From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jaegeuk Kim Subject: Re: [PATCH V2 2/2 RESEND] f2fs: read contiguous sit entry pages by merging for mount performance Date: Thu, 21 Nov 2013 13:45:32 +0900 Message-ID: <1385009132.26319.71.camel@kjgkr> References: <001d01cee5bc$779c2fe0$66d48fa0$@samsung.com> <1384997517.26319.60.camel@kjgkr> <000001cee668$872ec6a0$958c53e0$@samsung.com> Reply-To: jaegeuk.kim@samsung.com Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net To: Chao Yu Return-path: In-reply-to: <000001cee668$872ec6a0$958c53e0$@samsung.com> 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 SGksCgoyMDEzLTExLTIxICjrqqkpLCAxMToxOCArMDgwMCwgQ2hhbyBZdToKPiBIaSwKPiAKPiA+ IC0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tCj4gPiBGcm9tOiBKYWVnZXVrIEtpbSBbbWFpbHRv OmphZWdldWsua2ltQHNhbXN1bmcuY29tXQo+ID4gU2VudDogVGh1cnNkYXksIE5vdmVtYmVyIDIx LCAyMDEzIDk6MzIgQU0KPiA+IFRvOiBDaGFvIFl1Cj4gPiBDYzogbGludXgtZnNkZXZlbEB2Z2Vy Lmtlcm5lbC5vcmc7IGxpbnV4LWtlcm5lbEB2Z2VyLmtlcm5lbC5vcmc7IGxpbnV4LWYyZnMtZGV2 ZWxAbGlzdHMuc291cmNlZm9yZ2UubmV0OyDosK3lp50KPiA+IFN1YmplY3Q6IFJlOiBbZjJmcy1k ZXZdIFtQQVRDSCBWMiAyLzIgUkVTRU5EXSBmMmZzOiByZWFkIGNvbnRpZ3VvdXMgc2l0IGVudHJ5 IHBhZ2VzIGJ5IG1lcmdpbmcgZm9yIG1vdW50IHBlcmZvcm1hbmNlCj4gPiAKPiA+IEhpLAo+ID4g Cj4gPiBJdCBzZWVtcyB0aGF0IHJhX3NpdF9wYWdlcygpIGlzIHRvbyB0aWdodGx5IGNvdXBsZWQg d2l0aAo+ID4gYnVpbGRfc2l0X2VudHJpZXMoKS4KPiAKPiBUaGlzIGNvZGUgY291bGQgYmUgaW1w cm92ZWQuCj4gCj4gPiBJcyB0aGVyZSBhbm90aGVyIHdheSBub3QgdG8gdXNlICppc19vcmRlcj8K PiAKPiBQcmV2aW91c2x5IHRoZSBjb2RlIGlzIGxpa2UgdGhpczoKPiAgLWJ1aWxkX3NpdF9lbnRy aWVzKCkKPiAgbmV4dF9zZXRwOgo+IAlmb3Ioc3RhcnQgPSAwOyBzdGFydCA8IFRPVEFMX1NFR1Mo c2JpKTsgc3RhcnQrKykKPiAJCS8qc3RlcCMxIHJlYWRhaGVhZCBhbGwgc2l0IGVudHJpZXMgYmxv Y2tzKi8KPiAJCQlpZihzdGFydCAlIFNJVF9FTlRSWV9QRVJfQkxPQ0sgPT0gMCkgewo+IAkJCQli bGtfYWRkciA9IGN1cnJlbnRfc2l0X2FkZHIoc2JpLCBzdGFydCk7Cj4gCQkJCS8qIGdyYWIgYW5k IHN1Ym1pdF9yZWFkX3BhZ2UgKi8KPiAJCQl9Cj4gCQkJaWYoc3RhcnQgPT0gVE9UQUxfU0VHUyhz YmkpIC0gMSkKPiAJCQkJZjJmc19zdWJtaXRfcmVhZF9iaW8oKTsKPiAJCQljb250aW51ZTsKPiAJ CS8qc3RlcCMyIGZpbGwgc2l0IGVudHJpZXMgaW5mbyovCj4gCQkvKnN0ZXAjMyBjb3ZlciBzaXQg ZW50cmllcyB3aXRoIGpvdXJuYWwqLwo+IAo+IEJ1dCBJIHRoaW5rIGl0cyB3ZWFrbmVzcyBpcyB0 aGF0IGl0IHdpbGwgY29zdCBsb3RzIG9mIG1lbW9yeSB0byByZWFkIAo+IGFoZWFkIGFsbCBzaXQg ZW50cnkgcGFnZXMgd2hlbiBmMmZzIG1vdW50LCBhbmQgYWxzbyBpdCdzIHNlcmlvdXMgd2FzdGUg Cj4gdGhhdCB3ZSByZWFkIHRoZW0gYWdhaW4gYWZ0ZXIgdGhlc2UgcGFnZXMgYXJlIHJlbGVhc2Vk IGJ5IFZNIHdoZW4gCj4gb3V0IG9mIG1lbW9yeS4KPiAKPiA+IAo+ID4gVGhlIHJhX3NpdF9wYWdl cygpIHRyaWVzIHRvIHJlYWQgY29uc2VjdXRpdmUgc2l0IHBhZ2VzIGFzIG1hbnkgYXMKPiA+IHBv c3NpYmxlLgo+ID4gU28gdGhlbiwgd2hhdCBhYm91dCBqdXN0IGNoZWNraW5nIHdoZXRoZXIgaXRz IGJsb2NrIGFkZHJlc3MgaXMKPiA+IGNvbnRpZ3VvdXMgb3Igbm90Pwo+ID4gCj4gPiBTb21ldGhp bmcgbGlrZSB0aGlzOgo+ID4gIC1yYV9zaXRfcGFnZXMoKQo+ID4gCWJsa25vID0gc3RhcnQ7Cj4g PiAJd2hpbGUgKGJsa25vIDwgc2l0X2ktPnNpdF9ibG9ja3MpIHsKPiA+IAkJYmxrX2FkZHIgPSBj dXJyZW50X3NpdF9hZGRyKHNiaSwgYmxrbm8pOwo+ID4gCQlpZiAoYmxrbm8gIT0gc3RhcnQgJiYg cHJldl9ibGtfYWRkciArIDEgIT0gYmxrX2FkZHIpCj4gPiAJCQlicmVhazsKPiA+IAo+ID4gCQkv KiBncmFiIGFuZCBzdWJtaXRfcmVhZF9wYWdlICovCj4gPiAKPiA+IAkJcHJldl9ibGtfYWRkciA9 IGJsa19hZGRyOwo+ID4gCQlibGtubysrOwo+ID4gCX0KPiAKPiBBZ3JlZWQsIHRoaXMgbWV0aG9k IGNvdWxkIHJlbW92ZSAqb3JkZXIuCj4gU2hvdWxkbid0IHdlIGFkZCBucnBhZ2VzIGZvciByZWFk YWhlYWQgcG9saWN5IGFzIFZNPwoKQWhhLCBhZ3JlZWQuCldlIG5lZWQgbnJwYWdlcyB0byBhdm9p ZCB0b28gbWFueSByZWFkcyBvbiBzaXQgYmxvY2tzLgoKQnV0LCBzdGlsbCBpdCBuZWVkcyB0byBj aGFuZ2UgdGhlIG5ycGFnZXMgaW4gaXRzIGNhbGxlci4KSW4geW91ciBwYXRjaCwgaXQgd2FzIHNp dF9pLT5zaXRfYmxvY2tzIHRoYXQgaXMgdG90YWwgIyBvZiBzaXQgYmxvY2tzLgpJIHRoaW5rIDEy OCBvciAyNTYgaXMgcXVpdGUgcmVhc29uYWJsZSBudW1iZXIuCgpBbnl3YXksIGhvdyBhYm91dCBp bXBsZW1lbnRpbmcgcmFfc2l0X3BhZ2VzKCkgd2l0aCBhIGJsa19wbHVnIGxpa2V3aXNlCnJhX25v ZGVfcGFnZXMoKT8KCi0tIApKYWVnZXVrIEtpbQpTYW1zdW5nCgoKCi0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLQpTaGFwZSB0aGUgTW9iaWxlIEV4cGVyaWVuY2U6IEZyZWUgU3Vic2NyaXB0aW9uClNvZnR3 YXJlIGV4cGVydHMgYW5kIGRldmVsb3BlcnM6IEJlIGF0IHRoZSBmb3JlZnJvbnQgb2YgdGVjaCBp bm5vdmF0aW9uLgpJbnRlbChSKSBTb2Z0d2FyZSBBZHJlbmFsaW5lIGRlbGl2ZXJzIHN0cmF0ZWdp YyBpbnNpZ2h0IGFuZCBnYW1lLWNoYW5naW5nIApjb252ZXJzYXRpb25zIHRoYXQgc2hhcGUgdGhl IHJhcGlkbHkgZXZvbHZpbmcgbW9iaWxlIGxhbmRzY2FwZS4gU2lnbiB1cCBub3cuIApodHRwOi8v cHViYWRzLmcuZG91YmxlY2xpY2submV0L2dhbXBhZC9jbGs/aWQ9NjM0MzEzMTEmaXU9LzQxNDAv b3N0Zy5jbGt0cmsKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X18KTGludXgtZjJmcy1kZXZlbCBtYWlsaW5nIGxpc3QKTGludXgtZjJmcy1kZXZlbEBsaXN0cy5z b3VyY2Vmb3JnZS5uZXQKaHR0cHM6Ly9saXN0cy5zb3VyY2Vmb3JnZS5uZXQvbGlzdHMvbGlzdGlu Zm8vbGludXgtZjJmcy1kZXZlbAo=