From: Alexandre Ghiti <alex@ghiti.fr> To: Andrew Morton <akpm@linux-foundation.org> Cc: "James E . J . Bottomley" <James.Bottomley@HansenPartnership.com>, Helge Deller <deller@gmx.de>, Heiko Carstens <heiko.carstens@de.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>, Christian Borntraeger <borntraeger@de.ibm.com>, Yoshinori Sato <ysato@users.sourceforge.jp>, Rich Felker <dalias@libc.org>, "David S . Miller" <davem@davemloft.net>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, "H . Peter Anvin" <hpa@zytor.com>, x86@kernel.org, Dave Hansen <dave.hansen@linux.intel.com>, Andy Lutomirski <luto@kernel.org>, Peter Zijlstra <peterz@infradead.org>, linux-parisc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-mm@kvack.org, Alexandre Ghiti <alex@ghiti.fr> Subject: [PATCH RESEND 0/8] Fix mmap base in bottom-up mmap Date: Wed, 19 Jun 2019 05:38:58 +0000 [thread overview] Message-ID: <20190619053906.5900-1-alex@ghiti.fr> (raw) (Sorry for the previous interrupted series) This series fixes the fallback of the top-down mmap: in case of failure, a bottom-up scheme can be tried as a last resort between the top-down mmap base and the stack, hoping for a large unused stack limit. Lots of architectures and even mm code start this fallback at TASK_UNMAPPED_BASE, which is useless since the top-down scheme already failed on the whole address space: instead, simply use mmap_base. Along the way, it allows to get rid of of mmap_legacy_base and mmap_compat_legacy_base from mm_struct. Note that arm and mips already implement this behaviour. Alexandre Ghiti (8): s390: Start fallback of top-down mmap at mm->mmap_base sh: Start fallback of top-down mmap at mm->mmap_base sparc: Start fallback of top-down mmap at mm->mmap_base x86, hugetlbpage: Start fallback of top-down mmap at mm->mmap_base mm: Start fallback top-down mmap at mm->mmap_base parisc: Use mmap_base, not mmap_legacy_base, as low_limit for bottom-up mmap x86: Use mmap_*base, not mmap_*legacy_base, as low_limit for bottom-up mmap mm: Remove mmap_legacy_base and mmap_compat_legacy_code fields from mm_struct arch/parisc/kernel/sys_parisc.c | 8 +++----- arch/s390/mm/mmap.c | 2 +- arch/sh/mm/mmap.c | 2 +- arch/sparc/kernel/sys_sparc_64.c | 2 +- arch/sparc/mm/hugetlbpage.c | 2 +- arch/x86/include/asm/elf.h | 2 +- arch/x86/kernel/sys_x86_64.c | 4 ++-- arch/x86/mm/hugetlbpage.c | 7 ++++--- arch/x86/mm/mmap.c | 20 +++++++++----------- include/linux/mm_types.h | 2 -- mm/debug.c | 4 ++-- mm/mmap.c | 2 +- 12 files changed, 26 insertions(+), 31 deletions(-) -- 2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Alexandre Ghiti <alex@ghiti.fr> To: Andrew Morton <akpm@linux-foundation.org> Cc: "James E . J . Bottomley" <James.Bottomley@HansenPartnership.com>, Helge Deller <deller@gmx.de>, Heiko Carstens <heiko.carstens@de.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>, Christian Borntraeger <borntraeger@de.ibm.com>, Yoshinori Sato <ysato@users.sourceforge.jp>, Rich Felker <dalias@libc.org>, "David S . Miller" <davem@davemloft.net>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>, "H . Peter Anvin" <hpa@zytor.com>, x86@kernel.org, Dave Hansen <dave.hansen@linux.intel.com>, Andy Lutomirski <luto@kernel.org>, Peter Zijlstra <peterz@infradead.org>, linux-parisc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-mm@kvack.org, Alexandre Ghiti <alex@ghiti.fr> Subject: [PATCH RESEND 0/8] Fix mmap base in bottom-up mmap Date: Wed, 19 Jun 2019 01:38:58 -0400 [thread overview] Message-ID: <20190619053906.5900-1-alex@ghiti.fr> (raw) (Sorry for the previous interrupted series) This series fixes the fallback of the top-down mmap: in case of failure, a bottom-up scheme can be tried as a last resort between the top-down mmap base and the stack, hoping for a large unused stack limit. Lots of architectures and even mm code start this fallback at TASK_UNMAPPED_BASE, which is useless since the top-down scheme already failed on the whole address space: instead, simply use mmap_base. Along the way, it allows to get rid of of mmap_legacy_base and mmap_compat_legacy_base from mm_struct. Note that arm and mips already implement this behaviour. Alexandre Ghiti (8): s390: Start fallback of top-down mmap at mm->mmap_base sh: Start fallback of top-down mmap at mm->mmap_base sparc: Start fallback of top-down mmap at mm->mmap_base x86, hugetlbpage: Start fallback of top-down mmap at mm->mmap_base mm: Start fallback top-down mmap at mm->mmap_base parisc: Use mmap_base, not mmap_legacy_base, as low_limit for bottom-up mmap x86: Use mmap_*base, not mmap_*legacy_base, as low_limit for bottom-up mmap mm: Remove mmap_legacy_base and mmap_compat_legacy_code fields from mm_struct arch/parisc/kernel/sys_parisc.c | 8 +++----- arch/s390/mm/mmap.c | 2 +- arch/sh/mm/mmap.c | 2 +- arch/sparc/kernel/sys_sparc_64.c | 2 +- arch/sparc/mm/hugetlbpage.c | 2 +- arch/x86/include/asm/elf.h | 2 +- arch/x86/kernel/sys_x86_64.c | 4 ++-- arch/x86/mm/hugetlbpage.c | 7 ++++--- arch/x86/mm/mmap.c | 20 +++++++++----------- include/linux/mm_types.h | 2 -- mm/debug.c | 4 ++-- mm/mmap.c | 2 +- 12 files changed, 26 insertions(+), 31 deletions(-) -- 2.20.1
next reply other threads:[~2019-06-19 5:38 UTC|newest] Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-06-19 5:38 Alexandre Ghiti [this message] 2019-06-19 5:38 ` [PATCH RESEND 0/8] Fix mmap base in bottom-up mmap Alexandre Ghiti 2019-06-19 5:42 ` Alexandre Ghiti 2019-06-19 5:42 ` Alexandre Ghiti 2019-06-19 5:42 ` [PATCH RESEND 1/8] s390: Start fallback of top-down mmap at mm->mmap_base Alexandre Ghiti 2019-06-19 5:42 ` Alexandre Ghiti 2019-06-19 5:54 ` Alex Ghiti 2019-06-19 5:54 ` Alex Ghiti 2019-06-20 5:03 ` [PATCH RESEND 0/8] Fix mmap base in bottom-up mmap Alexandre Ghiti 2019-06-20 5:03 ` Alexandre Ghiti 2019-06-20 5:03 ` [PATCH RESEND 1/8] s390: Start fallback of top-down mmap at mm->mmap_base Alexandre Ghiti 2019-06-20 5:03 ` Alexandre Ghiti 2019-06-20 5:03 ` [PATCH RESEND 2/8] sh: " Alexandre Ghiti 2019-06-20 5:03 ` Alexandre Ghiti 2019-06-20 5:03 ` [PATCH RESEND 3/8] sparc: " Alexandre Ghiti 2019-06-20 5:03 ` Alexandre Ghiti 2019-06-20 5:03 ` [PATCH RESEND 4/8] x86, hugetlbpage: " Alexandre Ghiti 2019-06-20 5:03 ` Alexandre Ghiti 2019-06-20 5:03 ` [PATCH RESEND 5/8] mm: Start fallback " Alexandre Ghiti 2019-06-20 5:03 ` Alexandre Ghiti 2019-06-20 5:03 ` [PATCH RESEND 6/8] parisc: Use mmap_base, not mmap_legacy_base, as low_limit for bottom-up mmap Alexandre Ghiti 2019-06-20 5:03 ` Alexandre Ghiti 2019-06-25 14:09 ` Helge Deller 2019-06-25 14:09 ` Helge Deller 2019-06-26 5:20 ` Alex Ghiti 2019-06-26 5:20 ` Alex Ghiti 2019-06-20 5:03 ` [PATCH RESEND 7/8] x86: Use mmap_*base, not mmap_*legacy_base, " Alexandre Ghiti 2019-06-20 5:03 ` Alexandre Ghiti 2019-06-20 5:03 ` [PATCH RESEND 8/8] mm: Remove mmap_legacy_base and mmap_compat_legacy_code fields from mm_struct Alexandre Ghiti 2019-06-20 5:03 ` Alexandre Ghiti 2019-07-30 6:12 ` [PATCH RESEND 0/8] Fix mmap base in bottom-up mmap Alexandre Ghiti 2019-07-30 6:12 ` Alexandre Ghiti 2019-08-26 7:34 ` Alexandre Ghiti 2019-08-26 7:34 ` Alexandre Ghiti 2019-08-26 22:37 ` Helge Deller 2019-08-26 22:37 ` Helge Deller 2019-08-28 4:53 ` Alex Ghiti 2019-08-28 4:53 ` Alex Ghiti
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