From: Randy Dunlap <rdunlap@infradead.org>
To: Anthony Yznaga <anthony.yznaga@oracle.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Cc: willy@infradead.org, corbet@lwn.net, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com,
dave.hansen@linux.intel.com, luto@kernel.org,
peterz@infradead.org, rppt@linux.ibm.com,
akpm@linux-foundation.org, hughd@google.com,
ebiederm@xmission.com, masahiroy@kernel.org, ardb@kernel.org,
ndesaulniers@google.com, dima@golovin.in,
daniel.kiper@oracle.com, nivedita@alum.mit.edu,
rafael.j.wysocki@intel.com, dan.j.williams@intel.com,
zhenzhong.duan@oracle.com, jroedel@suse.de, bhe@redhat.com,
guro@fb.com, Thomas.Lendacky@amd.com,
andriy.shevchenko@linux.intel.com, keescook@chromium.org,
hannes@cmpxchg.org, minchan@kernel.org, mhocko@kernel.org,
ying.huang@intel.com, yang.shi@linux.alibaba.com,
gustavo@embeddedor.com, ziqian.lzq@antfin.com,
vdavydov.dev@gmail.com, jason.zeng@intel.com,
kevin.tian@intel.com, zhiyuan.lv@intel.com, lei.l.li@intel.com,
paul.c.lai@intel.com, ashok.raj@intel.com,
linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org,
kexec@lists.infradead.org
Subject: Re: [RFC 34/43] shmem: PKRAM: multithread preserving and restoring shmem pages
Date: Thu, 7 May 2020 09:30:55 -0700 [thread overview]
Message-ID: <4e44858d-a416-696e-0d65-0b5ca8836b7d@infradead.org> (raw)
In-Reply-To: <1588812129-8596-35-git-send-email-anthony.yznaga@oracle.com>
On 5/6/20 5:42 PM, Anthony Yznaga wrote:
> Improve performance by multithreading the work to preserve and restore
> shmem pages.
>
> Add 'pkram_max_threads=' kernel option to specify the maximum number
> of threads to use to preserve or restore the pages of a shmem file.
> The default is 16.
Hi,
Please document kernel boot options in Documentation/admin-guide/kernel-parameters.txt.
> When preserving pages each thread saves chunks of a file to a pkram_obj
> until no more no more chunks are available.
>
> When restoring pages each thread loads pages using a copy of a
> pkram_stream initialized by pkram_prepare_load_obj(). Under the hood
> each thread ends up fetching and operating on pkram_link pages.
>
> Signed-off-by: Anthony Yznaga <anthony.yznaga@oracle.com>
> ---
> include/linux/pkram.h | 2 +
> mm/shmem_pkram.c | 101 +++++++++++++++++++++++++++++++++++++++++++++++++-
> 2 files changed, 101 insertions(+), 2 deletions(-)
thanks.
--
~Randy
next prev parent reply other threads:[~2020-05-07 16:31 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-07 0:41 [RFC 00/43] PKRAM: Preserved-over-Kexec RAM Anthony Yznaga
2020-05-07 0:41 ` [RFC 01/43] mm: add PKRAM API stubs and Kconfig Anthony Yznaga
2020-05-07 0:41 ` [RFC 02/43] mm: PKRAM: implement node load and save functions Anthony Yznaga
2020-05-07 0:41 ` [RFC 03/43] mm: PKRAM: implement object " Anthony Yznaga
2020-05-07 0:41 ` [RFC 04/43] mm: PKRAM: implement page stream operations Anthony Yznaga
2020-05-07 0:41 ` [RFC 05/43] mm: PKRAM: support preserving transparent hugepages Anthony Yznaga
2020-05-07 0:41 ` [RFC 06/43] mm: PKRAM: implement byte stream operations Anthony Yznaga
2020-05-07 0:41 ` [RFC 07/43] mm: PKRAM: link nodes by pfn before reboot Anthony Yznaga
2020-05-07 0:41 ` [RFC 08/43] mm: PKRAM: introduce super block Anthony Yznaga
2020-05-07 0:41 ` [RFC 09/43] PKRAM: build a physical mapping pagetable of pages to be preserved Anthony Yznaga
2020-05-07 0:41 ` [RFC 10/43] PKRAM: add code for walking the preserved pages pagetable Anthony Yznaga
2020-05-07 0:41 ` [RFC 11/43] PKRAM: pass the preserved pages pagetable to the next kernel Anthony Yznaga
2020-05-07 0:41 ` [RFC 12/43] mm: PKRAM: reserve preserved memory at boot Anthony Yznaga
2020-05-07 0:41 ` [RFC 13/43] mm: PKRAM: free preserved pages pagetable Anthony Yznaga
2020-05-07 0:41 ` [RFC 14/43] mm: memblock: PKRAM: prevent memblock resize from clobbering preserved pages Anthony Yznaga
2020-05-11 13:57 ` Mike Rapoport
2020-05-11 23:29 ` Anthony Yznaga
2020-05-07 0:41 ` [RFC 15/43] PKRAM: provide a way to ban pages from use by PKRAM Anthony Yznaga
2020-05-07 0:41 ` [RFC 16/43] kexec: PKRAM: prevent kexec clobbering preserved pages in some cases Anthony Yznaga
2020-05-07 0:41 ` [RFC 17/43] PKRAM: provide a way to check if a memory range has preserved pages Anthony Yznaga
2020-05-07 0:41 ` [RFC 18/43] kexec: PKRAM: avoid clobbering already " Anthony Yznaga
2020-05-07 0:41 ` [RFC 19/43] mm: PKRAM: allow preserved memory to be freed from userspace Anthony Yznaga
2020-05-07 0:41 ` [RFC 20/43] PKRAM: disable feature when running the kdump kernel Anthony Yznaga
2020-05-07 0:41 ` [RFC 21/43] x86/KASLR: PKRAM: support physical kaslr Anthony Yznaga
2020-05-07 17:51 ` Kees Cook
2020-05-07 18:41 ` Anthony Yznaga
2020-05-07 0:41 ` [RFC 22/43] mm: shmem: introduce shmem_insert_page Anthony Yznaga
2020-05-07 0:41 ` [RFC 23/43] mm: shmem: enable saving to PKRAM Anthony Yznaga
2020-05-07 0:41 ` [RFC 24/43] mm: shmem: prevent swapping of PKRAM-enabled tmpfs pages Anthony Yznaga
2020-05-07 0:41 ` [RFC 25/43] mm: shmem: specify the mm to use when inserting pages Anthony Yznaga
2020-05-07 0:41 ` [RFC 26/43] mm: shmem: when inserting, handle pages already charged to a memcg Anthony Yznaga
2020-05-07 0:41 ` [RFC 27/43] x86/mm/numa: add numa_isolate_memblocks() Anthony Yznaga
2020-05-07 0:41 ` [RFC 28/43] PKRAM: ensure memblocks with preserved pages init'd for numa Anthony Yznaga
2020-05-07 0:41 ` [RFC 29/43] memblock: PKRAM: mark memblocks that contain preserved pages Anthony Yznaga
2020-05-07 0:41 ` [RFC 30/43] memblock: add for_each_reserved_mem_range() Anthony Yznaga
2020-05-07 0:41 ` [RFC 31/43] memblock, mm: defer initialization of preserved pages Anthony Yznaga
2020-05-07 0:41 ` [RFC 32/43] shmem: PKRAM: preserve shmem files a chunk at a time Anthony Yznaga
2020-05-07 0:41 ` [RFC 33/43] PKRAM: atomically add and remove link pages Anthony Yznaga
2020-05-07 0:42 ` [RFC 34/43] shmem: PKRAM: multithread preserving and restoring shmem pages Anthony Yznaga
2020-05-07 16:30 ` Randy Dunlap [this message]
2020-05-07 17:59 ` Anthony Yznaga
2020-05-07 0:42 ` [RFC 35/43] shmem: introduce shmem_insert_pages() Anthony Yznaga
2020-05-07 0:42 ` [RFC 36/43] PKRAM: add support for loading pages in bulk Anthony Yznaga
2020-05-07 0:42 ` [RFC 37/43] shmem: PKRAM: enable bulk loading of preserved pages into shmem Anthony Yznaga
2020-05-07 0:42 ` [RFC 38/43] mm: implement splicing a list of pages to the LRU Anthony Yznaga
2020-05-07 0:42 ` [RFC 39/43] shmem: optimize adding pages to the LRU in shmem_insert_pages() Anthony Yznaga
2020-05-07 0:42 ` [RFC 40/43] shmem: initial support for adding multiple pages to pagecache Anthony Yznaga
2020-05-07 0:42 ` [RFC 41/43] XArray: add xas_export_node() and xas_import_node() Anthony Yznaga
2020-05-07 0:42 ` [RFC 42/43] shmem: reduce time holding xa_lock when inserting pages Anthony Yznaga
2020-05-07 0:42 ` [RFC 43/43] PKRAM: improve index alignment of pkram_link entries Anthony Yznaga
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