linux-kernel - Re: TLB flush question (x86

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Message-ID: <20110917191221.GA24295@rhlx01.hs-esslingen.de>
Date:	Sat, 17 Sep 2011 21:12:21 +0200
From:	Andreas Mohr <andi@...as.de>
To:	Arkaprava Basu <arkaprava.basu@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: TLB flush question (x86_64)

Hi,

decided to reply since there hasn't been any activity yet.

> Is there any particular reason why
> the entire address space is flushed from the tlb while only a range of
> virtual address space was supposedly required to be flushed?

While this particular function has actually changed in less medieval
kernel versions, it would be nice if someone knew an answer to that,
especially since TLB activity may have grave performance implications.

Andreas Mohr
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