From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gate.crashing.org (gate.crashing.org [63.228.1.57]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by bilbo.ozlabs.org (Postfix) with ESMTPS id 5414CB70BA for ; Mon, 3 Aug 2009 09:13:53 +1000 (EST) Subject: Re: BUG in dma-mapping.h:218 // MESH SCSI driver not working From: Benjamin Herrenschmidt To: Stef Simoens In-Reply-To: <4A7553E7.6030804@scarlet.be> References: <4A68E1CE.4040307@scarlet.be> <1248425553.25467.20.camel@pasglop> <4A70937B.7040201@scarlet.be> <1248910358.1509.27.camel@pasglop> <4A70DE54.5090406@scarlet.be> <1248915149.1509.29.camel@pasglop> <4A7553E7.6030804@scarlet.be> Content-Type: text/plain Date: Mon, 03 Aug 2009 09:13:37 +1000 Message-Id: <1249254817.18245.1.camel@pasglop> Mime-Version: 1.0 Cc: FUJITA Tomonori , James Bottomley , linuxppc-dev@lists.ozlabs.org, linux-scsi List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Sun, 2009-08-02 at 10:52 +0200, Stef Simoens wrote: > Hey Benjamin, > Thanks for the bisection. I'll have a look when I'm back from skiing :-) In the meantime, maybe Fujita has an idea ? Mesh is an old crappy piece of HW with an old driver full of dark secrets that Paulus wrote eons ago, so I'd rather avoid cracking it open :-) Cheers, Ben. > Benjamin Herrenschmidt schreef: > > On Thu, 2009-07-30 at 01:42 +0200, Stef Simoens wrote: > > > > > What would be the best approach? > > > - if the kernel boots, it's obviously 'good' > > > - but what if the kernel hits the 'BUG', should I apply your patch > > > then? If it doesn't work with your patch, would it be 'bad' then? > > > > A few reboots later... > As you said, during my bisecting, at a certain moment I needed your > patch (I booted, got a problem, patched the tree with your patch, > rebooted, it worked). > > Then, git says: > f078727b250c2653fc9a564f15547c17ebac3f99 is first bad commit > commit f078727b250c2653fc9a564f15547c17ebac3f99 > Author: FUJITA Tomonori > Date: Sun Dec 14 01:23:45 2008 +0900 > > [SCSI] remove scsi_req_map_sg > > No one uses scsi_execute_async with data transfer now. We can > remove > scsi_req_map_sg. > > Only scsi_eh_lock_door uses scsi_execute_async. scsi_eh_lock_door > doesn't handle sense and the callback. So we can remove > scsi_io_context too. > > Signed-off-by: FUJITA Tomonori > Signed-off-by: James Bottomley > > > :040000 040000 c4621d866c1ee5fd8d30e44f702a4966b8ebdc44 > 3ffca800399e52ef12f1001721c0c7ff431efafd M drivers > :040000 040000 805c02c4ad3c63c45dffa18f413e92bfca99caf6 > 6fb58bb5fb19c4198fa7d626d6241086655c6307 M include > > At this moment, the reason for the crash is different then in v2.6.30 > I noted the following (I hope to have written the most important > stuff). > driver 'sd' needs update > mesh: lost arbitration > sd 0:0:0:0 sda read CAPACITY failed > sd ... > sd 0:0:0:0 sdb read CAPACITY failed > sd ... > mice > sd ... > mice: PS/2 ... > TCP cubic ... > Initializing XFRM ... > NET ... protcol 17 > XFS ... > VFS : unable to mount root FS > > If you want more input ... please let me know. > -- > Kr, > Stef Simoens > plain text document attachment (git-bisect-log) > git bisect start > # good: [8e0ee43bc2c3e19db56a4adaa9a9b04ce885cd84] Linux 2.6.29 > git bisect good 8e0ee43bc2c3e19db56a4adaa9a9b04ce885cd84 > # bad: [577c9c456f0e1371cbade38eaf91ae8e8a308555] Linux 2.6.30-rc1 > git bisect bad 577c9c456f0e1371cbade38eaf91ae8e8a308555 > # bad: [5658ae9007490c18853fbf112f1b3516f5949e62] V4L/DVB (10342): gspca - stv06xx: Add ctrl caching to the vv6410. > git bisect bad 5658ae9007490c18853fbf112f1b3516f5949e62 > # good: [08abe18af1f78ee80c3c3a5ac47c3e0ae0beadf6] Merge branch 'master' of /home/davem/src/GIT/linux-2.6/ > git bisect good 08abe18af1f78ee80c3c3a5ac47c3e0ae0beadf6 > # good: [6e15cf04860074ad032e88c306bea656bbdd0f22] Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2 > git bisect good 6e15cf04860074ad032e88c306bea656bbdd0f22 > # bad: [eedf2c5296a8dfaaf9aec1a938c1d3bd73159a30] Merge git://git.kernel.org/pub/scm/linux/kernel/git/arjan/linux-2.6-async-for-30 > git bisect bad eedf2c5296a8dfaaf9aec1a938c1d3bd73159a30 > # good: [0870352bc6e0dee485c86a0c99dd60e7089c8917] Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-2.6 > git bisect good 0870352bc6e0dee485c86a0c99dd60e7089c8917 > # good: [febb02bdfe5e2c6ceaa0a38d8b7afca3d98f415a] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 > git bisect good febb02bdfe5e2c6ceaa0a38d8b7afca3d98f415a > # bad: [21283916322f579a580e413652cdefbfa3ec676f] [SCSI] zfcp: remove undefined subtype for status read response > git bisect bad 21283916322f579a580e413652cdefbfa3ec676f > # good: [6864abd8b730435d6ae9cb061095229a5a85153f] [SCSI] osd: Kconfig file for in-tree builds > git bisect good 6864abd8b730435d6ae9cb061095229a5a85153f > # bad: [b3f1f9aa082b2ab86dec4db3d8b1566af345387e] [SCSI] ses: code_set == 1 is tested twice > git bisect bad b3f1f9aa082b2ab86dec4db3d8b1566af345387e > # bad: [ea41e41588c248ee8b8162869c1e1c0565a4b3f6] [SCSI] scsi_dh_rdac: Retry for Quiescence in Progress in rdac device handler > git bisect bad ea41e41588c248ee8b8162869c1e1c0565a4b3f6 > # bad: [f078727b250c2653fc9a564f15547c17ebac3f99] [SCSI] remove scsi_req_map_sg > git bisect bad f078727b250c2653fc9a564f15547c17ebac3f99 > # good: [78a42ce8fb2604c459e9ebb2a4f2d546b8250111] [SCSI] osst: make all the buffer the same size > git bisect good 78a42ce8fb2604c459e9ebb2a4f2d546b8250111 > # good: [26243043f207b3faa00594a33e10b2103205f27b] [SCSI] osst: replace scsi_execute_async with the block layer API > git bisect good 26243043f207b3faa00594a33e10b2103205f27b