Kawai, Hidehiro <[email protected]> wrote:
> Is coredump_setting_sem a global semaphore? If so, it prevents concurrent
> core dumping.
No, it doesn't. Look again:
int do_coredump(long signr, int exit_code, struct pt_regs * regs)
{
<setup vars>
>>>> down_read(&coredump_settings_sem);
> Additionally, while some process is dumped, writing to
> coredump_omit_anon_shared of unrelated process will be blocked.
Yes, but that's probably reasonable. How likely (a) is a process to coredump,
and (b) is a coredump to occur simultaneously with someone altering their
settings?
David
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