Re: [PATCH] coredump: Retry writes where appropriate

From: Olivier Galibert
Date: Sun May 31 2009 - 10:04:06 EST

On Sun, May 31, 2009 at 11:18:51AM +0100, Alan Cox wrote:
> On Sun, 31 May 2009 01:33:39 -0400
> Paul Smith <paul@xxxxxxxxxxxxxxxxx> wrote:
> > coredump: Retry writes where appropriate
> >
> > Core dump write operations (especially to a pipe) can be incomplete due
> > to signal reception or possibly recoverable partial writes.
> NAK this
> > Previously any incomplete write in the ELF core dumper caused the core
> > dump to stop, giving short cores in these cases. Modify the core dumper
> > to retry the write where appropriate.
> The existing behaviour is an absolute godsend when you've something like
> a core dump stuck on an NFS mount or something trying to core dump to
> very slow media.
> In fact the signals checks were *purposefully added* some time ago.

Perhaps removing the "|| r == -EINTR" part would make both of you
happy? He gets the reliability on pipes, you keep the interrupt on

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