From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Jeff Chua <jeff.chua.linux@gmail.com>
Cc: Len Brown <len.brown@intel.com>,
linux-pm@lists.linux-foundation.org,
Jack Steiner <steiner@sgi.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
ACPI Devel Maling List <linux-acpi@vger.kernel.org>
Subject: Re: [linux-pm] Resume from Memory very slow on 2.6.37+
Date: Wed, 19 Jan 2011 02:38:18 +0100 [thread overview]
Message-ID: <201101190238.18529.rjw@sisk.pl> (raw)
In-Reply-To: <AANLkTikay6g5rOyDnv_ocz49GvUcQN+OkrusrbcRPB0K@mail.gmail.com>
On Wednesday, January 19, 2011, Jeff Chua wrote:
> On Wed, Jan 19, 2011 at 4:20 AM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
> > Please apply the appended patch (without the previous one) and post a dmesg
> > log containing a suspend-resume cycle with the delay. I wonder where exactly
> > the delay occurs.
> > + pr_info("%s: synchronize_rcu()\n", __func__);
> > synchronize_rcu();
> > + pr_info("%s: iounmap(%p), physaddr: %llx, size: %u\n", __func__,
> > + map->virt, map->phys, map->size);
>
> Rafael,
>
> The 30 seconds is due to this ...
>
> PM: Syncing filesystems ... done.
> Freezing user space processes ... _memory: synchronize_rcu()
> acpi_os_unmap_memory: iounmap(ffffc90001c22000), physaddr: bb398000, size: 4096
> acpi_os_unmap_memory: synchronize_rcu()
> acpi_os_unmap_memory: iounmap(ffffc90001c26000), physaddr: bb399000, size: 4096
> acpi_os_unmap_memory: synchronize_rcu()
> acpi_os_unmap_memory: iounmap(ffffc90001c2a000), physaddr: bb39a000, size: 4096
> acpi_os_unmap_memory: synchronize_rcu()
> acpi_os_unmap_memory: iounmap(ffffc90001c2e000), physaddr: bb39b000, size: 4096
> <repeat till ...>
> acpi_os_unmap_memory: iounmap(ffffc90003538000), physaddr: bb79d000, size: 4096
> acpi_os_unmap_memory: synchronize_rcu()
> acpi_os_unmap_memory: iounmap(ffffc9000353c000), physaddr: bb79e000, size: 4096
> Restarting tasks ... done.
>
> After this, I see my X windows.
Are you able to say whether the synchronize_rcu() or the iounmap() calls block?
Rafael
next prev parent reply other threads:[~2011-01-19 1:39 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <AANLkTimBEnKTuR5aQyXvpZX8grQPw1eCaVgP-k9yBXhv@mail.gmail.com>
2011-01-17 18:55 ` Resume from Memory very slow on 2.6.37+ Brown, Len
2011-01-17 22:49 ` Rafael J. Wysocki
2011-01-18 0:14 ` [linux-pm] " Rafael J. Wysocki
2011-01-18 1:14 ` Jeff Chua
2011-01-18 1:35 ` Rafael J. Wysocki
2011-01-18 5:19 ` Jeff Chua
2011-01-18 20:20 ` Rafael J. Wysocki
2011-01-19 1:20 ` Jeff Chua
2011-01-19 1:38 ` Rafael J. Wysocki [this message]
2011-01-19 14:13 ` Jeff Chua
2011-01-19 21:19 ` Rafael J. Wysocki
2011-01-19 21:27 ` [1/2] ACPI: Introduce acpi_os_ioremap() Rafael J. Wysocki
2011-01-19 21:27 ` [2/2] ACPI / PM: Call suspend_nvs_free() earlier during resume Rafael J. Wysocki
2011-01-20 1:21 ` [linux-pm] Resume from Memory very slow on 2.6.37+ Jeff Chua
2011-01-20 1:50 ` Rafael J. Wysocki
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