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Re: [PATCH 01/45] Create a dynamically sized pool of threads for doing very slow work items [ver #41]

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From: Andrew Morton
Subject: Re: [PATCH 01/45] Create a dynamically sized pool of threads for doing very slow work items [ver #41]
Date: Friday, November 21, 2008 - 11:17 am

On Fri, 21 Nov 2008 10:24:00 +0000 David Howells <dhowells@redhat.com> wrote:


OK.


Those two objectives seem incompatible.  What does a caller do when the
limit has been hit?  Do the work synchronously?

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[PATCH 00/45] Permit filesystem local caching [ver #41], David Howells, (Thu Nov 20, 7:41 am)
[PATCH 01/45] Create a dynamically sized pool of threads f ..., David Howells, (Thu Nov 20, 7:41 am)
[PATCH 02/45] Make slow-work thread pool actually dynamic ..., David Howells, (Thu Nov 20, 7:41 am)
[PATCH 03/45] Make the slow work pool configurable [ver #41], David Howells, (Thu Nov 20, 7:41 am)
[PATCH 04/45] Document the slow work thread pool [ver #41], David Howells, (Thu Nov 20, 7:42 am)
[PATCH 05/45] FS-Cache: Release page-&gt;private after failed ..., David Howells, (Thu Nov 20, 7:42 am)
[PATCH 06/45] FS-Cache: Recruit a couple of page flags for ..., David Howells, (Thu Nov 20, 7:42 am)
[PATCH 07/45] FS-Cache: Provide an add_wait_queue_tail() f ..., David Howells, (Thu Nov 20, 7:42 am)
[PATCH 08/45] FS-Cache: Add the FS-Cache netfs API and doc ..., David Howells, (Thu Nov 20, 7:42 am)
[PATCH 09/45] FS-Cache: Add the FS-Cache cache backend API ..., David Howells, (Thu Nov 20, 7:42 am)
[PATCH 10/45] FS-Cache: Add main configuration option, mod ..., David Howells, (Thu Nov 20, 7:42 am)
[PATCH 11/45] FS-Cache: Add use of /proc and presentation ..., David Howells, (Thu Nov 20, 7:42 am)
[PATCH 12/45] FS-Cache: Root index definition [ver #41], David Howells, (Thu Nov 20, 7:42 am)
[PATCH 13/45] FS-Cache: Add cache tag handling [ver #41], David Howells, (Thu Nov 20, 7:42 am)
[PATCH 14/45] FS-Cache: Add cache management [ver #41], David Howells, (Thu Nov 20, 7:42 am)
[PATCH 15/45] FS-Cache: Provide a slab for cookie allocati ..., David Howells, (Thu Nov 20, 7:42 am)
[PATCH 16/45] FS-Cache: Add netfs registration [ver #41], David Howells, (Thu Nov 20, 7:43 am)
[PATCH 17/45] FS-Cache: Bit waiting helpers [ver #41], David Howells, (Thu Nov 20, 7:43 am)
[PATCH 18/45] FS-Cache: Object management state machine [v ..., David Howells, (Thu Nov 20, 7:43 am)
[PATCH 19/45] FS-Cache: Implement the cookie management pa ..., David Howells, (Thu Nov 20, 7:43 am)
[PATCH 20/45] FS-Cache: Add and document asynchronous oper ..., David Howells, (Thu Nov 20, 7:43 am)
[PATCH 21/45] FS-Cache: Implement data I/O part of netfs A ..., David Howells, (Thu Nov 20, 7:43 am)
[PATCH 22/45] CacheFiles: Add missing copy_page export for ..., David Howells, (Thu Nov 20, 7:43 am)
[PATCH 23/45] CacheFiles: Be consistent about the use of m ..., David Howells, (Thu Nov 20, 7:43 am)
[PATCH 24/45] CacheFiles: Add a hook to write a single pag ..., David Howells, (Thu Nov 20, 7:43 am)
[PATCH 25/45] CacheFiles: Permit the page lock state to be ..., David Howells, (Thu Nov 20, 7:43 am)
[PATCH 26/45] CacheFiles: Export things for CacheFiles [ve ..., David Howells, (Thu Nov 20, 7:43 am)
[PATCH 27/45] CacheFiles: A cache that backs onto a mounte ..., David Howells, (Thu Nov 20, 7:43 am)
[PATCH 28/45] FS-Cache: Make kAFS use FS-Cache [ver #41], David Howells, (Thu Nov 20, 7:44 am)
[PATCH 29/45] NFS: Add comment banners to some NFS functio ..., David Howells, (Thu Nov 20, 7:44 am)
[PATCH 30/45] NFS: Add FS-Cache option bit and debug bit [ ..., David Howells, (Thu Nov 20, 7:44 am)
[PATCH 31/45] NFS: Permit local filesystem caching to be e ..., David Howells, (Thu Nov 20, 7:44 am)
[PATCH 32/45] NFS: Register NFS for caching and retrieve t ..., David Howells, (Thu Nov 20, 7:44 am)
[PATCH 33/45] NFS: Define and create server-level objects ..., David Howells, (Thu Nov 20, 7:44 am)
[PATCH 34/45] NFS: Define and create superblock-level obje ..., David Howells, (Thu Nov 20, 7:44 am)
[PATCH 35/45] NFS: Define and create inode-level cache obj ..., David Howells, (Thu Nov 20, 7:44 am)
[PATCH 36/45] NFS: Use local disk inode cache [ver #41], David Howells, (Thu Nov 20, 7:44 am)
[PATCH 37/45] NFS: Invalidate FsCache page flags when cach ..., David Howells, (Thu Nov 20, 7:44 am)
[PATCH 38/45] NFS: Add some new I/O counters for FS-Cache ..., David Howells, (Thu Nov 20, 7:44 am)
[PATCH 39/45] NFS: FS-Cache page management [ver #41], David Howells, (Thu Nov 20, 7:45 am)
[PATCH 40/45] NFS: Add read context retention for FS-Cache ..., David Howells, (Thu Nov 20, 7:45 am)
[PATCH 41/45] NFS: nfs_readpage_async() needs to be access ..., David Howells, (Thu Nov 20, 7:45 am)
[PATCH 42/45] NFS: Read pages from FS-Cache into an NFS in ..., David Howells, (Thu Nov 20, 7:45 am)
[PATCH 43/45] NFS: Store pages from an NFS inode into a lo ..., David Howells, (Thu Nov 20, 7:45 am)
[PATCH 44/45] NFS: Display local caching state [ver #41], David Howells, (Thu Nov 20, 7:45 am)
[PATCH 45/45] NFS: Add mount options to enable local cachi ..., David Howells, (Thu Nov 20, 7:45 am)
Re: [PATCH 11/45] FS-Cache: Add use of /proc and presentat ..., Alexey Dobriyan, (Thu Nov 20, 5:15 pm)
Re: [PATCH 11/45] FS-Cache: Add use of /proc and presentat ..., David Howells, (Thu Nov 20, 7:17 pm)
Re: [PATCH 11/45] FS-Cache: Add use of /proc and presentat ..., Alexey Dobriyan, (Thu Nov 20, 7:34 pm)
Re: [PATCH 01/45] Create a dynamically sized pool of threa ..., Andrew Morton, (Fri Nov 21, 1:09 am)
Re: [PATCH 05/45] FS-Cache: Release page-&gt;private after fa ..., Andrew Morton, (Fri Nov 21, 1:12 am)
Re: [PATCH 06/45] FS-Cache: Recruit a couple of page flags ..., Andrew Morton, (Fri Nov 21, 1:17 am)
Re: [PATCH 07/45] FS-Cache: Provide an add_wait_queue_tail ..., Andrew Morton, (Fri Nov 21, 1:17 am)
Re: [PATCH 24/45] CacheFiles: Add a hook to write a single ..., Andrew Morton, (Fri Nov 21, 1:23 am)
Re: [PATCH 00/45] Permit filesystem local caching [ver #41], Andrew Morton, (Fri Nov 21, 1:28 am)
Re: [PATCH 01/45] Create a dynamically sized pool of threa ..., David Howells, (Fri Nov 21, 3:24 am)
Re: [PATCH 05/45] FS-Cache: Release page-&gt;private after fa ..., David Howells, (Fri Nov 21, 3:27 am)
Re: [PATCH 06/45] FS-Cache: Recruit a couple of page flags ..., David Howells, (Fri Nov 21, 3:31 am)
Re: [PATCH 24/45] CacheFiles: Add a hook to write a single ..., David Howells, (Fri Nov 21, 5:43 am)
Re: [PATCH 24/45] CacheFiles: Add a hook to write a single ..., Jamie Lokier, (Fri Nov 21, 6:00 am)
Re: [PATCH 07/45] FS-Cache: Provide an add_wait_queue_tail ..., David Howells, (Fri Nov 21, 6:32 am)
Re: [PATCH 11/45] FS-Cache: Add use of /proc and presentat ..., David Howells, (Fri Nov 21, 8:32 am)
Re: [PATCH 24/45] CacheFiles: Add a hook to write a single ..., Valdis.Kletnieks, (Fri Nov 21, 10:15 am)
Re: [PATCH 24/45] CacheFiles: Add a hook to write a single ..., Randy Dunlap, (Fri Nov 21, 10:36 am)
Re: [PATCH 01/45] Create a dynamically sized pool of threa ..., Andrew Morton, (Fri Nov 21, 11:17 am)
Re: [PATCH 24/45] CacheFiles: Add a hook to write a single ..., Andrew Morton, (Fri Nov 21, 11:31 am)
Re: [PATCH 01/45] Create a dynamically sized pool of threa ..., David Howells, (Fri Nov 21, 5:38 pm)
Re: [PATCH 24/45] CacheFiles: Add a hook to write a single ..., David Howells, (Fri Nov 21, 5:48 pm)
Re: [PATCH 00/45] Permit filesystem local caching [ver #41], David Howells, (Fri Nov 21, 6:11 pm)
Re: [PATCH 00/45] Permit filesystem local caching [ver #41], David Howells, (Mon Nov 24, 5:09 pm)
FS-Cache Benchmarks, David Howells, (Tue Nov 25, 6:39 am)