From: Segher Boessenkool <segher@kernel.crashing.org>
To: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Paul Mackerras <paulus@samba.org>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] powerpc/32s: Don't flush all TLBs when flushing one page
Date: Fri, 31 Jan 2020 09:51:50 -0600 [thread overview]
Message-ID: <20200131155150.GD22482@gate.crashing.org> (raw)
In-Reply-To: <e31c57eb5308a5a73a5c8232454c0dd9f65f6175.1580485014.git.christophe.leroy@c-s.fr>
On Fri, Jan 31, 2020 at 03:37:34PM +0000, Christophe Leroy wrote:
> When the range is a single page, do a page flush instead.
> + start &= PAGE_MASK;
> + end = (end - 1) | ~PAGE_MASK;
> if (!Hash) {
> - _tlbia();
> + if (end - start == PAGE_SIZE)
> + _tlbie(start);
> + else
> + _tlbia();
> return;
> }
For just one page, you get end - start == 0 actually?
Segher
next prev parent reply other threads:[~2020-01-31 15:53 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-31 15:37 [PATCH] powerpc/32s: Don't flush all TLBs when flushing one page Christophe Leroy
2020-01-31 15:51 ` Segher Boessenkool [this message]
2020-01-31 16:15 ` Christophe Leroy
2020-01-31 19:38 ` Segher Boessenkool
2020-02-01 7:27 ` Christophe Leroy
2020-02-01 14:06 ` Segher Boessenkool
2020-02-01 14:53 ` Christophe Leroy
2020-02-01 16:17 ` Segher Boessenkool
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