From: Christoph Hellwig <[email protected]>
To: Pavel Begunkov <[email protected]>
Cc: Jens Axboe <[email protected]>,
[email protected], [email protected],
[email protected], [email protected]
Subject: Re: [RFC for-next v2 3/4] block/bio: add pcpu caching for non-polling bio_put
Date: Thu, 20 Oct 2022 01:31:43 -0700 [thread overview]
Message-ID: <[email protected]> (raw)
In-Reply-To: <9fd04486d972c1f3ef273fa26b4b6bf51a5e4270.1666122465.git.asml.silence@gmail.com>
> + unsigned long flags;
>
> cache = per_cpu_ptr(bio->bi_pool->cache, get_cpu());
> bio_uninit(bio);
> @@ -737,12 +776,15 @@ static inline void bio_put_percpu_cache(struct bio *bio)
> cache->free_list = bio;
> cache->nr++;
> } else {
> - put_cpu();
> - bio_free(bio);
> - return;
> + local_irq_save(flags);
> + bio->bi_next = cache->free_list_irq;
> + cache->free_list_irq = bio;
> + cache->nr_irq++;
> + local_irq_restore(flags);
> }
Ok, I guess with that my previous comments don't make quite
as much sense any more. I think youcan keep flags local in
the branch here, though.
next prev parent reply other threads:[~2022-10-20 8:31 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-18 19:50 [RFC for-next v2 0/4] enable pcpu bio caching for IRQ I/O Pavel Begunkov
2022-10-18 19:50 ` [RFC for-next v2 1/4] bio: safeguard REQ_ALLOC_CACHE bio put Pavel Begunkov
2022-10-20 8:26 ` Christoph Hellwig
2022-10-18 19:50 ` [RFC for-next v2 2/4] bio: split pcpu cache part of bio_put into a helper Pavel Begunkov
2022-10-20 8:30 ` Christoph Hellwig
2022-10-18 19:50 ` [RFC for-next v2 3/4] block/bio: add pcpu caching for non-polling bio_put Pavel Begunkov
2022-10-20 8:31 ` Christoph Hellwig [this message]
2022-10-20 12:26 ` Pavel Begunkov
2022-10-18 19:50 ` [RFC for-next v2 4/4] io_uring/rw: enable bio caches for IRQ rw Pavel Begunkov
2022-10-20 8:32 ` [RFC for-next v2 0/4] enable pcpu bio caching for IRQ I/O Christoph Hellwig
2022-10-20 12:40 ` Pavel Begunkov
2022-10-20 12:53 ` Jens Axboe
2022-10-20 12:50 ` (subset) " Jens Axboe
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