From: David Wysochanski <dwysocha@redhat.com>
To: David Howells <dhowells@redhat.com>
Cc: linux-cachefs <linux-cachefs@redhat.com>,
Trond Myklebust <trond.myklebust@hammerspace.com>,
Anna Schumaker <anna.schumaker@netapp.com>,
linux-nfs <linux-nfs@vger.kernel.org>,
Trond Myklebust <trondmy@hammerspace.com>,
Jeff Layton <jlayton@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v3 63/68] nfs: Convert to new fscache volume/cookie API
Date: Fri, 17 Dec 2021 08:35:14 -0500 [thread overview]
Message-ID: <CALF+zOnerPWd7wYD0sC_v8rTeN0KHgP2abkDWWVGLr4QVrbSzg@mail.gmail.com> (raw)
In-Reply-To: <1958026.1639747261@warthog.procyon.org.uk>
On Fri, Dec 17, 2021 at 8:21 AM David Howells <dhowells@redhat.com> wrote:
>
> David Wysochanski <dwysocha@redhat.com> wrote:
>
> > >
> > > (4) fscache_enable/disable_cookie() have been removed.
> > >
> > > Call fscache_use_cookie() and fscache_unuse_cookie() when a file is
> > > opened or closed to prevent a cache file from being culled and to keep
> > > resources to hand that are needed to do I/O.
> > >
> > > Unuse the cookie when a file is opened for writing. This is gated by
> > > the NFS_INO_FSCACHE flag on the nfs_inode.
> > >
> > > A better way might be to invalidate it with FSCACHE_INVAL_DIO_WRITE
> > > which will keep it unused until all open files are closed.
> > >
> >
> > Comment still out of date here, reference
> > https://marc.info/?l=linux-nfs&m=163922984027745&w=4
>
> Okay, how about:
>
> (4) fscache_enable/disable_cookie() have been removed.
>
> Call fscache_use_cookie() and fscache_unuse_cookie() when a file is
> opened or closed to prevent a cache file from being culled and to keep
> resources to hand that are needed to do I/O.
>
> If a file is opened for writing, we invalidate it with
> FSCACHE_INVAL_DIO_WRITE in lieu of doing writeback to the cache,
> thereby making it cease caching until all currently open files are
> closed. This should give the same behaviour as the uptream code.
> Making the cache store local modifications isn't straightforward for
> NFS, so that's left for future patches.
>
Yes, that is more accurate.
next prev parent reply other threads:[~2021-12-17 13:35 UTC|newest]
Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-16 16:05 [PATCH v3 00/68] fscache, cachefiles: Rewrite David Howells
2021-12-16 16:05 ` [PATCH v3 01/68] fscache, cachefiles: Disable configuration David Howells
2021-12-16 16:06 ` [PATCH v3 02/68] cachefiles: Delete the cachefiles driver pending rewrite David Howells
2021-12-16 16:06 ` [PATCH v3 03/68] fscache: Remove the contents of the fscache driver, " David Howells
2021-12-16 16:06 ` [PATCH v3 04/68] netfs: Display the netfs inode number in the netfs_read tracepoint David Howells
2021-12-16 16:06 ` [PATCH v3 05/68] netfs: Pass a flag to ->prepare_write() to say if there's no alloc'd space David Howells
2021-12-16 16:06 ` [PATCH v3 06/68] fscache: Introduce new driver David Howells
2021-12-16 16:07 ` [PATCH v3 07/68] fscache: Implement a hash function David Howells
2021-12-16 16:07 ` [PATCH v3 08/68] fscache: Implement cache registration David Howells
2021-12-16 16:07 ` [PATCH v3 09/68] fscache: Implement volume registration David Howells
2021-12-16 16:08 ` [PATCH v3 10/68] fscache: Implement cookie registration David Howells
2021-12-16 16:08 ` [PATCH v3 11/68] fscache: Implement cache-level access helpers David Howells
2021-12-16 16:09 ` [PATCH v3 12/68] fscache: Implement volume-level " David Howells
2021-12-16 16:09 ` [PATCH v3 13/68] fscache: Implement cookie-level " David Howells
2021-12-16 16:09 ` [PATCH v3 14/68] fscache: Implement functions add/remove a cache David Howells
2021-12-16 16:09 ` [PATCH v3 15/68] fscache: Provide and use cache methods to lookup/create/free a volume David Howells
2021-12-16 16:10 ` [PATCH v3 16/68] fscache: Add a function for a cache backend to note an I/O error David Howells
2021-12-16 16:10 ` [PATCH v3 17/68] fscache: Implement simple cookie state machine David Howells
2021-12-17 19:07 ` Jeff Layton
2021-12-17 19:45 ` David Howells
2021-12-16 16:11 ` [PATCH v3 18/68] fscache: Implement cookie user counting and resource pinning David Howells
2021-12-17 19:42 ` Jeff Layton
2021-12-17 20:43 ` David Howells
2021-12-16 16:11 ` [PATCH v3 19/68] fscache: Implement cookie invalidation David Howells
2021-12-16 16:11 ` [PATCH v3 20/68] fscache: Provide a means to begin an operation David Howells
2021-12-16 16:11 ` [PATCH v3 21/68] fscache: Count data storage objects in a cache David Howells
2021-12-16 16:12 ` [PATCH v3 22/68] fscache: Provide read/write stat counters for the cache David Howells
2021-12-16 16:12 ` [PATCH v3 23/68] fscache: Provide a function to let the netfs update its coherency data David Howells
2021-12-16 16:13 ` [PATCH v3 24/68] netfs: Pass more information on how to deal with a hole in the cache David Howells
2021-12-16 16:13 ` [PATCH v3 25/68] fscache: Implement raw I/O interface David Howells
2021-12-16 16:13 ` [PATCH v3 26/68] fscache: Implement higher-level write " David Howells
2021-12-16 16:14 ` [PATCH v3 27/68] vfs, fscache: Implement pinning of cache usage for writeback David Howells
2021-12-16 16:14 ` [PATCH v3 28/68] fscache: Provide a function to note the release of a page David Howells
2021-12-16 16:14 ` [PATCH v3 29/68] fscache: Provide a function to resize a cookie David Howells
2021-12-16 16:15 ` [PATCH v3 30/68] cachefiles: Introduce rewritten driver David Howells
2021-12-16 16:15 ` [PATCH v3 31/68] cachefiles: Define structs David Howells
2021-12-16 16:15 ` [PATCH v3 32/68] cachefiles: Add some error injection support David Howells
2021-12-16 16:15 ` [PATCH v3 33/68] cachefiles: Add a couple of tracepoints for logging errors David Howells
2021-12-16 16:16 ` [PATCH v3 34/68] cachefiles: Add cache error reporting macro David Howells
2021-12-16 16:16 ` [PATCH v3 35/68] cachefiles: Add security derivation David Howells
2021-12-16 16:16 ` [PATCH v3 36/68] cachefiles: Register a miscdev and parse commands over it David Howells
2021-12-16 16:16 ` [PATCH v3 37/68] cachefiles: Provide a function to check how much space there is David Howells
2021-12-16 16:16 ` [PATCH v3 38/68] vfs, cachefiles: Mark a backing file in use with an inode flag David Howells
2021-12-16 16:16 ` [PATCH v3 39/68] cachefiles: Implement a function to get/create a directory in the cache David Howells
2021-12-16 16:17 ` [PATCH v3 40/68] cachefiles: Implement cache registration and withdrawal David Howells
2021-12-16 16:17 ` [PATCH v3 41/68] cachefiles: Implement volume support David Howells
2021-12-16 16:17 ` [PATCH v3 42/68] cachefiles: Add tracepoints for calls to the VFS David Howells
2021-12-16 16:18 ` [PATCH v3 43/68] cachefiles: Implement object lifecycle funcs David Howells
2021-12-16 16:18 ` [PATCH v3 44/68] cachefiles: Implement key to filename encoding David Howells
2021-12-16 16:18 ` [PATCH v3 45/68] cachefiles: Implement metadata/coherency data storage in xattrs David Howells
2021-12-16 16:19 ` [PATCH v3 46/68] cachefiles: Mark a backing file in use with an inode flag David Howells
2021-12-16 16:19 ` [PATCH v3 47/68] cachefiles: Implement culling daemon commands David Howells
2021-12-16 16:19 ` [PATCH v3 48/68] cachefiles: Implement backing file wrangling David Howells
2021-12-16 16:20 ` [PATCH v3 49/68] cachefiles: Implement begin and end I/O operation David Howells
2021-12-16 16:20 ` [PATCH v3 50/68] cachefiles: Implement cookie resize for truncate David Howells
2021-12-16 16:20 ` [PATCH v3 51/68] cachefiles: Implement the I/O routines David Howells
2021-12-16 16:20 ` [PATCH v3 52/68] fscache, cachefiles: Store the volume coherency data David Howells
2021-12-16 16:20 ` [PATCH v3 53/68] cachefiles: Allow cachefiles to actually function David Howells
2021-12-16 16:21 ` [PATCH v3 54/68] fscache, cachefiles: Display stats of no-space events David Howells
2021-12-16 16:21 ` [PATCH v3 55/68] fscache, cachefiles: Display stat of culling events David Howells
2021-12-16 16:21 ` [PATCH v3 56/68] afs: Handle len being extending over page end in write_begin/write_end David Howells
2021-12-16 16:31 ` Linus Torvalds
2021-12-16 19:28 ` Matthew Wilcox
2021-12-16 19:46 ` Linus Torvalds
2021-12-16 20:20 ` Matthew Wilcox
2021-12-16 21:17 ` David Howells
2021-12-16 16:47 ` David Howells
2021-12-16 16:22 ` [PATCH v3 57/68] afs: Fix afs_write_end() to handle len > page size David Howells
2021-12-16 16:27 ` Linus Torvalds
2021-12-16 16:22 ` [PATCH v3 58/68] afs: Convert afs to use the new fscache API David Howells
2021-12-16 16:22 ` [PATCH v3 59/68] afs: Copy local writes to the cache when writing to the server David Howells
2021-12-16 16:22 ` [PATCH v3 60/68] afs: Skip truncation on the server of data we haven't written yet David Howells
2021-12-16 16:23 ` [PATCH v3 61/68] 9p: Use fscache indexing rewrite and reenable caching David Howells
2021-12-16 16:23 ` [PATCH v3 62/68] 9p: Copy local writes to the cache when writing to the server David Howells
2021-12-16 16:23 ` [PATCH v3 63/68] nfs: Convert to new fscache volume/cookie API David Howells
2021-12-17 12:53 ` David Wysochanski
2021-12-17 13:21 ` David Howells
2021-12-17 13:35 ` David Wysochanski [this message]
2021-12-16 16:24 ` [PATCH v3 64/68] nfs: Implement cache I/O by accessing the cache directly David Howells
2021-12-16 16:24 ` [PATCH v3 65/68] cifs: Support fscache indexing rewrite (untested) David Howells
2021-12-16 16:24 ` [PATCH v3 66/68] ceph: conversion to new fscache API David Howells
2021-12-16 16:25 ` [PATCH v3 67/68] ceph: add fscache writeback support David Howells
2021-12-16 16:25 ` [PATCH v3 68/68] fscache: Rewrite documentation David Howells
2021-12-17 20:13 ` [PATCH v3 00/68] fscache, cachefiles: Rewrite Jeff Layton
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CALF+zOnerPWd7wYD0sC_v8rTeN0KHgP2abkDWWVGLr4QVrbSzg@mail.gmail.com \
--to=dwysocha@redhat.com \
--cc=anna.schumaker@netapp.com \
--cc=dhowells@redhat.com \
--cc=jlayton@kernel.org \
--cc=linux-cachefs@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-nfs@vger.kernel.org \
--cc=torvalds@linux-foundation.org \
--cc=trond.myklebust@hammerspace.com \
--cc=trondmy@hammerspace.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).