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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2012-07-23 07:22:13 +0900 |
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| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2012-07-23 07:22:13 +0900 |
| commit | c0792ffe1f4be354f62ff866cf4c7ebb367e70bb (patch) | |
| tree | c18ec30ed2c53c0b3feb41a92de2938ee582a764 /open_issues/metadata_caching.mdwn | |
| parent | e9990192bb52a2c6085d4c4d355c6ad9d8bdac67 (diff) | |
| parent | a29dec0b89f2961c8af41e6cd851b4ed9c9d28d8 (diff) | |
Merge branch 'master' of http://git.savannah.gnu.org/cgit/hurd/web
Diffstat (limited to 'open_issues/metadata_caching.mdwn')
| -rw-r--r-- | open_issues/metadata_caching.mdwn | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/open_issues/metadata_caching.mdwn b/open_issues/metadata_caching.mdwn new file mode 100644 index 00000000..f7f4cb53 --- /dev/null +++ b/open_issues/metadata_caching.mdwn @@ -0,0 +1,31 @@ +[[!meta copyright="Copyright © 2011, 2012 Free Software Foundation, Inc."]] + +[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable +id="license" text="Permission is granted to copy, distribute and/or modify this +document under the terms of the GNU Free Documentation License, Version 1.2 or +any later version published by the Free Software Foundation; with no Invariant +Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license +is included in the section entitled [[GNU Free Documentation +License|/fdl]]."]]"""]] + +[[!tag open_issue_gnumach open_issue_hurd]] + +[[!toc]] + + +# IRC, freenode, #hurd, 2012-07-08 + + <braunr> youpi: there is still quite a lot of I/O even for cached objects + <braunr> youpi: i strongly suspect these are for the metadata + <braunr> i.e. we don't have a "buffer cache", only a file cache + <braunr> (gnu is really not unix lol) + <youpi> doesn't ext2fs cache these? + <youpi> (as long as the corresponding object is cached + <youpi> ) + <braunr> i didn't look too much, but if it does, it does a bad job + <braunr> i would guess it does, but possibly only writethrough + <youpi> iirc it does writeback + <youpi> there's a sorta "node needs written" flag somewhere iirc + <braunr> but that's for the files, not the metadata + <youpi> I mean the metadata of the node + <braunr> then i have no idea what happens |