cmsKX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX18KTGludXgtZjJmcy1kZXZlbCBtYWlsaW5nIGxp c3QKTGludXgtZjJmcy1kZXZlbEBsaXN0cy5zb3VyY2Vmb3JnZS5uZXQKaHR0cHM6Ly9saXN0cy5z b3VyY2Vmb3JnZS5uZXQvbGlzdHMvbGlzdGluZm8vbGludXgtZjJmcy1kZXZlbAo=