From: Christoph Hellwig <hch@infradead.org>
To: Sarthak Kukreti <sarthakkukreti@chromium.org>
Cc: dm-devel@redhat.com, linux-block@vger.kernel.org,
linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org,
Jens Axboe <axboe@kernel.dk>,
"Michael S . Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
Alasdair Kergon <agk@redhat.com>,
Mike Snitzer <snitzer@kernel.org>, Theodore Ts'o <tytso@mit.edu>,
Andreas Dilger <adilger.kernel@dilger.ca>,
Bart Van Assche <bvanassche@google.com>,
Daniil Lunev <dlunev@google.com>, Evan Green <evgreen@google.com>,
Gwendal Grignou <gwendal@google.com>
Subject: Re: [PATCH RFC 4/8] fs: Introduce FALLOC_FL_PROVISION
Date: Tue, 20 Sep 2022 00:49:13 -0700 [thread overview]
Message-ID: <YylweQAZkIdb5ixo@infradead.org> (raw)
In-Reply-To: <20220915164826.1396245-5-sarthakkukreti@google.com>
On Thu, Sep 15, 2022 at 09:48:22AM -0700, Sarthak Kukreti wrote:
> From: Sarthak Kukreti <sarthakkukreti@chromium.org>
>
> FALLOC_FL_PROVISION is a new fallocate() allocation mode that
> sends a hint to (supported) thinly provisioned block devices to
> allocate space for the given range of sectors via REQ_OP_PROVISION.
So, how does that "provisioning" actually work in todays world where
storage is usually doing out of place writes in one or more layers,
including the flash storage everyone is using. Does it give you one
write? And unlimited number? Some undecided number inbetween? How
is it affected by write zeroes to that range or a discard?
next prev parent reply other threads:[~2022-09-20 7:50 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-15 16:48 [PATCH RFC 0/8] Introduce provisioning primitives for thinly provisioned storage Sarthak Kukreti
2022-09-15 16:48 ` [PATCH RFC 1/8] block: Introduce provisioning primitives Sarthak Kukreti
2022-09-23 15:15 ` Mike Snitzer
2022-12-29 8:17 ` Sarthak Kukreti
2022-09-15 16:48 ` [PATCH RFC 2/8] dm: Add support for block provisioning Sarthak Kukreti
2022-09-23 14:23 ` Mike Snitzer
2022-12-29 8:22 ` Sarthak Kukreti
2022-09-15 16:48 ` [PATCH RFC 3/8] virtio_blk: Add support for provision requests Sarthak Kukreti
2022-09-16 5:48 ` Stefan Hajnoczi
2022-09-20 2:33 ` Sarthak Kukreti
2022-09-27 21:37 ` Michael S. Tsirkin
2022-09-15 16:48 ` [PATCH RFC 4/8] fs: Introduce FALLOC_FL_PROVISION Sarthak Kukreti
2022-09-16 11:56 ` Brian Foster
2022-09-16 21:02 ` Sarthak Kukreti
2022-09-21 15:39 ` Brian Foster
2022-09-22 8:04 ` Sarthak Kukreti
2022-09-22 18:29 ` Brian Foster
2022-12-29 8:13 ` Sarthak Kukreti
2022-09-20 7:49 ` Christoph Hellwig [this message]
2022-09-21 5:54 ` Sarthak Kukreti
2022-09-21 15:21 ` Mike Snitzer
2022-09-22 8:08 ` Sarthak Kukreti
2022-09-23 8:45 ` Christoph Hellwig
2022-12-29 8:14 ` Sarthak Kukreti
2022-09-15 16:48 ` [PATCH RFC 5/8] loop: Add support for provision requests Sarthak Kukreti
2022-09-15 16:48 ` [PATCH RFC 6/8] ext4: Add support for FALLOC_FL_PROVISION Sarthak Kukreti
2022-09-15 16:48 ` [PATCH RFC 7/8] ext4: Add mount option for provisioning blocks during allocations Sarthak Kukreti
2022-09-15 16:48 ` [PATCH RFC 8/8] ext4: Add a per-file provision override xattr Sarthak Kukreti
2022-09-16 6:09 ` [PATCH RFC 0/8] Introduce provisioning primitives for thinly provisioned storage Stefan Hajnoczi
2022-09-16 18:48 ` Sarthak Kukreti
2022-09-16 20:01 ` Bart Van Assche
2022-09-16 21:59 ` Sarthak Kukreti
2022-09-20 7:46 ` Christoph Hellwig
[not found] ` <CAAKderPF5Z5QLxyEb80Y+90+eR0sfRmL-WfgXLp=eL=HxWSZ9g@mail.gmail.com>
2022-09-20 11:30 ` Christoph Hellwig
[not found] ` <CAAKderNcHpbBqWqqd5-WuKLRCQQUt7a_4D4ti4gy15+fKGK0vQ@mail.gmail.com>
2022-09-21 15:08 ` Mike Snitzer
2022-09-23 8:51 ` Christoph Hellwig
2022-09-23 14:08 ` Mike Snitzer
2022-12-29 8:17 ` Sarthak Kukreti
2022-09-17 3:03 ` [dm-devel] " Darrick J. Wong
2022-09-17 19:46 ` Sarthak Kukreti
2022-09-19 16:36 ` Stefan Hajnoczi
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