Messages in this thread | | | From | Alessio Igor Bogani <> | Subject | [PATCH 0/1] vfs: umount_begin BKL pushdown v2 | Date | Fri, 24 Apr 2009 09:06:52 +0200 |
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Push the BKL acquisition from vfs to every specific filesystems with hope that it can be eliminated in a second moment.
Filesystems, which support umount_begin(), changed by this patch are 9p, nfs, cifs and fuse.
Changes: Collapsed all patches into only one as requested by Al Viro.
Moved CIFS_SB() down into BKL protected zone as requested by Matthew Wilcox.
It is hard to say if tcon (into cifs's umount_begin() function) should be protected by BKL. Up to now umount_begin() is always called with BKL held so in uncertainty I maintain same logic. So I moved unlock_kernel() to at the bottom of that function as requested by Al Viro and Matthew Wilcox.
Notes: About cifs's umount_begin() function I suspect that a deadlock or circular locking dependency can happens into kill-the-BKL tree if that patch is applied.
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