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  1. Lustre
  2. LU-13833

hook llite to inode cache shrinker

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Details

    • Bug
    • Resolution: Unresolved
    • Major
    • Upstream
    • None
    • 3
    • 9223372036854775807

    Description

      In upstream kernel commit v3.0-rc7-226-g0e1fdafd9398, the filesystem can implement icache/dcache shrinkers on a per-superblock basis:

      commit 0e1fdafd93980eac62e778798549ce0f6073905c
Author:     Dave Chinner <dchinner@redhat.com>
AuthorDate: Fri Jul 8 14:14:44 2011 +1000
Commit:     Al Viro <viro@zeniv.linux.org.uk>
CommitDate: Wed Jul 20 20:47:41 2011 -0400

    superblock: add filesystem shrinker operations
    
    Now we have a per-superblock shrinker implementation, we can add a
    filesystem specific callout to it to allow filesystem internal
    caches to be shrunk by the superblock shrinker.
    
    Rather than perpetuate the multipurpose shrinker callback API (i.e.
    nr_to_scan == 0 meaning "tell me how many objects freeable in the
    cache), two operations will be added. The first will return the
    number of objects that are freeable, the second is the actual
    shrinker call.
    
    Signed-off-by: Dave Chinner <dchinner@redhat.com>
    Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

      It would be useful to hook the client dcache/icache/LDLM cache into these shrinker callbacks so that it can more effectively manage cache sizes on clients.

      Attachments

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-14408 very large lustre_inode_cache

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. LU-13983 rmdir should release inode on Lustre client

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Improvement - An improvement or enhancement to an existing feature or task. LU-18175 Enhance Lustre to exploit new shrinker handling

          • Major - Major loss of function.
          • In Progress

          Improvement - An improvement or enhancement to an existing feature or task. LU-13970 add an option to disable inode cache on Lustre client

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved
          is related to

          Improvement - An improvement or enhancement to an existing feature or task. LU-12511 Prepare lustre for adoption into the linux kernel

          • Major - Major loss of function.
          • Open

          Activity

            People

              simmonsja James A Simmons
              adilger Andreas Dilger
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              Dates

                Created:
                Updated: