From: Christoph Hellwig <hch@infradead.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@infradead.org>,
Damien Le Moal <dlemoal@kernel.org>,
linux-block@vger.kernel.org, dm-devel@lists.linux.dev,
Mike Snitzer <snitzer@redhat.com>
Subject: Re: [PATCH 02/13] block: Exclude conventional zones when faking max open limit
Date: Tue, 30 Apr 2024 21:57:29 -0700 [thread overview]
Message-ID: <ZjHLubxsEVqq4Qgy@infradead.org> (raw)
In-Reply-To: <4c54e3c8-83ed-46dd-b437-2f01ab1cb866@kernel.dk>
On Tue, Apr 30, 2024 at 01:04:51PM -0600, Jens Axboe wrote:
> On 4/30/24 9:24 AM, Christoph Hellwig wrote:
> > On Tue, Apr 30, 2024 at 09:51:20PM +0900, Damien Le Moal wrote:
> >> + /* Resize the zone write plug memory pool if needed. */
> >> + if (disk->zone_wplugs_pool->min_nr != pool_size)
> >> + mempool_resize(disk->zone_wplugs_pool, pool_size);
> >
> > No need for the if here, mempool_resize is a no-op if called for
> > the current value.
>
> Still cheaper than the function call though, so I think that's
> the right way to do it.
It is only called during device probing and resize. Try to avoid
the call and spinlock there is the poster definition of premature
micro-optimization..
next prev parent reply other threads:[~2024-05-01 4:57 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-30 12:51 [PATCH 00/13] Zone write plugging fixes and cleanup Damien Le Moal
2024-04-30 12:51 ` [PATCH 01/13] dm: Check that a zoned table leads to a valid mapped device Damien Le Moal
2024-04-30 12:51 ` [PATCH 02/13] block: Exclude conventional zones when faking max open limit Damien Le Moal
2024-04-30 15:24 ` Christoph Hellwig
2024-04-30 19:04 ` Jens Axboe
2024-05-01 4:57 ` Christoph Hellwig [this message]
2024-04-30 12:51 ` [PATCH 03/13] block: Fix zone write plug initialization from blk_revalidate_zone_cb() Damien Le Moal
2024-04-30 15:26 ` Christoph Hellwig
2024-04-30 22:50 ` Damien Le Moal
2024-04-30 23:54 ` Damien Le Moal
2024-04-30 12:51 ` [PATCH 04/13] block: Fix reference counting for zone write plugs in error state Damien Le Moal
2024-04-30 15:28 ` Christoph Hellwig
2024-04-30 12:51 ` [PATCH 05/13] block: Hold a reference on zone write plugs to schedule submission Damien Le Moal
2024-04-30 15:30 ` Christoph Hellwig
2024-04-30 12:51 ` [PATCH 06/13] block: Unhash a zone write plug only if needed Damien Le Moal
2024-04-30 15:31 ` Christoph Hellwig
2024-04-30 12:51 ` [PATCH 07/13] block: Do not remove zone write plugs still in use Damien Le Moal
2024-04-30 15:34 ` Christoph Hellwig
2024-04-30 23:06 ` Damien Le Moal
2024-04-30 23:55 ` Damien Le Moal
2024-04-30 12:51 ` [PATCH 08/13] block: Fix flush request sector restore Damien Le Moal
2024-04-30 15:26 ` Christoph Hellwig
2024-04-30 12:51 ` [PATCH 09/13] block: Fix handling of non-empty flush write requests to zones Damien Le Moal
2024-04-30 15:34 ` Christoph Hellwig
2024-04-30 12:51 ` [PATCH 10/13] block: Improve blk_zone_write_plug_bio_merged() Damien Le Moal
2024-04-30 15:35 ` Christoph Hellwig
2024-04-30 12:51 ` [PATCH 11/13] block: Improve zone write request completion handling Damien Le Moal
2024-04-30 15:39 ` Christoph Hellwig
2024-04-30 12:51 ` [PATCH 12/13] block: Simplify blk_zone_write_plug_bio_endio() Damien Le Moal
2024-04-30 15:36 ` Christoph Hellwig
2024-04-30 12:51 ` [PATCH 13/13] block: Simplify zone write plug BIO abort Damien Le Moal
2024-04-30 15:36 ` Christoph Hellwig
2024-04-30 17:00 ` [PATCH 00/13] Zone write plugging fixes and cleanup Johannes Thumshirn
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