From: Stian Halseth <stian@itx.no>
To: Imre Kaloz <kaloz@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Andreas Larsson <andreas@gaisler.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
"Mike Rapoport (IBM)" <rppt@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH v3 0/4] sparc64: D-cache alias flushing fixes
Date: Thu, 22 Oct 2026 10:20:37 +0200 [thread overview]
Message-ID: <bfad4b87359161304015b04cc88f15cf07a055e5.camel@itx.no> (raw)
In-Reply-To: <cover.1792609488.git.kaloz@kernel.org>
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Hi Imre,
On Thu, 2026-10-22 at 01:33 +0200, Imre Kaloz wrote:
> These fix D-cache alias flushing on sparc64 CPUs with a virtually
> indexed L1 D-cache (Spitfire and Cheetah).
>
Tested on top of Andreas' for-next on my V240 (sun4u, 2xUltraSPARC
IIIi), against the same for-next without the series, both with THP
enabled. The stale reads through a reused vmalloc address are gone, and
moving an 8 MB THP to the other colour now takes milliseconds instead
of seven seconds.
I also checked 1/4 on its own by booting with the vmemmap check in 3/4
disabled. The four cross calls from sparse_init() still reach
xcall_deliver(), but physical address 0 is now left untouched.
4/4 can't really be tested on sparc64, since move_ptes() never
batches, but it builds and nothing changes. Each patch builds
cleanly for SMP and UP.
Tested-by: Stian Halseth <stian@itx.no> # Sun Fire V240
/Stian
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next prev parent reply other threads:[~2026-10-22 8:20 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-21 23:33 Imre Kaloz
2026-10-21 23:33 ` [PATCH v3 1/4] sparc64: skip the trap block in xcall_deliver() when there is no target Imre Kaloz
2026-10-21 23:33 ` [PATCH v3 2/4] sparc64: flush only the aliased page, not its whole folio Imre Kaloz
2026-10-21 23:33 ` [PATCH v3 3/4] sparc64: flush vmalloc ranges from the D-cache on map and unmap Imre Kaloz
2026-10-21 23:33 ` [PATCH v3 4/4] mm: pass the number of PTEs to move_pte() Imre Kaloz
2026-10-23 17:17 ` Pedro Falcato
2026-10-23 20:53 ` David Hildenbrand (Arm)
2026-10-22 8:20 ` Stian Halseth [this message]
2026-10-23 9:22 ` [PATCH v3 0/4] sparc64: D-cache alias flushing fixes Andreas Larsson
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