From: Jarkko Sakkinen <jarkko@kernel.org>
To: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Sean Christopherson <seanjc@google.com>,
Shuah Khan <shuah@kernel.org>,
x86@kernel.org, linux-sgx@vger.kernel.org,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
Jia Zhang <zhang.jia@linux.alibaba.com>
Subject: Re: [PATCH v3 2/5] x86/sgx: Optimize the locking range in sgx_sanitize_section()
Date: Sat, 30 Jan 2021 15:24:49 +0200 [thread overview]
Message-ID: <YBVeIb+o2VGzEurU@kernel.org> (raw)
In-Reply-To: <20210124062907.88229-3-tianjia.zhang@linux.alibaba.com>
On Sun, Jan 24, 2021 at 02:29:04PM +0800, Tianjia Zhang wrote:
> The spin lock of sgx_epc_section only locks the page_list. The
> EREMOVE operation and init_laundry_list is not necessary in the
> protection range of the spin lock. This patch reduces the lock
> range of the spin lock in the function sgx_sanitize_section()
> and only protects the operation of the page_list.
>
> Suggested-by: Sean Christopherson <seanjc@google.com>
> Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
I prefer to use the word "optimize" only if there is supporting
data to show that the code change has significant value.
/Jarkko
next prev parent reply other threads:[~2021-01-30 13:26 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-24 6:29 [PATCH v3 0/5] Some optimizations related to sgx Tianjia Zhang
2021-01-24 6:29 ` [PATCH v3 1/5] selftests/x86: Simplify the code to get vdso base address in sgx Tianjia Zhang
2021-01-24 6:29 ` [PATCH v3 2/5] x86/sgx: Optimize the locking range in sgx_sanitize_section() Tianjia Zhang
2021-01-30 13:24 ` Jarkko Sakkinen [this message]
2021-01-24 6:29 ` [PATCH v3 3/5] x86/sgx: Optimize the free_cnt count in sgx_epc_section Tianjia Zhang
2021-01-27 17:40 ` Jarkko Sakkinen
2021-02-11 6:04 ` Tianjia Zhang
2021-02-12 12:19 ` Jarkko Sakkinen
2021-02-16 3:30 ` Tianjia Zhang
2021-01-24 6:29 ` [PATCH v3 4/5] x86/sgx: Allows ioctl PROVISION to execute before CREATE Tianjia Zhang
2021-01-30 13:26 ` Jarkko Sakkinen
2021-02-01 12:55 ` Tianjia Zhang
2021-01-24 6:29 ` [PATCH v3 5/5] x86/sgx: Remove redundant if conditions in sgx_encl_create Tianjia Zhang
2021-01-24 8:20 ` Greg KH
2021-01-25 18:46 ` Sean Christopherson
2021-01-30 14:33 ` Jarkko Sakkinen
2021-02-01 12:37 ` Tianjia Zhang
2021-01-25 17:22 ` [PATCH v3 0/5] Some optimizations related to sgx Jarkko Sakkinen
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