Re: chroot_fs_refs() question

From: Alexander Viro (
Date: Thu Apr 27 2000 - 08:28:41 EST

On Thu, 27 Apr 2000, Tigran Aivazian wrote:

> Hi Al,
> I see in fs/super.c:chroot_fs_refs() that you surrounded the code which is
> protected by tasklist_lock spinlock with dget/dput of old_root (and
> corresponding mntget/mntput though they are harmless at present) to avoid
> dput(old_root) blocking inside set_fs_root().
> But doesn't the same applies to dput(old_pwd) which can still block in
> each individual set_fs_pwd()? Or, there must be some trick you've done
> that I am missing from looking at the source - hence this email..

Erm.. _What_ old_pwd? Check the code - especially the comparison before
set_fs_pwd() call...

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