From: Peter Zijlstra <peterz@infradead.org>
To: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Cc: linux-mm@kvack.org, linux-snps-arc@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
Arnd Bergmann <arnd@arndb.de>, Will Deacon <will@kernel.org>,
"Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Nick Piggin <npiggin@gmail.com>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>
Subject: Re: [PATCH 0/3] eldie generated code for folded p4d/pud
Date: Thu, 10 Oct 2019 09:29:52 +0200 [thread overview]
Message-ID: <20191010072952.GM2311@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20191009222658.961-1-vgupta@synopsys.com>
On Wed, Oct 09, 2019 at 03:26:55PM -0700, Vineet Gupta wrote:
> Hi,
>
> This series elides extraneous generate code for folded p4d/pud.
> This came up when trying to remove __ARCH_USE_5LEVEL_HACK from ARC port.
> The code saving are not a while lot, but still worthwhile IMHO.
>
> bloat-o-meter2 vmlinux-A-baseline vmlinux-E-elide-p?d_clear_bad
> add/remove: 0/2 grow/shrink: 0/1 up/down: 0/-146 (-146)
> function old new delta
> p4d_clear_bad 2 - -2
> pud_clear_bad 20 - -20
> free_pgd_range 546 422 -124
> Total: Before=4137148, After=4137002, chg -1.000000%
>
Works for me, thanks!
next prev parent reply other threads:[~2019-10-10 7:38 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-09 22:26 [PATCH 0/3] eldie generated code for folded p4d/pud Vineet Gupta
2019-10-09 22:26 ` [PATCH 1/3] asm-generic/tlb: stub out pud_free_tlb() if __PAGETABLE_PUD_FOLDED Vineet Gupta
2019-10-09 22:26 ` [PATCH 2/3] asm-generic/tlb: stub out p4d_free_tlb() if __PAGETABLE_P4D_FOLDED Vineet Gupta
2019-10-09 22:26 ` [PATCH 3/3] asm-generic/mm: stub out p{4,d}d_clear_bad() if __PAGETABLE_P{4,u}D_FOLDED Vineet Gupta
2019-10-10 7:29 ` Peter Zijlstra [this message]
2019-10-10 8:56 ` [PATCH 0/3] eldie generated code for folded p4d/pud Kirill A. Shutemov
2019-10-10 20:05 ` Vineet Gupta
2019-10-11 12:19 ` Kirill A. Shutemov
2019-10-11 22:38 ` [RFC] asm-generic/tlb: stub out pmd_free_tlb() if __PAGETABLE_PMD_FOLDED Vineet Gupta
2019-10-14 17:41 ` Linus Torvalds
2019-10-14 18:02 ` Vineet Gupta
2019-10-14 18:25 ` Linus Torvalds
2019-10-14 19:08 ` Vineet Gupta
2019-10-14 20:38 ` Linus Torvalds
2019-10-14 21:48 ` Matthew Wilcox
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