lkml.org 
[lkml]   [2013]   [Oct]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [rfc][possible solution] RCU vfsmounts
    On Mon, Sep 30, 2013 at 08:49:21PM +0100, Al Viro wrote:
    > * btrfs: wants btrfs_root_readonly(BTRFS_I(inode)->root) usable in
    > ->permission(). Delayed freeing of struct btrfs_root, perhaps?

    Not needed, actually - it's only checked with MAY_WRITE, and we don't
    pass that in RCU mode.

    Anyway, I've slapped what looks like a sufficient set of synchronize_rcu()
    in affected filesystems and re-pushed. Result is at least supposed to cover
    all of them. It still might bugger your memory, chew the disks, etc., so
    it's only for testing on scratch boxen at that point.

    Still, review and (if you are really brave) testing would be very much
    appreciated.

    I'll post the patchset on top of the current mainline in a few.


    \
     
     \ /
      Last update: 2013-10-03 08:41    [W:4.044 / U:0.004 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site