Henry wrote:
>
> ...
> So far, so good. There has not been a single oops on the two principle
> servers I patched.
>
> uptime1: 8:04am up 18:22, 1 user, load average: 0.09, 0.15, 0.11
> uptime2: 8:04am up 18:25, 1 user, load average: 0.15, 0.20, 0.15
OK, that looks good.
> Andrew my china, you are the _MAN_!
Not only that - I have great legs!
> We should know by monday afternoon
> (the monday morning/midday crunch should provide some valuable
> feedback).
I wonder why it only affects you. Is the drive which holds
your swap partition running in PIO mode? `hdparm' will tell
you. If it is, then that could easily cause the page to come
unlocked before brw_page() has finished touching the buffer
ring. Then all it takes is a parallel try_to_free_buffers
on the other CPU.
There's a similar bug in __block_write_full_page(). I'll
send a patch...
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