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From: "hch@lst.de" <hch@lst.de>
To: Atish Patra <Atish.Patra@wdc.com>
Cc: "linux-riscv@lists.infradead.org"
	<linux-riscv@lists.infradead.org>,
	"palmer@sifive.com" <palmer@sifive.com>,
	"hch@lst.de" <hch@lst.de>,
	"paul.walmsley@sifive.com" <paul.walmsley@sifive.com>
Subject: Re: [PATCH 5/8] riscv: actually clear icache_stale_mask for all harts in mm_cpumask
Date: Mon, 26 Aug 2019 13:41:23 +0200	[thread overview]
Message-ID: <20190826114123.GF15002@lst.de> (raw)
In-Reply-To: <53f59546a691888c07bfb16780c6d5550b4be4fe.camel@wdc.com>

On Thu, Aug 22, 2019 at 06:29:35PM +0000, Atish Patra wrote:
> I guess you have added cpu_possible_mask keeping cpu hotplug in mind
> for future.
> 
> I think it should be cpu_present_mask instead of cpu_possible_mask as
> they can be different in case where some cpus are just waiting in the
> boot loader.

I don't think it matters.  The only place where we actually check
icache_stale_mask is in flush_icache_deferred, which only does
a cpumask_test_cpu for the currently running CPU.  So I'd rather
opt for setting a few more bits and prepare for cpu hotplug.

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  reply	other threads:[~2019-08-26 11:41 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-22  6:56 sys_riscv_flush_icache Christoph Hellwig
2019-08-22  6:56 ` [PATCH 1/8] riscv: fix the flags argument type for riscv_riscv_flush_icache Christoph Hellwig
2019-08-22  6:56 ` [PATCH 2/8] riscv: remove SYS_RISCV_FLUSH_ICACHE_LOCAL #define Christoph Hellwig
2019-08-22  6:56 ` [PATCH 3/8] riscv: move sys_riscv_flush_icache to cacheflush.c Christoph Hellwig
2019-08-22  6:56 ` [PATCH 4/8] riscv: remove the active_mm check in sys_riscv_flush_icache Christoph Hellwig
2019-08-22  6:56 ` [PATCH 5/8] riscv: actually clear icache_stale_mask for all harts in mm_cpumask Christoph Hellwig
2019-08-22 18:29   ` Atish Patra
2019-08-26 11:41     ` hch [this message]
2019-08-22  6:56 ` [PATCH 6/8] riscv: use get_cpu and put_cpu in sys_riscv_flush_icache Christoph Hellwig
2019-08-22 17:49   ` Atish Patra
2019-08-26 11:38     ` hch
2019-08-27 18:42       ` Atish Patra
2019-08-22  6:56 ` [PATCH 7/8] riscv: improve the local flushing logic " Christoph Hellwig
2019-08-22 17:34   ` Atish Patra
2019-08-26 11:36     ` hch
2019-08-22  6:56 ` [PATCH 8/8] riscv: ignore the SYS_RISCV_FLUSH_ICACHE_LOCAL flag Christoph Hellwig
2019-08-28  1:10   ` Palmer Dabbelt
2019-08-28  6:09     ` Christoph Hellwig
2019-09-03 18:46       ` Palmer Dabbelt
2019-09-06 17:07         ` Christoph Hellwig
2019-09-13 19:44           ` Palmer Dabbelt

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