From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chao Yu Subject: Re: [PATCH] f2fs: limit nr_iovecs in bio_alloc Date: Fri, 13 Sep 2013 20:10:37 +0800 Message-ID: <000201ceb07a$60980fc0$21c82f40$@samsung.com> References: <000001ceb069$318a87a0$949f96e0$@samsung.com> <5232FBC0.2030509@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 Return-path: Received: from sog-mx-4.v43.ch3.sourceforge.com ([172.29.43.194] helo=mx.sourceforge.net) by sfs-ml-3.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1VKSDq-0003F0-Qw for linux-f2fs-devel@lists.sourceforge.net; Fri, 13 Sep 2013 12:11:38 +0000 Received: from mailout4.samsung.com ([203.254.224.34]) by sog-mx-4.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1VKSDo-0008Od-K0 for linux-f2fs-devel@lists.sourceforge.net; Fri, 13 Sep 2013 12:11:38 +0000 Received: from epcpsbgm2.samsung.com (epcpsbgm2 [203.254.230.27]) by mailout4.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0MT2009KPCJ5X3R0@mailout4.samsung.com> for linux-f2fs-devel@lists.sourceforge.net; Fri, 13 Sep 2013 21:11:29 +0900 (KST) In-reply-to: <5232FBC0.2030509@gmail.com> Content-language: zh-cn List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net To: 'Jin Xu' Cc: linux-fsdevel@vger.kernel.org, =?gb2312?B?J8y35q0n?= , linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net PiAtLS0tLU9yaWdpbmFsIE1lc3NhZ2UtLS0tLQo+IEZyb206IEppbiBYdSBbbWFpbHRvOmxpbnV4 Y2xpbWJlckBnbWFpbC5jb21dCj4gU2VudDogRnJpZGF5LCBTZXB0ZW1iZXIgMTMsIDIwMTMgNzo0 OSBQTQo+IFRvOiBDaGFvIFl1Cj4gQ2M6ID8/PzsgbGludXgtZjJmcy1kZXZlbEBsaXN0cy5zb3Vy Y2Vmb3JnZS5uZXQ7CmxpbnV4LWZzZGV2ZWxAdmdlci5rZXJuZWwub3JnOwo+IGxpbnV4LWtlcm5l bEB2Z2VyLmtlcm5lbC5vcmc7IMy35q0KPiBTdWJqZWN0OiBSZTogW2YyZnMtZGV2XVtQQVRDSF0g ZjJmczogbGltaXQgbnJfaW92ZWNzIGluIGJpb19hbGxvYwo+IAo+IERpZCB0aGlzIHBhdGNoIHBh c3MgdGhlIGJhc2ljIGJ1aWxkPyBUaGVyZSBzZWVtcyBoYXZlIGEgdHlwbyByZWdhcmRpbmcKPiBN QVhfQklPX0JMT0NLLgo+IAoKSSBhbSBzbyBzb3JyeSBhYm91dCB0aGF0LkkgbWlzcyB0aGUgJ1Mn IHdoZW4gbWVyZ2luZyB0aGUgY29kZSBieSBoYW5kd3JpdGluZwpmcm9tIGJ1aWxkIHBhdGggdG8g Z2l0IGJyYW5jaCBwYXRoLgpJIHdpbGwgY2hlY2sgdGhlIHBhdGNoIGNhcmVmdWxseSBhbmQgcmVz dWJtaXQgaXQuCgpUaGFua3MgZm9yIHJlbWluZGluZyEKCj4gLS0KPiBKaW4KPiAKPiBPbiAxMy8w OS8yMDEzIDE4OjA3LCBDaGFvIFl1IHdyb3RlOgo+ID4gVGhpcyBwYXRjaCBhZGQgbWFjcm8gTUFY X0JJT19CTE9DS1MgdG8gbGltaXQgdmFsdWUgb2YgbnBhZ2VzIGluCj4gPiBmMmZzX2Jpb19hbGxv YywgaXQgY2FuIGF2b2lkIHRvIHJldHVybiBOVUxMIGluIGJpb19hbGxvYyBjYXVzZWQgYnkKPiA+ IG5wYWdlcyBpcyBsYXJnZXIgdGhhbiBVSU9fTUFYSU9WLgo+ID4KPiA+IFNpZ25lZC1vZmYtYnk6 IFl1IENoYW8gPGNoYW8yLnl1QHNhbXN1bmcuY29tPgo+ID4gIC0tLQo+ID4gIGZzL2YyZnMvc2Vn bWVudC5jIHwgICAgNCArKystCj4gPiAgZnMvZjJmcy9zZWdtZW50LmggfCAgICAzICsrKwo+ID4g IDIgZmlsZXMgY2hhbmdlZCwgNiBpbnNlcnRpb25zKCspLCAxIGRlbGV0aW9uKC0pCj4gPgo+ID4g ZGlmZiAtLWdpdCBhL2ZzL2YyZnMvc2VnbWVudC5jIGIvZnMvZjJmcy9zZWdtZW50LmMgaW5kZXgK PiA+IDA5YWY5YzcuLmJkNzliYmUgMTAwNjQ0Cj4gPiAtLS0gYS9mcy9mMmZzL3NlZ21lbnQuYwo+ ID4gKysrIGIvZnMvZjJmcy9zZWdtZW50LmMKPiA+IEBAIC02NTcsNiArNjU3LDcgQEAgc3RhdGlj IHZvaWQgc3VibWl0X3dyaXRlX3BhZ2Uoc3RydWN0IGYyZnNfc2JfaW5mbwo+ID4gKnNiaSwgc3Ry dWN0IHBhZ2UgKnBhZ2UsCj4gPiAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIGJsb2Nr X3QgYmxrX2FkZHIsIGVudW0gcGFnZV90eXBlCj4gdHlwZSkKPiA+IHsKPiA+ICAgICAgICAgc3Ry dWN0IGJsb2NrX2RldmljZSAqYmRldiA9IHNiaS0+c2ItPnNfYmRldjsKPiA+ICsgICAgICAgaW50 IGJpb19ibG9ja3M7Cj4gPgo+ID4gICAgICAgICB2ZXJpZnlfYmxvY2tfYWRkcihzYmksIGJsa19h ZGRyKTsKPiA+Cj4gPiBAQCAtNjc2LDcgKzY3Nyw4IEBAIHJldHJ5Ogo+ID4gICAgICAgICAgICAg ICAgICAgICAgICAgZ290byByZXRyeTsKPiA+ICAgICAgICAgICAgICAgICB9Cj4gPgo+ID4gLSAg ICAgICAgICAgICAgIHNiaS0+YmlvW3R5cGVdID0gZjJmc19iaW9fYWxsb2MoYmRldiwKbWF4X2h3 X2Jsb2NrcyhzYmkpKTsKPiA+ICsgICAgICAgICAgICAgICBiaW9fYmxvY2tzID0gTUFYX0JJT19C TE9DS1MobWF4X2h3X2Jsb2NrcyhzYmkpKTsKPiA+ICsgICAgICAgICAgICAgICBzYmktPmJpb1t0 eXBlXSA9IGYyZnNfYmlvX2FsbG9jKGJkZXYsIGJpb19ibG9ja3MpOwo+ID4gICAgICAgICAgICAg ICAgIHNiaS0+YmlvW3R5cGVdLT5iaV9zZWN0b3IgPSBTRUNUT1JfRlJPTV9CTE9DSyhzYmksCj4g PiBibGtfYWRkcik7Cj4gPiAgICAgICAgICAgICAgICAgc2JpLT5iaW9bdHlwZV0tPmJpX3ByaXZh dGUgPSBwcml2Owo+ID4gICAgICAgICAgICAgICAgIC8qCj4gPiBkaWZmIC0tZ2l0IGEvZnMvZjJm cy9zZWdtZW50LmggYi9mcy9mMmZzL3NlZ21lbnQuaCBpbmRleAo+ID4gYmRkMTBlYS4uOWNjOTVl YiAxMDA2NDQKPiA+IC0tLSBhL2ZzL2YyZnMvc2VnbWVudC5oCj4gPiArKysgYi9mcy9mMmZzL3Nl Z21lbnQuaAo+ID4gQEAgLTksNiArOSw3IEBACj4gPiAgICogcHVibGlzaGVkIGJ5IHRoZSBGcmVl IFNvZnR3YXJlIEZvdW5kYXRpb24uCj4gPiAgICovCj4gPiAgI2luY2x1ZGUgPGxpbnV4L2Jsa2Rl di5oPgo+ID4gKyNpbmNsdWRlIDxsaW51eC91aW8uaD4KPiA+Cj4gPiAgLyogY29uc3RhbnQgbWFj cm8gKi8KPiA+ICAjZGVmaW5lIE5VTExfU0VHTk8gICAgICAgICAgICAgICAgICAgICAoKHVuc2ln bmVkIGludCkofjApKQo+ID4gQEAgLTkwLDYgKzkxLDggQEAKPiA+ICAgICAgICAgKGJsa19hZGRy IDw8ICgoc2JpKS0+bG9nX2Jsb2Nrc2l6ZSAtIEYyRlNfTE9HX1NFQ1RPUl9TSVpFKSkKPiA+ICAj ZGVmaW5lIFNFQ1RPUl9UT19CTE9DSyhzYmksIHNlY3RvcnMpCj4gXAo+ID4gICAgICAgICAoc2Vj dG9ycyA+PiAoKHNiaSktPmxvZ19ibG9ja3NpemUgLSBGMkZTX0xPR19TRUNUT1JfU0laRSkpCj4g PiArI2RlZmluZSBNQVhfQklPX0JMT0NLKG1heF9od19ibG9ja3MpCj4gXAo+ID4gKyAgICAgICAo bWluKChpbnQpbWF4X2h3X2Jsb2NrcywgVUlPX01BWElPVikpCj4gPgo+ID4gIC8qIGR1cmluZyBj aGVja3BvaW50LCBiaW9fcHJpdmF0ZSBpcyB1c2VkIHRvIHN5bmNocm9uaXplIHRoZSBsYXN0IGJp bwo+ID4gKi8gIHN0cnVjdCBiaW9fcHJpdmF0ZSB7Cj4gPiAtLS0KPiA+Cj4gPiAtLQo+ID4gVG8g dW5zdWJzY3JpYmUgZnJvbSB0aGlzIGxpc3Q6IHNlbmQgdGhlIGxpbmUgInVuc3Vic2NyaWJlCj4g PiBsaW51eC1rZXJuZWwiIGluIHRoZSBib2R5IG9mIGEgbWVzc2FnZSB0byBtYWpvcmRvbW9Admdl ci5rZXJuZWwub3JnCj4gPiBNb3JlIG1ham9yZG9tbyBpbmZvIGF0ICBodHRwOi8vdmdlci5rZXJu ZWwub3JnL21ham9yZG9tby1pbmZvLmh0bWwKPiA+IFBsZWFzZSByZWFkIHRoZSBGQVEgYXQgIGh0 dHA6Ly93d3cudHV4Lm9yZy9sa21sLwoKCi0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLQpIb3cgU2Vydmlj ZU5vdyBoZWxwcyBJVCBwZW9wbGUgdHJhbnNmb3JtIElUIGRlcGFydG1lbnRzOgoxLiBDb25zb2xp ZGF0ZSBsZWdhY3kgSVQgc3lzdGVtcyB0byBhIHNpbmdsZSBzeXN0ZW0gb2YgcmVjb3JkIGZvciBJ VAoyLiBTdGFuZGFyZGl6ZSBhbmQgZ2xvYmFsaXplIHNlcnZpY2UgcHJvY2Vzc2VzIGFjcm9zcyBJ VAozLiBJbXBsZW1lbnQgemVyby10b3VjaCBhdXRvbWF0aW9uIHRvIHJlcGxhY2UgbWFudWFsLCBy ZWR1bmRhbnQgdGFza3MKaHR0cDovL3B1YmFkcy5nLmRvdWJsZWNsaWNrLm5ldC9nYW1wYWQvY2xr P2lkPTUxMjcxMTExJml1PS80MTQwL29zdGcuY2xrdHJrCl9fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fCkxpbnV4LWYyZnMtZGV2ZWwgbWFpbGluZyBsaXN0Ckxp bnV4LWYyZnMtZGV2ZWxAbGlzdHMuc291cmNlZm9yZ2UubmV0Cmh0dHBzOi8vbGlzdHMuc291cmNl Zm9yZ2UubmV0L2xpc3RzL2xpc3RpbmZvL2xpbnV4LWYyZnMtZGV2ZWwK