Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754388AbZGCD6r (ORCPT ); Thu, 2 Jul 2009 23:58:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752834AbZGCD6i (ORCPT ); Thu, 2 Jul 2009 23:58:38 -0400 Received: from rv-out-0506.google.com ([209.85.198.231]:22388 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751475AbZGCD6g (ORCPT ); Thu, 2 Jul 2009 23:58:36 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:from:reply-to:to:cc:in-reply-to:references:content-type :organization:date:message-id:mime-version:x-mailer :content-transfer-encoding; b=tlIn+hb/BemhIl5iS1JYjLXD+2SqsbzqOClTbUjzKcX0wo92nLOjlpDly0kJ878col uKUIGuQePrh5eYdOSNQwFj+Fah4hXzborJJoO42orgGpi3xEIoPCW49A+jbV7iJVgBt9 NAr6fEXBQ384IHug0PwG9VPqo6ny+gkEBBxKo= Subject: Re: [Bug #13663] suspend to ram regression (IDE related) From: Wu Zhangjin Reply-To: wuzhangjin@gmail.com To: Bartlomiej Zolnierkiewicz Cc: Jeff Chua , Etienne Basset , David Miller , rjw@sisk.pl, linux-kernel@vger.kernel.org, kernel-testers@vger.kernel.org, Ralf Baechle , linux-mips@linux-mips.org, linux-ide@vger.kernel.org In-Reply-To: <200907021813.57322.bzolnier@gmail.com> References: <200907011829.16850.bzolnier@gmail.com> <1246499203.9660.52.camel@falcon> <200907021813.57322.bzolnier@gmail.com> Content-Type: text/plain Organization: DSLab, Lanzhou University, China Date: Fri, 03 Jul 2009 11:58:25 +0800 Message-Id: <1246593505.27828.187.camel@falcon> Mime-Version: 1.0 X-Mailer: Evolution 2.26.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7578 Lines: 200 On Thu, 2009-07-02 at 18:13 +0200, Bartlomiej Zolnierkiewicz wrote: > On Thursday 02 July 2009 03:46:43 Wu Zhangjin wrote: > > On Wed, 2009-07-01 at 18:29 +0200, Bartlomiej Zolnierkiewicz wrote: > > > On Wednesday 01 July 2009 18:21:25 Bartlomiej Zolnierkiewicz wrote: > > > > On Wednesday 01 July 2009 16:47:41 Wu Zhangjin wrote: > > > > > On Wed, 2009-07-01 at 22:31 +0800, Jeff Chua wrote: > > > > > > On Tue, Jun 30, 2009 at 12:21 AM, Jeff Chua wrote: > > > > > > > > > > > > > I just tried, and it "seems" to work. Will try a few more cycles. > > > > > > > > > > > > STD/STR survived quite a few cycles now. Patch seems to be doing the > > > > > > right thing. > > > > > > > > > > > > On Mon, Jun 29, 2009 at 11:51 PM, Etienne > > > > > > Basset wrote: > > > > > > > > > > > > > To have STR/resume work with current git, I have to : > > > > > > > > > > > > > 1) apply Bart's patch > > > > > > > > > > > > This is not yet in Linus's tree. And much needed to really fix the problem. > > > > > > > > > > > > > 2) revert this commit : a1317f714af7aed60ddc182d0122477cbe36ee9b > > > > > > > > > > > > > > > > Yes, This commit must be reverted, otherwise, STD/Hibernation will not > > > > > work either. I have tested it on two different loongson-based machines: > > > > > fuloong2e box and yeeloong2f netbook.(loongson is mips compatiable) > > > > > > > > Since it seems like Dave is taking his sweet time with doing the revert > > > > I stared at the code a bit more and I think that I finally found the bug > > > > (thanks to your debugging work for giving me the right hint!). > > > > > > > > The patch needs to take into the account a new code introduced by the recent > > > > block layer changes (commit 8f6205cd572fece673da0255d74843680f67f879): > > > > > > > > @@ -555,8 +560,11 @@ repeat: > > > > startstop = start_request(drive, rq); > > > > spin_lock_irq(&hwif->lock); > > > > > > > > - if (startstop == ide_stopped) > > > > + if (startstop == ide_stopped) { > > > > + rq = hwif->rq; > > > > + hwif->rq = NULL; > > > > goto repeat; > > > > + } > > > > } else > > > > goto plug_device; > > > > out: > > > > > > > > and not zero hwif->rq if the device is blocked. > > > > > > > > Could you try the attached patch and see if it fixes the issue? > > > > > > Here is the more complete version, also taking into the account changes > > > in ide_intr() and ide_timer_expiry(): > > > > > > > Sorry, I can not apply this patch directly, which original version did > > you use? I used the one in the master branch of linux-mips development > > git repository. > > > > commit 5a4f13fad1ab5bd08dea78fc55321e429d83cddf > > Merge: ec9c45d e18ed14 > > Author: Linus Torvalds > > Date: Mon Jun 29 20:07:43 2009 -0700 > > > > Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6 > > > > * git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6: > > ide: memory overrun in ide_get_identity_ioctl() on big endian > > machines using ioctl HDIO_OBSOLETE_IDENTITY > > ide: fix resume for CONFIG_BLK_DEV_IDEACPI=y > > ide-cd: handle fragmented packet commands gracefully > > ide: always kill the whole request on error > > ide: fix ide_kill_rq() for special ide-{floppy,tape} driver > > requests > > > > it this too old? should i merge another git repository? > > Weird, I used linux-next but Linus' tree should also be fine > (as it matches linux-next w.r.t. ide currently). I just cloned the linux-next git repo, and tested your patch with STD/Hibernation, unfortunately, it also not work :-( here is the Call Trace: blk_delete_timer+0x0/0x20 blk_requeue_request+0x24/0xd0 ide_requeue_and_plug+0x38/0xb0 ide_intr+0x120/0x300 ---> ide_intr.... handle_IRQ_event+0x94/0x230 handle_level_irq+0x7c/0x120 mach_irq_dispatch+0xc8/0x158 ret_from_irq+0x0/0x4 cpu_idle+0x30/0x60 start_kernel+0x330/0x34c If _NOT_ apply your patch and comment this part, it works: diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c index d5f3c77..a45de2b 100644 --- a/drivers/ide/ide-io.c +++ b/drivers/ide/ide-io.c @@ -468,12 +468,12 @@ void do_ide_request(struct request_queue *q) ide_hwif_t *prev_port; repeat: prev_port = hwif->host->cur_port; - +/* if (drive->dev_flags & IDE_DFLAG_BLOCKED) rq = hwif->rq; else WARN_ON_ONCE(hwif->rq); - +*/ if (drive->dev_flags & IDE_DFLAG_SLEEPING && time_after(drive->sleep, jiffies)) { ide_unlock_port(hwif); Regards, Wu Zhangjin > > Anyway since the patch was confirmed to fix the problem by > Jeff and Etienne here is the final version for Dave. > > From: Bartlomiej Zolnierkiewicz > Subject: [PATCH] ide: make resume work again > > It turns out that commit a1317f714af7aed60ddc182d0122477cbe36ee9b > ("ide: improve handling of Power Management requests") needs to take > into the account a new code added by the recent block layer changes > in commit 8f6205cd572fece673da0255d74843680f67f879 ("ide: dequeue > in-flight request") and prevent clearing of hwif->rq if the device > is blocked. > > Thanks to Etienne, Wu and Jeff for help in fixing the issue. > > Reported-and-tested-by: Jeff Chua > Reported-and-tested-by: Etienne Basset > Reported-by: Wu Zhangjin > Signed-off-by: Bartlomiej Zolnierkiewicz > --- > Added patch description, no other changes. > > drivers/ide/ide-io.c | 15 ++++++++++----- > 1 file changed, 10 insertions(+), 5 deletions(-) > > Index: b/drivers/ide/ide-io.c > =================================================================== > --- a/drivers/ide/ide-io.c > +++ b/drivers/ide/ide-io.c > @@ -532,7 +532,8 @@ repeat: > > if (startstop == ide_stopped) { > rq = hwif->rq; > - hwif->rq = NULL; > + if ((drive->dev_flags & IDE_DFLAG_BLOCKED) == 0) > + hwif->rq = NULL; > goto repeat; > } > } else > @@ -679,8 +680,10 @@ void ide_timer_expiry (unsigned long dat > spin_lock_irq(&hwif->lock); > enable_irq(hwif->irq); > if (startstop == ide_stopped && hwif->polling == 0) { > - rq_in_flight = hwif->rq; > - hwif->rq = NULL; > + if ((drive->dev_flags & IDE_DFLAG_BLOCKED) == 0) { > + rq_in_flight = hwif->rq; > + hwif->rq = NULL; > + } > ide_unlock_port(hwif); > plug_device = 1; > } > @@ -856,8 +859,10 @@ irqreturn_t ide_intr (int irq, void *dev > */ > if (startstop == ide_stopped && hwif->polling == 0) { > BUG_ON(hwif->handler); > - rq_in_flight = hwif->rq; > - hwif->rq = NULL; > + if ((drive->dev_flags & IDE_DFLAG_BLOCKED) == 0) { > + rq_in_flight = hwif->rq; > + hwif->rq = NULL; > + } > ide_unlock_port(hwif); > plug_device = 1; > } > -- > To unsubscribe from this list: send the line "unsubscribe linux-ide" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/