From: David Miller <davem@davemloft.net>
To: tkhai@yandex.ru
Cc: allen.pais@oracle.com, linux-rt-users@vger.kernel.org,
sparclinux@vger.kernel.org, bigeasy@linutronix.de
Subject: Re: [PATCH 3/4] sparc64: convert spinlock_t to raw_spinlock_t in mmu_context_t
Date: Tue, 04 Mar 2014 14:59:23 -0500 (EST) [thread overview]
Message-ID: <20140304.145923.1615081983757728942.davem@davemloft.net> (raw)
In-Reply-To: <341861392205386@web5h.yandex.ru>
From: Kirill Tkhai <tkhai@yandex.ru>
Date: Wed, 12 Feb 2014 15:43:06 +0400
> For example, collect only batches which does not require smp call function. Or the
> main goal of lazy tlb was to prevent smp calls?! It's good to discover this..
The goal of the lazy tlb stuff is to only have one (potential)
synchronization point with other cpus.
Then we sweep away the TSB entries, after which any TLB miss must
enter the full fault path and synchronize with the current thread
doing the flush.
Then we kill the TLB entries, both local and remote.
The tsb_grow() code path is quite the animal, as any of you who have
read the comment above it's implementation can attest :-) It took 6
months to get that code right in a non-RT context back when it was
originally written.
next prev parent reply other threads:[~2014-03-04 19:59 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1388980510-10190-1-git-send-email-allen.pais@oracle.com>
2014-02-05 3:31 ` [PATCH 0/4] PREEMPT_RT support for sparc64 Allen Pais
2014-02-05 8:28 ` Sebastian Andrzej Siewior
2014-02-05 10:38 ` Allen Pais
2014-02-05 10:43 ` Sebastian Andrzej Siewior
2014-02-05 10:51 ` Allen Pais
[not found] ` <1388980510-10190-4-git-send-email-allen.pais@oracle.com>
[not found] ` <341392153219@web17g.yandex.ru>
2014-02-12 7:48 ` [PATCH 3/4] sparc64: convert spinlock_t to raw_spinlock_t in mmu_context_t Allen Pais
2014-02-12 8:33 ` Kirill Tkhai
2014-02-12 11:28 ` Allen Pais
2014-02-12 11:43 ` Kirill Tkhai
2014-02-12 12:14 ` Allen Pais
2014-02-12 12:45 ` Kirill Tkhai
2014-02-12 13:05 ` Allen Pais
2014-02-19 3:53 ` Allen Pais
2014-02-19 8:09 ` Kirill Tkhai
2014-02-19 8:12 ` Allen Pais
2014-02-19 8:57 ` Kirill Tkhai
2014-02-19 8:59 ` Allen Pais
2014-02-19 9:13 ` Allen Pais
2014-02-19 9:25 ` Kirill Tkhai
2014-02-19 9:31 ` Allen Pais
2014-02-26 7:51 ` Allen Pais
2014-02-28 14:51 ` Kirill Tkhai
2014-03-04 19:10 ` David Miller
2014-03-04 20:28 ` David Miller
2014-03-05 4:30 ` Allen Pais
2014-03-06 21:36 ` David Miller
2014-03-07 14:05 ` Sebastian Andrzej Siewior
2014-03-04 20:39 ` Kirill Tkhai
2014-03-07 13:41 ` Sebastian Andrzej Siewior
2014-03-04 20:03 ` David Miller
2014-03-04 21:26 ` Kirill Tkhai
2014-03-04 20:01 ` David Miller
2014-03-05 4:34 ` Allen Pais
2014-03-05 4:52 ` David Miller
2014-03-04 19:59 ` David Miller [this message]
2014-03-04 19:55 ` David Miller
2014-03-04 20:44 ` Kirill Tkhai
2014-03-07 14:29 ` Sebastian Andrzej Siewior
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