On Tue, Feb 20, 2007 at 10:58:17AM +0000, David Howells wrote:
> Kawai, Hidehiro <[email protected]> wrote:
> Actually, I don't think the locking is that hard or that complex.
>
> int do_coredump(long signr, int exit_code, struct pt_regs * regs)
> {
> <setup vars>
>
> down_read(&coredump_settings_sem);
>
> ...
>
> fail:
> up_read(&coredump_settings_sem);
> return retval;
> }
>
> And:
>
> static ssize_t proc_coredump_omit_anon_shared_write(struct file *file,
> const char __user *buf,
> size_t count,
> loff_t *ppos)
> {
> <setup vars>
>
> down_write(&coredump_settings_sem);
If the dump has started, do we want to change this to a trylock and skip
changing the value if it is already locked?
Thanks,
Robin
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