From: Christoph Hellwig <hch@lst.de>
To: Ming Lei <ming.lei@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
Satya Tangirala <satyat@google.com>,
Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>,
John Stultz <john.stultz@linaro.org>,
linux-block@vger.kernel.org
Subject: Re: [PATCH 4/4] block: memory allocations in bounce_clone_bio must not fail
Date: Wed, 24 Feb 2021 17:12:36 +0100 [thread overview]
Message-ID: <20210224161236.GA9127@lst.de> (raw)
In-Reply-To: <YDY2WPtSLmvNt0W2@T590>
On Wed, Feb 24, 2021 at 07:19:52PM +0800, Ming Lei wrote:
> > if (bio_is_passthrough(bio_src))
> > - bio = bio_kmalloc(GFP_NOIO, bio_segments(bio_src));
> > + bio = bio_kmalloc(GFP_NOIO | __GFP_NOFAIL,
> > + bio_segments(bio_src));
>
> bio_kmalloc() still may fail if bio_segments(bio_src) is > UIO_MAXIOV.
Yes, but bio_kmalloc is what is used to allocate the passthrough
requests to start with, so we'd not even make it here.
next prev parent reply other threads:[~2021-02-24 16:16 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-24 7:24 bio_kmalloc related fixes for 5.12 Christoph Hellwig
2021-02-24 7:24 ` [PATCH 1/4] block-crypto-fallback: use a bio_set for splitting bios Christoph Hellwig
2021-02-24 16:17 ` Satya Tangirala
2021-02-24 23:23 ` Eric Biggers
2021-02-24 7:24 ` [PATCH 2/4] block: fix bounce_clone_bio for passthrough bios Christoph Hellwig
2021-02-24 20:30 ` Chaitanya Kulkarni
2021-02-24 7:24 ` [PATCH 3/4] block: remove the gfp_mask argument to bounce_clone_bio Christoph Hellwig
2021-02-24 20:30 ` Chaitanya Kulkarni
2021-02-24 7:24 ` [PATCH 4/4] block: memory allocations in bounce_clone_bio must not fail Christoph Hellwig
2021-02-24 11:19 ` Ming Lei
2021-02-24 16:12 ` Christoph Hellwig [this message]
2021-02-25 2:21 ` Ming Lei
2021-02-24 20:32 ` Chaitanya Kulkarni
2021-02-24 15:55 ` bio_kmalloc related fixes for 5.12 Jens Axboe
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