Re: [PATCH 00/27] Push down BKL to the filesystems (v2)

From: Jan Blunck
Date: Mon Nov 02 2009 - 08:30:49 EST

On Mon, Nov 02, Christian Borntraeger wrote:

> Am Montag 02 November 2009 11:04:40 schrieb Jan Blunck:
> > During the realtime preemption mini-summit we discussed the entire removal
> > of the big kernel lock. I've started working on this for some filesystems.
> > My plan is to push the BKL down to the implementations first and remove it
> > from there later.
> >
> > This series is pushing the BKL from do_new_mount() down to the filesystems
> > and removes it from ext series of filesystems and one other trivial use:
> > if the BKL is only used in get_sb/fill_super due to the push-down, we just
> > need to make sure that parallel calls to get_sb/fill_super would race
> > against each other.
> seems that patch 1 (the pushdown) did not yet made it to the list.

Seems that the CC list was too long because I used together
with git-send-email on this patch ...

> Looking at
> you diffstat it seems that you only touched fs/*
> There are filesystems in other places, e.g.
> drivers/isdn/capi/capifs.c,
> arch/powerpc/platforms/cell/spufs/inode.c
> or
> arch/s390/hypfs/inode.c
> I am really not an expert in filesystems, so my comment might be bogus: My
> expection was, that a simple pushdown should also affect these filesystems,
> especially if the filesystems dont use simple_fill_super, no?

D'Oh! You are totally correct. Seems that nothing important outside of fs/
actually requires the BKL since my box is still wor
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