From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jaegeuk Kim Subject: Re: [PATCH] f2fs: check all ones or zeros bitmap with integer data type for better mount performance Date: Tue, 22 Oct 2013 21:23:32 +0900 Message-ID: <1382444612.992.67.camel@kjgkr> References: <000701cecf09$2b2a2280$817e6780$@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, =?UTF-8?Q?=E8=B0=AD=E5=A7=9D?= , linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net To: Chao Yu Return-path: In-reply-to: <000701cecf09$2b2a2280$817e6780$@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 SGksCgoyMDEzLTEwLTIyICjtmZQpLCAxNzoyOCArMDgwMCwgQ2hhbyBZdToKPiBQcmV2aW91c2x5 LCBjaGVja19ibG9ja19jb3VudCBjaGVjayB2YWxpZF9tYXAgd2l0aCBiaXQgZGF0YSB0eXBlIGlu IGNvbW1vbgo+IHNjZW5hcmlvIHRoYXQgc2l0IGhhcyBhbGwgb25lcyBvciB6ZXJvcyBiaXRtYXAs IGl0IG1ha2VzIGxvdyBtb3VudAo+IHBlcmZvcm1hbmNlLgo+IFNvIGxldCdzIGNoZWNrIHRoZSBz cGVjaWFsIGJpdG1hcCB3aXRoIGludGVnZXIgZGF0YSB0eXBlIGluc3RlYWQgb2YgdGhlIGJpdAo+ IG9uZS4KPiAKPiBTaWduZWQtb2ZmLWJ5OiBUYW4gU2h1IDxzaHUudGFuQHNhbXN1bmcuY29tPgo+ IFNpZ25lZC1vZmYtYnk6IFl1IENoYW8gPGNoYW8yLnl1QHNhbXN1bmcuY29tPgo+IC0tLQo+ICBm cy9mMmZzL3NlZ21lbnQuaCB8ICAgMTMgKysrKysrKysrKysrKwo+ICAxIGZpbGUgY2hhbmdlZCwg MTMgaW5zZXJ0aW9ucygrKQo+IAo+IGRpZmYgLS1naXQgYS9mcy9mMmZzL3NlZ21lbnQuaCBiL2Zz L2YyZnMvc2VnbWVudC5oCj4gaW5kZXggN2Y5NGQ3OC4uZDQzYWI5ZiAxMDA2NDQKPiAtLS0gYS9m cy9mMmZzL3NlZ21lbnQuaAo+ICsrKyBiL2ZzL2YyZnMvc2VnbWVudC5oCj4gQEAgLTU0Myw2ICs1 NDMsNyBAQCBzdGF0aWMgaW5saW5lIHZvaWQgY2hlY2tfYmxvY2tfY291bnQoc3RydWN0IGYyZnNf c2JfaW5mbwo+ICpzYmksCj4gIHsKPiAgCXN0cnVjdCBmMmZzX3NtX2luZm8gKnNtX2luZm8gPSBT TV9JKHNiaSk7Cj4gIAl1bnNpZ25lZCBpbnQgZW5kX3NlZ25vID0gc21faW5mby0+c2VnbWVudF9j b3VudCAtIDE7Cj4gKwlpbnQgKnZhbGlkX21hcCA9IChpbnQgKilyYXdfc2l0LT52YWxpZF9tYXA7 Cj4gIAlpbnQgdmFsaWRfYmxvY2tzID0gMDsKPiAgCWludCBpOwo+ICAKPiBAQCAtNTUyLDYgKzU1 MywxOSBAQCBzdGF0aWMgaW5saW5lIHZvaWQgY2hlY2tfYmxvY2tfY291bnQoc3RydWN0Cj4gZjJm c19zYl9pbmZvICpzYmksCj4gIAkvKiBjaGVjayBib3VuZGFyeSBvZiBhIGdpdmVuIHNlZ21lbnQg bnVtYmVyICovCj4gIAlCVUdfT04oc2Vnbm8gPiBlbmRfc2Vnbm8pOwo+ICAKPiArCS8qIGNoZWNr IGFsbCBvbmVzIG9yIHplcm9zIHZhbGlkX21hcCAqLwo+ICsJaWYgKEdFVF9TSVRfVkJMT0NLUyhy YXdfc2l0KSA9PSAwKSB7Cj4gKwkJZm9yIChpID0gMDsgaSA8IFNJVF9WQkxPQ0tfTUFQX1NJWkUg LyBzaXplb2YoaW50KTsgaSsrKQoKV2UgY2Fubm90IGd1YXJhbnRlZSBhbGwgdGhlIHRpbWUgdGhh dCBTSVRfVkJMT0NLX01BUF9TSVpFIGlzIG11bHRpcGxlIG9mCnNpemVvZihpbnQpLgpIb3cgYWJv dXQgdXNpbmcgbWVtY21wKCkgd2l0aCBfX3U4PwoKPiArCQkJaWYgKHVubGlrZWx5KHZhbGlkX21h cFtpXSAhPSAwKSkKPiArCQkJCUJVRygpOwo+ICsJCXJldHVybjsKPiArCX0gZWxzZSBpZiAoR0VU X1NJVF9WQkxPQ0tTKHJhd19zaXQpID09IHNiaS0+YmxvY2tzX3Blcl9zZWcpIHsKPiArCQlmb3Ig KGkgPSAwOyBpIDwgU0lUX1ZCTE9DS19NQVBfU0laRSAvIHNpemVvZihpbnQpOyBpKyspCj4gKwkJ CWlmICh1bmxpa2VseSh2YWxpZF9tYXBbaV0gIT0gLTEpKQo+ICsJCQkJQlVHKCk7Cj4gKwkJcmV0 dXJuOwo+ICsJfQo+ICsKPiAgCS8qIGNoZWNrIGJpdG1hcCB3aXRoIHZhbGlkIGJsb2NrIGNvdW50 ICovCj4gIAlmb3IgKGkgPSAwOyBpIDwgc2JpLT5ibG9ja3NfcGVyX3NlZzsgaSsrKQo+ICAJCWlm IChmMmZzX3Rlc3RfYml0KGksIHJhd19zaXQtPnZhbGlkX21hcCkpCj4gLS0tCj4gCj4gLS0KPiBU byB1bnN1YnNjcmliZSBmcm9tIHRoaXMgbGlzdDogc2VuZCB0aGUgbGluZSAidW5zdWJzY3JpYmUg bGludXgtZnNkZXZlbCIgaW4KPiB0aGUgYm9keSBvZiBhIG1lc3NhZ2UgdG8gbWFqb3Jkb21vQHZn ZXIua2VybmVsLm9yZwo+IE1vcmUgbWFqb3Jkb21vIGluZm8gYXQgIGh0dHA6Ly92Z2VyLmtlcm5l bC5vcmcvbWFqb3Jkb21vLWluZm8uaHRtbAoKLS0gCkphZWdldWsgS2ltClNhbXN1bmcKCgotLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0KT2N0b2JlciBXZWJpbmFyczogQ29kZSBmb3IgUGVyZm9ybWFuY2UK RnJlZSBJbnRlbCB3ZWJpbmFycyBjYW4gaGVscCB5b3UgYWNjZWxlcmF0ZSBhcHBsaWNhdGlvbiBw ZXJmb3JtYW5jZS4KRXhwbG9yZSB0aXBzIGZvciBNUEksIE9wZW5NUCwgYWR2YW5jZWQgcHJvZmls aW5nLCBhbmQgbW9yZS4gR2V0IHRoZSBtb3N0IGZyb20gCnRoZSBsYXRlc3QgSW50ZWwgcHJvY2Vz c29ycyBhbmQgY29wcm9jZXNzb3JzLiBTZWUgYWJzdHJhY3RzIGFuZCByZWdpc3RlciA+Cmh0dHA6 Ly9wdWJhZHMuZy5kb3VibGVjbGljay5uZXQvZ2FtcGFkL2Nsaz9pZD02MDEzNTk5MSZpdT0vNDE0 MC9vc3RnLmNsa3RyawpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fXwpMaW51eC1mMmZzLWRldmVsIG1haWxpbmcgbGlzdApMaW51eC1mMmZzLWRldmVsQGxpc3Rz LnNvdXJjZWZvcmdlLm5ldApodHRwczovL2xpc3RzLnNvdXJjZWZvcmdlLm5ldC9saXN0cy9saXN0 aW5mby9saW51eC1mMmZzLWRldmVsCg==