Messages in this thread | | | Date | Fri, 4 Jun 2010 04:38:18 -0400 | From | Christoph Hellwig <> | Subject | Re: [patch 1/4] fs: cleanup files_lock |
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On Fri, Jun 04, 2010 at 04:43:08PM +1000, Nick Piggin wrote: > Lock tty_files with a new spinlock, tty_files_lock; provide helpers to > manipulate the per-sb files list; unexport the files_lock spinlock.
I'm still not entirely happy with this. You keep making the tty a special case by removing it from the files per-sb files list while nothing else in the system is removed from it.
Thinks would be much better if you could untangle the tty code from abuse of file->f_u.fu_list entirely. And from a naive look at the tty code that actually seems pretty easy. file->private for ttys currently directly points to the tty struct. If you add a tty_private there which points back to the file, the tty and contains a list_head the open files in tty code tracking code can be completely divorced from the per-sb file tracking. After that we can decide what to do with the per-sb file tracking, where my favourite still is to get rid of it entirely.
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