Messages in this thread | | | Date | Fri, 28 Jul 2000 10:13:04 -0400 | From | "Theodore Y. Ts'o" <> | Subject | Re: 2.4 status page, lightly updated |
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Date: Fri, 28 Jul 2000 14:48:26 +0100 (BST) From: Alan Cox <alan@lxorguk.ukuu.org.uk>
> > Audit all char and block drivers to ensure they are safe with the 2.3 > > locking - a lot of them are not especially on the open() path. > > What about the open() path? They have (or grab) BKL there, so it should > not be something special. Now, read() and write()...
They dont all get open right either ;) And yes a lot get read/write wrong or assume incorrectly that single opener == single threaded read/write.
Um, open's of char and block devices grab the BKL in fs/devices.c and fs/block_dev.c. So I believe the open routines of the character and block devices already have the BKL on entry. Am I missing something here?
read/write SMP issues for device drivers is definitely an issue; I've added it to the list.
- Ted
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