From: Tejun Heo <tj@kernel.org>
To: Yinghai Lu <yinghai@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@elte.hu>,
Christoph Lameter <cl@linux-foundation.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Jesse Barnes <jbarnes@virtuousgeek.org>,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
Pekka Enberg <penberg@cs.helsinki.fi>
Subject: Re: [PATCH 16/35] x86: make 64 bit use early_res instead of bootmem before slab
Date: Thu, 25 Feb 2010 11:07:53 +0900 [thread overview]
Message-ID: <4B85DB79.4010708@kernel.org> (raw)
In-Reply-To: <4B85B724.9050304@kernel.org>
Hello, Yinghai.
On 02/25/2010 08:32 AM, Yinghai Lu wrote:
>>> Kernel panic - not syncing: free_early on not reserved area: 2f80000-2f9ffff!
>>> Pid: 0, comm: swapper Not tainted 2.6.33-rc8-tip-00918-gb34d361 #159
>>> Call Trace:
>>> [<ffffffff815d12e2>] panic+0x84/0x147
>>> [<ffffffff81cceecb>] free_early+0x64/0x6d
>>> [<ffffffff81cd2231>] free_bootmem+0xc/0xe
>>> [<ffffffff81cc1cd6>] pcpu_fc_free+0x1d/0x1f
>>> [<ffffffff81cd6056>] pcpu_embed_first_chunk+0x13a/0x27f
>>> [<ffffffff81cc1cd8>] ? pcpu_fc_alloc+0x0/0xac
>>> [<ffffffff81cc1cb9>] ? pcpu_fc_free+0x0/0x1f
>>> [<ffffffff81cc1af7>] setup_per_cpu_areas+0x82/0x239
>>> [<ffffffff81cb5b3c>] start_kernel+0x1b8/0x43b
>>> [<ffffffff81cb52bc>] x86_64_start_reservations+0xa7/0xab
>>> [<ffffffff81cb53b8>] x86_64_start_kernel+0xf8/0x107
>>>
>>
>> we can not handle partial free, and current only user for that is pcpu_setup...
>
> any plan to pcpu_setup to use slab allocation instead of bootmem?
> that code is only one user that do partial bootmem free.
The problem is that the pcpu_embed_first_chunk() allocator depends on
having a large contiguous slab of memory to overlay the percpu
variables and then giving back the unused parts (due to layout and
cpu_possible_mask not being contiguous). There's no way to do partial
alloc/free anymore?
Thanks.
--
tejun
next prev parent reply other threads:[~2010-02-25 1:59 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-10 9:20 [PATCH -v7 0/35] tip related: not use bootmem for x86 Yinghai Lu
2010-02-10 9:20 ` [PATCH 01/35] x86: fix sci on ioapic 1 Yinghai Lu
2010-02-10 22:48 ` [tip:x86/urgent] x86: Fix SCI on IOAPIC != 0 tip-bot for Yinghai Lu
2010-02-10 9:20 ` [PATCH 02/35] x86: keep chip_data in create_irq_nr and destroy_irq Yinghai Lu
2010-02-10 22:39 ` [tip:x86/irq] x86: Avoid race condition in pci_enable_msix() tip-bot for Brandon Phiilps
2010-02-10 9:20 ` [PATCH 03/35] x86: move range related operation to one file Yinghai Lu
2010-02-10 9:20 ` [PATCH 04/35] x86/pci: use resource_size_t in update_res Yinghai Lu
2010-02-10 9:20 ` [PATCH 05/35] x86/pci: amd one chain system to use pci read out res Yinghai Lu
2010-02-10 9:20 ` [PATCH 06/35] x86/pci: use u64 instead of size_t in amd_bus.c Yinghai Lu
2010-02-10 9:20 ` [PATCH 07/35] x86/pci: add cap_resource Yinghai Lu
2010-02-10 9:20 ` [PATCH 08/35] x86/pci: enable pci root res read out for 32bit too Yinghai Lu
2010-02-10 9:20 ` [PATCH 09/35] x86: change range end to start+size Yinghai Lu
2010-02-10 9:20 ` [PATCH 10/35] x86: print out for RAM buffer Yinghai Lu
2010-02-10 9:20 ` [PATCH 11/35] x86: call early_res_to_bootmem one time Yinghai Lu
2010-02-10 9:20 ` [PATCH 12/35] x86: introduce max_early_res and early_res_count Yinghai Lu
2010-02-10 9:20 ` [PATCH 13/35] x86: dynamic increase early_res array size Yinghai Lu
2010-02-10 9:20 ` [PATCH 14/35] x86: make early_node_mem get mem > 4g if possible Yinghai Lu
2010-02-10 9:20 ` [PATCH 15/35] x86: only call dma32_reserve_bootmem 64bit !CONFIG_NUMA Yinghai Lu
2010-02-10 9:20 ` [PATCH 16/35] x86: make 64 bit use early_res instead of bootmem before slab Yinghai Lu
2010-02-14 14:08 ` Stephen Rothwell
2010-02-14 20:31 ` Yinghai Lu
2010-02-17 1:16 ` Yinghai Lu
2010-02-24 22:59 ` Peter Zijlstra
2010-02-24 23:29 ` Yinghai Lu
2010-02-24 23:32 ` Yinghai Lu
2010-02-25 2:07 ` Tejun Heo [this message]
2010-02-25 2:13 ` Yinghai Lu
2010-02-25 2:33 ` Tejun Heo
2010-02-25 2:36 ` [PATCH] early_res: add free_early_partial Yinghai Lu
2010-02-25 11:10 ` Peter Zijlstra
2010-03-02 2:48 ` [PATCH] early_res: need to save name aside with free_early_partial Yinghai Lu
2010-02-10 9:20 ` [PATCH 17/35] sparsemem: put usemap for one node together Yinghai Lu
2010-02-10 9:20 ` [PATCH 18/35] sparsemem: put mem map " Yinghai Lu
2010-02-10 9:20 ` [PATCH 19/35] x86: move bios page reserve early to head32/64.c Yinghai Lu
2010-02-10 9:20 ` [PATCH 20/35] x86: seperate early_res related code from e820.c Yinghai Lu
2010-02-10 9:20 ` [PATCH 21/35] x86: add find_early_area_size Yinghai Lu
2010-02-10 9:20 ` [PATCH 22/35] x86: move back find_e820_area to e820.c Yinghai Lu
2010-02-10 9:20 ` [PATCH 23/35] early_res: enhance check_and_double_early_res Yinghai Lu
2010-02-10 9:20 ` [PATCH 24/35] x86: make 32bit support NO_BOOTMEM Yinghai Lu
2010-02-10 9:20 ` [PATCH 25/35] move round_up/down to kernel.h Yinghai Lu
2010-02-13 18:49 ` Joe Perches
2010-02-13 19:52 ` H. Peter Anvin
2010-02-13 20:11 ` Andrew Morton
2010-02-13 21:57 ` H. Peter Anvin
2010-02-10 9:20 ` [PATCH 26/35] x86: add find_fw_memmap_area Yinghai Lu
2010-02-10 9:20 ` [PATCH 27/35] core: move early_res Yinghai Lu
2010-02-14 14:16 ` Stephen Rothwell
2010-02-14 17:08 ` Ingo Molnar
2010-02-14 23:43 ` Stephen Rothwell
2010-02-15 4:44 ` Ingo Molnar
2010-02-14 20:46 ` Yinghai Lu
2010-02-16 23:46 ` H. Peter Anvin
2010-02-16 23:53 ` Yinghai Lu
2010-02-17 0:01 ` H. Peter Anvin
2010-02-17 0:41 ` Yinghai Lu
2010-02-17 0:46 ` H. Peter Anvin
2010-02-17 1:10 ` Yinghai Lu
2010-02-17 2:40 ` Yinghai Lu
2010-02-10 9:20 ` [PATCH 28/35] irq: remove not need bootmem code Yinghai Lu
2010-02-18 1:57 ` [tip:x86/irq] irq: Remove unnecessary " tip-bot for Yinghai Lu
2010-02-10 9:20 ` [PATCH 29/35] radix: move radix init early Yinghai Lu
2010-02-18 1:57 ` [tip:x86/irq] init: Move radix_tree_init() early tip-bot for Yinghai Lu
2010-02-10 9:20 ` [PATCH 30/35] sparseirq: change irq_desc_ptrs to static Yinghai Lu
2010-02-18 1:58 ` [tip:x86/irq] sparseirq: Change " tip-bot for Yinghai Lu
2010-02-10 9:20 ` [PATCH 31/35] sparseirq: use radix_tree instead of ptrs array Yinghai Lu
2010-02-18 1:58 ` [tip:x86/irq] sparseirq: Use " tip-bot for Yinghai Lu
2010-02-10 9:20 ` [PATCH 32/35] x86: remove arch_probe_nr_irqs Yinghai Lu
2010-02-18 1:58 ` [tip:x86/irq] x86, irq: Remove arch_probe_nr_irqs tip-bot for Yinghai Lu
2010-02-10 9:20 ` [PATCH 33/35] use nr_cpus= to set nr_cpu_ids early Yinghai Lu
2010-02-18 1:59 ` [tip:x86/irq] smp: Use " tip-bot for Yinghai Lu
2010-02-10 9:20 ` [PATCH 34/35] x86: use num_processors for possible cpus Yinghai Lu
2010-02-18 1:32 ` H. Peter Anvin
2010-02-18 2:38 ` Yinghai Lu
2010-02-18 17:26 ` H. Peter Anvin
2010-02-18 19:48 ` Christoph Lameter
2010-02-18 19:53 ` H. Peter Anvin
2010-02-19 15:14 ` Christoph Lameter
2010-02-19 16:14 ` H. Peter Anvin
2010-02-10 9:20 ` [PATCH 35/35] x86: make 32bit apic flat to physflat switch like 64bit Yinghai Lu
2010-02-11 16:14 ` [PATCH -v7 0/35] tip related: not use bootmem for x86 Ingo Molnar
2010-02-11 21:10 ` Yinghai Lu
2010-02-15 2:27 ` Benjamin Herrenschmidt
2010-02-15 4:50 ` Yinghai Lu
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