From: Christoph Hellwig <hch@infradead.org>
To: "Joel Fernandes (Google)" <joel@joelfernandes.org>
Cc: linux-mips@linux-mips.org, Rich Felker <dalias@libc.org>,
linux-ia64@vger.kernel.org, linux-sh@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Will Deacon <will.deacon@arm.com>,
mhocko@kernel.org, linux-mm@kvack.org, lokeshgidra@google.com,
sparclinux@vger.kernel.org, linux-riscv@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, Jonas Bonn <jonas@southpole.se>,
linux-s390@vger.kernel.org, dancol@google.com,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Max Filippov <jcmvbkbc@gmail.com>,
linux-hexagon@vger.kernel.org, Helge Deller <deller@gmx.de>,
"maintainer:X86 ARCHITECTURE 32-BIT AND 64-BIT" <x86@kernel.org>,
hughd@google.com, "James E.J. Bottomley" <jejb@parisc-linux.org>,
kasan-dev@googlegroups.com, elfring@users.sourceforge.net,
Ingo Molnar <mingo@redhat.com>,
Geert Uytter
Subject: Re: [PATCH 2/4] mm: speed up mremap by 500x on large regions (v2)
Date: Mon, 15 Oct 2018 02:42:09 -0700 [thread overview]
Message-ID: <20181015094209.GA31999@infradead.org> (raw)
In-Reply-To: <20181013013200.206928-3-joel@joelfernandes.org>
On Fri, Oct 12, 2018 at 06:31:58PM -0700, Joel Fernandes (Google) wrote:
> Android needs to mremap large regions of memory during memory management
> related operations.
Just curious: why?
> + if ((old_addr & ~PMD_MASK) || (new_addr & ~PMD_MASK)
> + || old_end - old_addr < PMD_SIZE)
The || goes on the first line.
> + } else if (extent == PMD_SIZE && IS_ENABLED(CONFIG_HAVE_MOVE_PMD)) {
Overly long line.
next prev parent reply other threads:[~2018-10-15 9:42 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-13 1:31 [PATCH 0/4] Add support for fast mremap Joel Fernandes (Google)
2018-10-13 1:31 ` [PATCH 1/4] treewide: remove unused address argument from pte_alloc functions (v2) Joel Fernandes (Google)
2018-10-24 8:37 ` Peter Zijlstra
2018-10-25 2:21 ` Joel Fernandes
2018-10-26 8:52 ` Peter Zijlstra
2018-10-25 10:47 ` Kirill A. Shutemov
2018-10-26 8:50 ` Peter Zijlstra
2018-10-13 1:31 ` [PATCH 2/4] mm: speed up mremap by 500x on large regions (v2) Joel Fernandes (Google)
2018-10-15 9:42 ` Christoph Hellwig [this message]
2018-10-15 22:33 ` Joel Fernandes
2018-10-16 11:29 ` Vlastimil Babka
2018-10-16 19:43 ` Joel Fernandes
2018-10-17 7:38 ` Vlastimil Babka
2018-10-24 10:12 ` Kirill A. Shutemov
2018-10-24 11:57 ` Balbir Singh
2018-10-24 12:57 ` Kirill A. Shutemov
2018-10-25 2:09 ` Joel Fernandes
2018-10-25 10:19 ` Kirill A. Shutemov
2018-10-26 21:11 ` Joel Fernandes
2018-10-29 10:28 ` Will Deacon
2018-10-25 2:13 ` Joel Fernandes
2018-10-27 10:21 ` Balbir Singh
2018-10-27 19:39 ` Joel Fernandes
2018-10-28 22:40 ` Balbir Singh
2018-10-13 1:31 ` [PATCH 3/4] arm64: select HAVE_MOVE_PMD for faster mremap (v1) Joel Fernandes (Google)
2018-10-13 1:32 ` [PATCH 4/4] x86: " Joel Fernandes (Google)
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