From: Jesse Barnes <jbarnes@virtuousgeek.org>
To: Ram Pai <linuxram@us.ibm.com>
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
clemens@ladisch.de, Yinghai Lu <yinghai@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Bjorn Helgaas <bjorn.helgaas@hp.com>
Subject: Re: [PATCH 4/4] PCI: pre-allocate additional resources to devices only after successful allocation of essential resources.
Date: Fri, 4 Mar 2011 10:47:30 -0800 [thread overview]
Message-ID: <20110304104730.09ded35f@jbarnes-desktop> (raw)
In-Reply-To: <1297734200-23327-5-git-send-email-linuxram@us.ibm.com>
On Mon, 14 Feb 2011 17:43:20 -0800
Ram Pai <linuxram@us.ibm.com> wrote:
> Linux tries to pre-allocate minimal resources to hotplug bridges. This
> works fine as long as there are enough resources to satisfy all other
> genuine resource requirements. However if enough resources are not
> available to satisfy any of these nice-to-have pre-allocations, the
> resource-allocator reports errors and returns failure.
>
> This patch distinguishes between must-have resource from nice-to-have
> resource. Any failure to allocate nice-to-have resources are ignored.
>
> This behavior can be particularly useful to trigger automatic
> reallocation when the OS discovers genuine allocation-conflicts
> or genuine unallocated-requests caused by buggy allocation behavior
> of the native BIOS/uEFI.
>
> https://bugzilla.kernel.org/show_bug.cgi?id=15960 captures the movitation
> behind the patch. This patch is verified to resolve the above bug.
Ok, applied this series. Everyone please test thoroughly as resource
changes always seem to bite us.
--
Jesse Barnes, Intel Open Source Technology Center
prev parent reply other threads:[~2011-03-04 18:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-15 1:43 [PATCH 0/4] PCI: preallocate resource patch series Ram Pai
2011-02-15 1:43 ` [PATCH 1/4] PCI: refactor io size calculation code Ram Pai
2011-02-15 1:43 ` [PATCH 2/4] PCI: data structure agnostic free list function Ram Pai
2011-02-15 1:43 ` [PATCH 3/4] PCI: introduce reset_resource() Ram Pai
2011-02-25 22:56 ` Jesse Barnes
2011-02-15 1:43 ` [PATCH 4/4] PCI: pre-allocate additional resources to devices only after successful allocation of essential resources Ram Pai
2011-03-04 18:47 ` Jesse Barnes [this message]
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