From: Richard Henderson <richard.henderson@linaro.org>
To: junyan.he@gmx.com, qemu-devel@nongnu.org
Cc: ehabkost@redhat.com, imammedo@redhat.com, pbonzini@redhat.com,
crosthwaite.peter@gmail.com, xiaoguangrong.eric@gmail.com,
mst@redhat.com, quintela@redhat.com, dgilbert@redhat.com,
stefanha@redhat.com, yi.z.zhang@intel.com,
Junyan He <junyan.he@intel.com>,
Haozhong Zhang <haozhong.zhang@intel.com>
Subject: Re: [Qemu-devel] [PATCH 3/7 V10] configure: add libpmem support
Date: Tue, 17 Jul 2018 09:05:02 -0700 [thread overview]
Message-ID: <4823f4cf-762e-f3cc-dae2-9e323a383f52@linaro.org> (raw)
In-Reply-To: <1531809130-31088-4-git-send-email-junyan.he@gmx.com>
On 07/16/2018 11:32 PM, junyan.he@gmx.com wrote:
> From: Junyan He <junyan.he@intel.com>
>
> Add a pair of configure options --{enable,disable}-libpmem to control
> whether QEMU is compiled with PMDK libpmem [1].
>
> QEMU may write to the host persistent memory (e.g. in vNVDIMM label
> emulation and live migration), so it must take the proper operations
> to ensure the persistence of its own writes. Depending on the CPU
> models and available instructions, the optimal operation can vary [2].
> PMDK libpmem have already implemented those operations on multiple CPU
> models (x86 and ARM) and the logic to select the optimal ones, so QEMU
> can just use libpmem rather than re-implement them.
>
> Libpem is a part of PMDK project(formerly known as NMVL).
> The project's home page is: http://pmem.io/pmdk/
> And the project's repository is: https://github.com/pmem/pmdk/
>
> For more information about libpmem APIs, you can refer to the comments
> in source code of: pmdk/src/libpmem/pmem.c, begin at line 33.
>
> Signed-off-by: Junyan He <junyan.he@intel.com>
> Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
> Reviewed-by: Igor Mammedov <imammedo@redhat.com>
> ---
> configure | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
next prev parent reply other threads:[~2018-07-17 16:05 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-17 6:32 [Qemu-devel] [PATCH 0/7 V10] nvdimm: guarantee persistence of QEMU writes to persistent memory junyan.he
2018-07-17 6:32 ` [Qemu-devel] [PATCH 1/7 V10] memory, exec: Expose all memory block related flags junyan.he
2018-07-17 15:58 ` Richard Henderson
2018-07-17 6:32 ` [Qemu-devel] [PATCH 2/7 V10] memory, exec: switch file ram allocation functions to 'flags' parameters junyan.he
2018-07-17 16:02 ` Richard Henderson
2018-07-18 5:34 ` He, Junyan
2018-07-17 6:32 ` [Qemu-devel] [PATCH 3/7 V10] configure: add libpmem support junyan.he
2018-07-17 16:05 ` Richard Henderson [this message]
2018-07-17 6:32 ` [Qemu-devel] [PATCH 4/7 V10] hostmem-file: add the 'pmem' option junyan.he
2018-07-17 16:46 ` Richard Henderson
2018-07-17 6:32 ` [Qemu-devel] [PATCH 5/7 V10] mem/nvdimm: ensure write persistence to PMEM in label emulation junyan.he
2018-07-17 17:00 ` Richard Henderson
2018-07-17 6:32 ` [Qemu-devel] [PATCH 6/7 V10] migration/ram: Add check and info message to nvdimm post copy junyan.he
2018-07-17 6:32 ` [Qemu-devel] [PATCH 7/7 V10] migration/ram: ensure write persistence on loading all data to PMEM junyan.he
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