From: Yinghai <yinghai.lu@oracle.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Andrew Morton <akpm@linux-foundation.org>,
David Miller <davem@davemloft.net>,
Linus Torvalds <torvalds@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org
Subject: Re: [PATCH 07/39] lmb: Add lmb_find_area()
Date: Mon, 12 Apr 2010 22:26:12 -0700 [thread overview]
Message-ID: <4BC40074.6030604@oracle.com> (raw)
In-Reply-To: <1271135239.13059.69.camel@pasglop>
On 04/12/2010 10:07 PM, Benjamin Herrenschmidt wrote:
> On Mon, 2010-04-12 at 21:29 -0700, Yinghai wrote:
>>
>>> Haven't you noticed there's already way too many functions walking
>> the
>>> LMBs ? :-)
>>
>> x86 is using original lmb_reserve, lmb_free(), but have own version
>> lmb_find_area(), and it will be dropped after
>> more testing of generic version of lmb_find_area()
>
> Do -not- add no APIs that are meant to be dropped. They never are in
> practice. What I'm saying here is that the LMB code (including existing
> stuff) could use some factoring in this area.
current generic lmb_find_area() is allocating from high to low.
x86 32bit seems have problem with that.
in this patchset, it is fixed, but not sure if i missed sth.
so could remove x86 lmb_find_area after more test coverage.
>
>>>
>>> I think the ones doing nid alloc could/should be also rewritten to
>> use
>>> one single low level __lmb_find_* no ?
>>
>> that nid_alloc() only has one user (sparc64).
>>
>> maybe could be replaced by lmd_find_area_node(), but need to make sure
>> early_node_map[] is filled at first.
>
> How does it work today ? IE. Which ever mechanism is used that works I
> don't care but we shouldn't use 2 different ones.
x86 is only use find_area_early() with node area scope, David point that could have problem with cross node mem map.
YH
next prev parent reply other threads:[~2010-04-13 5:29 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-09 6:03 [PATCH -v12 00/39] use lmb with x86 Yinghai Lu
2010-04-09 6:03 ` [PATCH 01/39] swiotlb: Use page alignment for early buffer allocation Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:03 ` [PATCH 02/39] x86: Add sanitize_e820_map() Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:03 ` [PATCH 03/39] x86: Align e820 ram range to page Yinghai Lu
2010-04-09 6:03 ` [PATCH 04/39] lmb: Move lmb.c to mm/ Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-13 3:52 ` Benjamin Herrenschmidt
2010-04-09 6:03 ` [PATCH 05/39] lmb: Seperate region array from lmb_region struct Yinghai Lu
2010-04-13 3:56 ` Benjamin Herrenschmidt
2010-04-09 6:03 ` [PATCH 06/39] lmb: Seperate __lmb_find_base() from __lmb_alloc_base() Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-13 3:58 ` Benjamin Herrenschmidt
2010-04-13 4:31 ` Yinghai
2010-04-09 6:03 ` [PATCH 07/39] lmb: Add lmb_find_area() Yinghai Lu
2010-04-13 4:05 ` Benjamin Herrenschmidt
2010-04-13 4:29 ` Yinghai
2010-04-13 5:07 ` Benjamin Herrenschmidt
2010-04-13 5:26 ` Yinghai [this message]
2010-04-13 5:46 ` H. Peter Anvin
2010-04-13 10:15 ` Benjamin Herrenschmidt
2010-04-09 6:03 ` [PATCH 08/39] lmb: Add lmb_reserve_area/lmb_free_area Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-13 4:15 ` Benjamin Herrenschmidt
2010-04-09 6:03 ` [PATCH 09/39] bootmem, x86: Add weak version of reserve_bootmem_generic Yinghai Lu
2010-04-09 6:03 ` [PATCH 10/39] lmb: Add lmb_to_bootmem() Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:03 ` [PATCH 11/39] lmb: Add get_free_all_memory_range() Yinghai Lu
2010-04-09 6:03 ` [PATCH 12/39] lmb: Add lmb_register_active_regions() and lmb_hole_size() Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:03 ` [PATCH 13/39] lmb: Prepare to include linux/lmb.h in core file Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:03 ` [PATCH 14/39] lmb: Add find_memory_core_early() Yinghai Lu
2010-04-09 6:03 ` [PATCH 15/39] lmb: Add lmb_find_area_node() Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-13 4:18 ` Benjamin Herrenschmidt
2010-04-13 4:37 ` Yinghai
2010-04-09 6:03 ` [PATCH 16/39] lmb: Add lmb_free_memory_size() Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:03 ` [PATCH 17/39] lmb: Add lmb_memory_size() Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:03 ` [PATCH 18/39] lmb: Add lmb_reserve_area_overlap_ok() Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-13 4:21 ` Benjamin Herrenschmidt
2010-04-13 4:44 ` Yinghai
2010-04-13 5:10 ` Benjamin Herrenschmidt
2010-04-13 5:37 ` Yinghai
2010-04-13 5:37 ` Yinghai
2010-04-09 6:03 ` [PATCH 19/39] lmb: Use lmb_debug to control debug message print out Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:03 ` [PATCH 20/39] lmb: Add ARCH_DISCARD_LMB to put lmb code to .init Yinghai Lu
2010-04-09 6:03 ` [PATCH 21/39] lmb: Add __free/__reserve/__clear_lmb_reserved_region_array() Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:03 ` [PATCH 22/39] x86, lmb: Add lmb_find_area_size() Yinghai Lu
2010-04-09 6:03 ` [PATCH 23/39] x86, lmb: Add x86 version of __lmb_find_area() Yinghai Lu
2010-04-09 6:03 ` [PATCH 24/39] x86: Use lmb to replace early_res Yinghai Lu
2010-04-09 6:03 ` [PATCH 25/39] x86: Replace e820_/_early string with lmb_ Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:03 ` [PATCH 26/39] nobootmem: use lmb.default_alloc_limit in alloc_bootmem path Yinghai Lu
2010-04-13 4:23 ` Benjamin Herrenschmidt
2010-04-13 4:50 ` Yinghai
2010-04-13 5:13 ` Benjamin Herrenschmidt
2010-04-13 5:42 ` Yinghai
2010-04-09 6:03 ` [PATCH 27/39] x86, lmb: turn off ARCH_LMB_FIND_AREA Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:03 ` [PATCH 28/39] x86: Remove not used early_res code Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:03 ` [PATCH 29/39] x86, lmb: Use lmb_memory_size()/lmb_free_memory_size() to get correct dma_reserve Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:03 ` [PATCH 30/39] x86: put 64 bit numa node memmap above 16M Yinghai Lu
2010-04-09 6:03 ` Yinghai Lu
2010-04-09 6:04 ` [PATCH 31/39] x86: Use wake_system_ram_range() instead of e820_any_mapped() in agp path Yinghai Lu
2010-04-09 6:04 ` Yinghai Lu
2010-04-09 6:04 ` [PATCH 32/39] x86: Add get_centaur_ram_top() Yinghai Lu
2010-04-09 6:04 ` Yinghai Lu
2010-04-09 6:04 ` [PATCH 33/39] x86: Change e820_any_mapped() to __init Yinghai Lu
2010-04-09 6:04 ` Yinghai Lu
2010-04-09 6:04 ` [PATCH 34/39] x86: Use walk_system_ream_range() instead of referring e820.map directly for tboot Yinghai Lu
2010-04-09 6:04 ` Yinghai Lu
2010-04-09 6:04 ` [PATCH 35/39] x86: make e820 to be __initdata Yinghai Lu
2010-04-09 6:04 ` Yinghai Lu
2010-04-09 6:04 ` [PATCH 36/39] bootmem: Add nobootmem.c to reduce the #ifdef Yinghai Lu
2010-04-09 6:04 ` Yinghai Lu
2010-04-09 6:04 ` [PATCH 37/39] mm: move contig_page_data define to bootmem.c/nobootmem.c Yinghai Lu
2010-04-09 6:04 ` [PATCH 38/39] lmb: move __alloc_memory_core_early() to nobootmem.c Yinghai Lu
2010-04-09 6:04 ` Yinghai Lu
2010-04-09 6:04 ` [PATCH 39/39] x86: have nobootmem version setup_bootmem_allocator() Yinghai Lu
2010-04-09 6:04 ` Yinghai Lu
2010-04-13 3:41 ` [PATCH -v12 00/39] use lmb with x86 Benjamin Herrenschmidt
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