From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 512D2C4332F for ; Tue, 7 Nov 2023 03:49:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Bw++3rp9yS1QYqVzROQ8AjIcpH5atvcCjfSjmIBnrik=; b=JS4wsdjBXXPiqy 3sLfqdl86ZR7HYKiQZHSTpb0bbbUTmDhwgYHoGMR5I3KxOUpzr9n5RQSxVDHvAb9p8qtk9m3QV7C4 t93oR7aQo1hX/f5MOfcsyhJNdoyRveRDbpnIhNfJ77b91Pu1MTQSKQy196hHrewL9HBtAxvOzw38Y k33Xacco4/TFSk3Ieck84yV71rBe2+0sftsCewnI1AktVdWy5wzeOiaIBl/QzRwQOv7nPC7Hp15CF rYXJfaAjQa6fpNFQq8616YEUTyCkY5ib4dIL9U2qAki3J1tHngXEAAw1O6NvLr0uPd/yvXVa0QGcx 3feajcpQN6Vzt574jEQA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1r0D5e-000SA7-19; Tue, 07 Nov 2023 03:49:22 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1r0D5c-000S8y-0Y for linux-arm-kernel@lists.infradead.org; Tue, 07 Nov 2023 03:49:21 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1699328959; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Y9FCMlk2IkrIEzQB8L9xTTGDJXhqSvTWTL0IDXr95cA=; b=gsDj7asPHqmJGXdY8x13q725pxOG0XZSwrwsdtpN7WYIAilC5HEnW1/xkPVBaIbk9MZpWn DoKBaB/cucwVj2HGAZVIDACtpzDax5KVY9+0KUDEGOexnp7d41RdCvBUUmrzD9Vh0JlNgh 0MedcRvsQP8OJT/o3tjLv1DBthxU9Yw= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-112-H3pkEELXNwqDhxmZ4mCm1w-1; Mon, 06 Nov 2023 22:48:58 -0500 X-MC-Unique: H3pkEELXNwqDhxmZ4mCm1w-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B7C1F185A781; Tue, 7 Nov 2023 03:48:57 +0000 (UTC) Received: from fedora (unknown [10.72.120.4]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 18CD240C6EB9; Tue, 7 Nov 2023 03:48:48 +0000 (UTC) Date: Tue, 7 Nov 2023 11:48:44 +0800 From: Ming Lei To: Ed Tsai =?utf-8?B?KOiUoeWul+i7kik=?= Cc: Will Shiu =?utf-8?B?KOioseaBreeRnCk=?= , "linux-kernel@vger.kernel.org" , "linux-mediatek@lists.infradead.org" , Peter Wang =?utf-8?B?KOeOi+S/oeWPiyk=?= , Alice Chao =?utf-8?B?KOi2meePruWdhyk=?= , "linux-block@vger.kernel.org" , wsd_upstream , "axboe@kernel.dk" , Casper Li =?utf-8?B?KOadjuS4reamrik=?= , Chun-Hung Wu =?utf-8?B?KOW3q+mnv+Wujyk=?= , Powen Kao =?utf-8?B?KOmrmOS8r+aWhyk=?= , Naomi Chu =?utf-8?B?KOacseipoOeUsCk=?= , "linux-arm-kernel@lists.infradead.org" , Stanley Chu =?utf-8?B?KOacseWOn+mZnik=?= , "matthias.bgg@gmail.com" , "angelogioacchino.delregno@collabora.com" , ming.lei@redhat.com Subject: Re: [PATCH 1/1] block: Check the queue limit before bio submitting Message-ID: References: <20231025092255.27930-1-ed.tsai@mediatek.com> <64db8f5406571c2f89b70f852eb411320201abe6.camel@mediatek.com> <2bc847a83849973b7658145f2efdda86cc47e3d5.camel@mediatek.com> <5ecedad658bf28abf9bbeeb70dcac09b4b404cf5.camel@mediatek.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.2 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231106_194920_301341_40AD6752 X-CRM114-Status: GOOD ( 47.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gVHVlLCBOb3YgMDcsIDIwMjMgYXQgMDI6NTM6MjBBTSArMDAwMCwgRWQgVHNhaSAo6JSh5a6X 6LuSKSB3cm90ZToKPiBPbiBNb24sIDIwMjMtMTEtMDYgYXQgMTk6NTQgKzA4MDAsIE1pbmcgTGVp IHdyb3RlOgo+ID4gIE9uIE1vbiwgTm92IDA2LCAyMDIzIGF0IDEyOjUzOjMxUE0gKzA4MDAsIE1p bmcgTGVpIHdyb3RlOgo+ID4gPiBPbiBNb24sIE5vdiAwNiwgMjAyMyBhdCAwMTo0MDoxMkFNICsw MDAwLCBFZCBUc2FpICjolKHlrpfou5IpIHdyb3RlOgo+ID4gPiA+IE9uIE1vbiwgMjAyMy0xMS0w NiBhdCAwOTozMyArMDgwMCwgRWQgVHNhaSB3cm90ZToKPiA+ID4gPiA+IE9uIFNhdCwgMjAyMy0x MS0wNCBhdCAxMTo0MyArMDgwMCwgTWluZyBMZWkgd3JvdGU6Cj4gPiA+IAo+ID4gPiAuLi4KPiA+ ID4gCj4gPiA+ID4gU29ycnkgZm9yIG1pc3Npbmcgb3V0IG9uIG15IGRkIGNvbW1hbmQuIEhlcmUg aXQgaXM6Cj4gPiA+ID4gZGQgaWY9L2RhdGEvdGVzdF9maWxlIG9mPS9kZXYvbnVsbCBicz02NG0g Y291bnQ9MSBpZmxhZz1kaXJlY3QKPiA+ID4gCj4gPiA+IE9LLCB0aGFua3MgZm9yIHRoZSBzaGFy aW5nLgo+ID4gPiAKPiA+ID4gSSB1bmRlcnN0YW5kIHRoZSBpc3N1ZSBub3csIGJ1dCBub3Qgc3Vy ZSBpZiBpdCBpcyBvbmUgZ29vZCBpZGVhIHRvCj4gPiBjaGVjawo+ID4gPiBxdWV1ZSBsaW1pdCBp biBfX2Jpb19pb3ZfaXRlcl9nZXRfcGFnZXMoKToKPiA+ID4gCj4gPiA+IDEpIGJpby0+YmlfYmRl diBtYXkgbm90IGJlIHNldAo+ID4gPiAKPiA+ID4gMikgd2hhdCBtYXR0ZXJzIGlzIGFjdHVhbGx5 IGJpbydzIGFsaWdubWVudCwgYW5kIGJpbyBzaXplIHN0aWxsIGNhbgo+ID4gPiBiZSBiaWcgZW5v dWdoCj4gPiA+IAo+ID4gPiBTbyBJIGNvb2tlZCBvbmUgcGF0Y2gsIGFuZCBpdCBzaG91bGQgYWRk cmVzcyB5b3VyIGlzc3VlOgo+ID4gCj4gPiBUaGUgZm9sbG93aW5nIG9uZSBmaXhlcyBzZXZlcmFs IGJ1Z3MsIGFuZCBpcyB2ZXJpZmllZCB0byBiZSBjYXBhYmxlCj4gPiBvZgo+ID4gbWFraW5nIGJp ZyAmIGFsaWduZWQgYmlvcywgZmVlbCBmcmVlIHRvIHJ1biB5b3VyIHRlc3QgYWdhaW5zdCB0aGlz Cj4gPiBvbmU6Cj4gPiAKPiA+ICBibG9jay9iaW8uYyB8IDI4ICsrKysrKysrKysrKysrKysrKysr KysrKysrKy0KPiA+ICAxIGZpbGUgY2hhbmdlZCwgMjcgaW5zZXJ0aW9ucygrKSwgMSBkZWxldGlv bigtKQo+ID4gCj4gPiBkaWZmIC0tZ2l0IGEvYmxvY2svYmlvLmMgYi9ibG9jay9iaW8uYwo+ID4g aW5kZXggODE2ZDQxMmMwNmU5Li44MGIzNmNlNTc1MTAgMTAwNjQ0Cj4gPiAtLS0gYS9ibG9jay9i aW8uYwo+ID4gKysrIGIvYmxvY2svYmlvLmMKPiA+IEBAIC0xMjExLDYgKzEyMTEsNyBAQCBzdGF0 aWMgaW50IGJpb19pb3ZfYWRkX3pvbmVfYXBwZW5kX3BhZ2Uoc3RydWN0Cj4gPiBiaW8gKmJpbywg c3RydWN0IHBhZ2UgKnBhZ2UsCj4gPiAgfQo+ID4gIAo+ID4gICNkZWZpbmUgUEFHRV9QVFJTX1BF Ul9CVkVDICAgICAoc2l6ZW9mKHN0cnVjdCBiaW9fdmVjKSAvCj4gPiBzaXplb2Yoc3RydWN0IHBh Z2UgKikpCj4gPiArI2RlZmluZSBCSU9fQ0hVTktfU0laRSgyNTZVIDw8IDEwKQo+ID4gIAo+ID4g IC8qKgo+ID4gICAqIF9fYmlvX2lvdl9pdGVyX2dldF9wYWdlcyAtIHBpbiB1c2VyIG9yIGtlcm5l bCBwYWdlcyBhbmQgYWRkIHRoZW0KPiA+IHRvIGEgYmlvCj4gPiBAQCAtMTI2Niw2ICsxMjY3LDMx IEBAIHN0YXRpYyBpbnQgX19iaW9faW92X2l0ZXJfZ2V0X3BhZ2VzKHN0cnVjdCBiaW8KPiA+ICpi aW8sIHN0cnVjdCBpb3ZfaXRlciAqaXRlcikKPiA+ICBzaXplIC09IHRyaW07Cj4gPiAgfQo+ID4g IAo+ID4gKy8qCj4gPiArICogVHJ5IHRvIG1ha2UgYmlvIGFsaWduZWQgd2l0aCAxMjhLQiBpZiBp dCBpc24ndCB0aGUgbGFzdCBvbmUsIHNvCj4gPiArICogd2UgY2FuIGF2b2lkIHNtYWxsIGJpbyBp biBjYXNlIG9mIGJpZyBjaHVuayBzZXF1ZW50aWFsIElPIGJlY2F1c2UKPiA+ICsgKiBvZiBiaW8g c3BsaXQgYW5kIG11bHRpcGFnZSBidmVjLgo+ID4gKyAqCj4gPiArICogSWYgbm90aGluZyBpcyBh ZGRlZCB0byB0aGlzIGJpbywgc2ltcGx5IGFsbG93IHVuYWxpZ25lZCBzaW5jZSB3ZQo+ID4gKyAq IGhhdmUgY2hhbmNlIHRvIGFkZCBtb3JlIGJ5dGVzCj4gPiArICovCj4gPiAraWYgKGlvdl9pdGVy X2NvdW50KGl0ZXIpICYmIGJpby0+YmlfaXRlci5iaV9zaXplKSB7Cj4gPiArdW5zaWduZWQgaW50 IGFsaWduZWRfc2l6ZSA9IChiaW8tPmJpX2l0ZXIuYmlfc2l6ZSArIHNpemUpICYKPiA+ICt+KEJJ T19DSFVOS19TSVpFIC0gMSk7Cj4gPiArCj4gPiAraWYgKGFsaWduZWRfc2l6ZSA8PSBiaW8tPmJp X2l0ZXIuYmlfc2l6ZSkgewo+ID4gKy8qIHN0b3AgdG8gYWRkIHBhZ2UgaWYgdGhpcyBiaW8gY2Fu J3Qga2VlcCBhbGlnbmVkICovCj4gPiAraWYgKCEoYmlvLT5iaV9pdGVyLmJpX3NpemUgJiAoQklP X0NIVU5LX1NJWkUgLSAxKSkpIHsKPiA+ICtyZXQgPSBsZWZ0ID0gc2l6ZTsKPiA+ICtnb3RvIHJl dmVydDsKPiA+ICt9Cj4gPiArfSBlbHNlIHsKPiA+ICthbGlnbmVkX3NpemUgLT0gYmlvLT5iaV9p dGVyLmJpX3NpemU7Cj4gPiAraW92X2l0ZXJfcmV2ZXJ0KGl0ZXIsIHNpemUgLSBhbGlnbmVkX3Np emUpOwo+ID4gK3NpemUgPSBhbGlnbmVkX3NpemU7Cj4gPiArfQo+ID4gK30KPiA+ICsKPiA+ICBp ZiAodW5saWtlbHkoIXNpemUpKSB7Cj4gPiAgcmV0ID0gLUVGQVVMVDsKPiA+ICBnb3RvIG91dDsK PiA+IEBAIC0xMjg1LDcgKzEzMTEsNyBAQCBzdGF0aWMgaW50IF9fYmlvX2lvdl9pdGVyX2dldF9w YWdlcyhzdHJ1Y3QgYmlvCj4gPiAqYmlvLCBzdHJ1Y3QgaW92X2l0ZXIgKml0ZXIpCj4gPiAgCj4g PiAgb2Zmc2V0ID0gMDsKPiA+ICB9Cj4gPiAtCj4gPiArcmV2ZXJ0Ogo+ID4gIGlvdl9pdGVyX3Jl dmVydChpdGVyLCBsZWZ0KTsKPiA+ICBvdXQ6Cj4gPiAgd2hpbGUgKGkgPCBucl9wYWdlcykKPiA+ IC0tIAo+ID4gMi40MS4wCj4gPiAKPiA+IAo+ID4gCj4gPiBUaGFua3MsIAo+ID4gTWluZwo+ID4g Cj4gCj4gVGhlIGxhdGVzdCBwYXRjaCB5b3UgcHJvdmlkZWQgd2l0aCAyNTYgYWxpZ25tZW50IGRv ZXMgaGVscCBhbGxldmlhdGUKPiB0aGUgc2V2ZXJpdHkgb2YgZnJhZ21lbnRhdGlvbi4gSG93ZXZl ciwgdGhlIGFjdHVhbCBhbGlnbmVkIHNpemUgbWF5Cj4gdmFyeSBkZXBlbmRpbmcgb24gdGhlIGRl dmljZS4gVXNpbmcgYSBmaXhlZCBhbmQgdW5pdmVyc2FsIHNpemUgb2YgMTI4Cj4gb3IgMjU2S0Ig b25seSBwcm92aWRlcyBwYXJ0aWFsIHJlbGllZiBmcm9tIGZyYWdtZW50YXRpb24uCj4gCj4gSSBw ZXJmb3JtZWQgYSBkZCBkaXJlY3QgSS9PIHJlYWQgb2YgNjRNQiB3aXRoIHlvdXIgcGF0Y2gsIGFu ZCBhbHRob3VnaAo+IG1vc3Qgb2YgdGhlIGJpb3Mgd2VyZSBhbGlnbmVkLCB0aGVyZSB3ZXJlIHN0 aWxsIGNhc2VzIG9mIG1pc3NhbGlnbm1lbnQKPiB0byB0aGUgZGV2aWNlIGxpbWl0IChlLmcuLCA1 MTJNQiBmb3IgbXkgZGV2aWNlKSwgYXMgc2hvd24gYmVsb3c6Cgo1MTJNQiBpcyByZWFsbHkgYmln LCBhbmQgYWN0dWFsbHkgeW91IGhhdmUgcmVhY2hlZCAzNTIwTUIgaW4gUkVBRCBieQpsaW1pdGlu ZyBtYXggYmlvIHNpemUgdG8gMU1CIGluIHlvdXIgb3JpZ2luYWwgcGF0Y2guCgpKdXN0IGJlIGN1 cmlvdXMgd2hhdCBpcyB0aGUgZGF0YSBpZiB5b3UgY2hhbmdlIHRvIGFsaWduIHdpdGggbWF4IHNl Y3RvcnMKYWdhaW5zdCBteSBsYXN0IHBhdGNoPyB3aGljaCBjYW4gdHJ5IHRvIG1heGltaXplICYg YWxpZ24gYmlvLgoKPiAKPiBkZCBbMDAwXSAuLi4uLiAzOTIuOTc2ODMwOiBibG9ja19iaW9fcXVl dWU6IDI1NCw1MiBSIDI5OTc3NjAgKyAzNTg0Cj4gZGQgWzAwMF0gLi4uLi4gMzkyLjk3OTk0MDog YmxvY2tfYmlvX3F1ZXVlOiAyNTQsNTIgUiAzMDAxMzQ0ICsgMzU4NAo+IGRkIFswMDBdIC4uLi4u IDM5Mi45ODMyMzU6IGJsb2NrX2Jpb19xdWV1ZTogMjU0LDUyIFIgMzAwNDkyOCArIDM1ODQKPiBk ZCBbMDAwXSAuLi4uLiAzOTIuOTg2NDY4OiBibG9ja19iaW9fcXVldWU6IDI1NCw1MiBSIDMwMDg1 MTIgKyAzNTg0CgpZZWFoLCBJIHRob3VnaHQgdGhhdCAxMjhLQiBzaG91bGQgYmUgZmluZSBmb3Ig dXN1YWwgaGFyZHdhcmUsIGJ1dApsb29rcyBub3QgZ29vZCBlbm91Z2guCgo+IAo+IENvbXBhcmlu ZyB0aGUgcmVzdWx0cyBvZiB0aGUgQW50dXR1IFNlcXVlbnRpYWwgdGVzdCB0byB0aGUgcHJldmlv dXMKPiBkYXRhLCBpdCBpcyBpbmRlZWQgYW4gaW1wcm92ZW1lbnQsIGJ1dCBzdGlsbCBhIHNsaWdo dCBkaWZmZXJlbmNlIHdpdGgKPiBsaW1pdGluZyB0aGUgYmlvIHNpemUgdG8gbWF4X3NlY3RvcnM6 Cj4gCj4gU2VxdWVudGlhbCBSZWFkIChhdmVyYWdlIG9mIDUgcm91bmRzKToKPiBPcmlnaW5hbDog MzAzMy43IE1CL3NlYwo+IExpbWl0ZWQgdG8gbWF4X3NlY3RvcnM6IDM1MjAuOSBNQi9zZWMKPiBB bGlnbmVkIDI1NktCOiAzNDcxLjUgTUIvc2VjCj4gCj4gU2VxdWVudGlhbCBXcml0ZSAoYXZlcmFn ZSBvZiA1IHJvdW5kcyk6Cj4gT3JpZ2luYWw6IDIyMjUuNCBNQi9zZWMKPiBMaW1pdGVkIHRvIG1h eF9zZWN0b3JzOiAyODAwLjMgTUIvc2VjCj4gQWxpZ25lZCAyNTZLQjogMjYxOC4xIE1CL3NlYwoK VGhhbmtzIGZvciBzaGFyaW5nIHRoZSBkYXRhLgoKPiAKPiBXaGF0IGlmIHdlIGxpbWl0IHRoZSBi aW8gc2l6ZSBvbmx5IGZvciB0aG9zZSB3aG8gaGF2ZSBzZXQgdGhlCj4gbWF4X3NlY3RvcnM/CgpJ IHRoaW5rIGl0IG1heSBiZSBkb2FibGUsIGJ1dCBuZWVkIG1vcmUgc21hcnQgYXBwcm9hY2ggZm9y IGF2b2lkaW5nCmV4dHJhIGNvc3Qgb2YgaW92X2l0ZXJfcmV2ZXJ0KCksIGFuZCBvbmUgd2F5IGlz IHRvIGFkZCBiaW9fc2hyaW5rKCkKKG9yIGJpb19yZXZlcnQoKSkgdG8gcnVuIHRoZSBhbGlnbm1l bnQganVzdCBvbmNlLgoKSSB3aWxsIHRoaW5rIGZ1cnRoZXIgYW5kIHdyaXRlIGEgbmV3IHBhdGNo IGlmIGl0IGlzIGRvYWJsZS4KCgoKVGhhbmtzLApNaW5nCgoKX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5nIGxpc3QK bGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5pbmZyYWRl YWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo=