From: JeffleXu <jefflexu@linux.alibaba.com>
To: Matthew Wilcox <willy@infradead.org>
Cc: dhowells@redhat.com, linux-cachefs@redhat.com, xiang@kernel.org,
chao@kernel.org, linux-erofs@lists.ozlabs.org,
linux-fsdevel@vger.kernel.org, joseph.qi@linux.alibaba.com,
bo.liu@linux.alibaba.com, tao.peng@linux.alibaba.com,
gerry@linux.alibaba.com, eguan@linux.alibaba.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 19/23] cachefiles: implement .demand_read() for demand read
Date: Thu, 20 Jan 2022 20:43:57 +0800 [thread overview]
Message-ID: <a5b495d3-cafe-548a-2130-b7aa9e597f41@linux.alibaba.com> (raw)
In-Reply-To: <YegQOHs9yjIgu1Qi@casper.infradead.org>
On 1/19/22 9:20 PM, Matthew Wilcox wrote:
> On Wed, Jan 12, 2022 at 05:02:13PM +0800, JeffleXu wrote:
>> I'm afraid IDR can't be replaced by xarray here. Because we need an 'ID'
>> for each pending read request, so that after fetching data from remote,
>> user daemon could notify kernel which read request has finished by this
>> 'ID'.
>>
>> Currently this 'ID' is get from idr_alloc(), and actually identifies the
>> position of corresponding read request inside the IDR tree. I can't find
>> similar API of xarray implementing similar function, i.e., returning an
>> 'ID'.
>
> xa_alloc().
>
Oh yes. Thanks. I will try to convert to xarray API...
--
Thanks,
Jeffle
next prev parent reply other threads:[~2022-01-20 12:44 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-27 12:54 [PATCH v1 00/23] fscache,erofs: fscache-based demand-read semantics Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 01/23] cachefiles: add cachefiles_demand devnode Jeffle Xu
2021-12-28 2:47 ` Joseph Qi
2021-12-28 12:34 ` JeffleXu
2021-12-27 12:54 ` [PATCH v1 02/23] cachefiles: add mode command to distinguish modes Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 03/23] cachefiles: detect backing file size in demand-read mode Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 04/23] netfs: make ops->init_rreq() optional Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 05/23] netfs: add inode parameter to netfs_alloc_read_request() Jeffle Xu
2022-01-04 14:00 ` Gao Xiang
2022-01-13 3:10 ` [Linux-cachefs] " JeffleXu
2022-01-13 12:09 ` Gao Xiang
2021-12-27 12:54 ` [PATCH v1 06/23] erofs: export erofs_map_blocks() Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 07/23] erofs: add nodev mode Jeffle Xu
2022-01-04 14:33 ` Gao Xiang
2022-01-04 14:58 ` Gao Xiang
2022-01-05 9:04 ` JeffleXu
2021-12-27 12:54 ` [PATCH v1 08/23] erofs: register global fscache volume Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 09/23] erofs: add cookie context helper functions Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 10/23] erofs: add anonymous inode managing page cache of blob file Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 11/23] erofs: register cookie context for bootstrap Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 12/23] erofs: implement fscache-based metadata read Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 13/23] erofs: implement fscache-based data read Jeffle Xu
2022-01-03 6:32 ` JeffleXu
2022-01-04 14:40 ` Gao Xiang
2022-01-05 2:29 ` JeffleXu
2021-12-27 12:54 ` [PATCH v1 14/23] erofs: register cookie context for data blobs Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 15/23] erofs: implement fscache-based data read " Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 16/23] erofs: add 'uuid' mount option Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 17/23] netfs: support on demand read Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 18/23] cachefiles: use idr tree managing pending " Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 19/23] cachefiles: implement .demand_read() for " Jeffle Xu
2021-12-27 15:36 ` Matthew Wilcox
2021-12-28 12:33 ` JeffleXu
2022-01-12 9:02 ` JeffleXu
2022-01-19 13:20 ` Matthew Wilcox
2022-01-20 12:43 ` JeffleXu [this message]
2021-12-27 12:54 ` [PATCH v1 20/23] cachefiles: implement .poll() " Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 21/23] cachefiles: implement .read() " Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 22/23] cachefiles: add done command " Jeffle Xu
2021-12-27 12:54 ` [PATCH v1 23/23] erofs: support on " Jeffle Xu
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