>-----Original Message----- >From: Huang, Ying >Sent: Tuesday, January 15, 2008 1:49 AM >To: Ingo Molnar; Pallipadi, Venkatesh >Cc: [EMAIL PROTECTED]; H. Peter Anvin; Thomas >Gleixner; Ingo Molnar; Andi Kleen; linux-kernel@vger.kernel.org >Subject: Re: [PATCH -mm 0/3] i386 boot: replace boot_ioremap >with enhancedbt_ioremap > >On Tue, 2008-01-15 at 09:44 +0100, Ingo Molnar wrote: >> * Huang, Ying <[EMAIL PROTECTED]> wrote: >> >> > This patchset replaces boot_ioremap with a enhanced version of >> > bt_ioremap and renames the bt_ioremap to early_ioremap. >This reduces >> > 12k from .init.data segment and increases the size of >memory that can >> > be re-mapped before paging_init to 64k. >> >> in latest x86.git#mm there's an early_ioremap() introduced >as part of >> the PAT series - available on both 32-bit and 64-bit. Could >you take a >> look at it and use that if it's OK for your purposes? > >After checking the early_ioremap() implementation in >arch/x86/kernel/setup_32.c, I found that it is a duplication of >bt_ioremap() implementation in arch/x86/mm/ioremap_32.c. Both >implementations use set_fixmap(), so they can be used only after >paging_init(). > >The early_ioremap implementation provided in this patchset works as >follow: > >- Enhances bt_ioremap, make it usable before paging_init() via a >dedicated PTE page. >- Rename bt_ioremap to early_ioremap > >So I think maybe we should replace the early_ioremap() >implementation in >PAT series with that of this series. >
Agreed. PAT can use this for early mappings. Thanks for the patches :) -Venki -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
