Lockups while unpacking huge tarballs (was Re: 2.6.15-$SHA1: VT <-> X sometimes odd)

[Alexey Dobriyan <adobriyan@gmail.com>]

On Thu, Jan 12, 2006 at 11:23:54AM -0800, Linus Torvalds wrote:
> On Thu, 12 Jan 2006, Alexey Dobriyan wrote:
> > Now it's vim saving 5k proggie while X tarball was unpacking on reiserfs.
> > :wq and vim freezes. Switching to another virtual "desktops" works and
> > everything in general works except vim. But switching to VT and back
> > sends system to hell.
>
> This may be fixed by the current -git tree:
>
> 	commit 1bc691d3, Tejun Heo <htejun@gmail.com>:
>
> 	[PATCH] fix queue stalling while barrier sequencing

It isn't. My HEAD is 9f5974c8734d83d4ab7096ed98136a82f41210d6 and I see
this patch in git log output.

> or if that isn't it, and you have an IDE drive, can you try if the
> appended trivial patch makes a difference?

> --- a/drivers/ide/ide-io.c
> +++ b/drivers/ide/ide-io.c
> @@ -101,7 +101,7 @@ int __ide_end_request(ide_drive_t *drive
>  	 * for those
>  	 */
>  	nbytes = nr_sectors << 9;
> -	if (!rq->errors && rq_all_done(rq, nbytes)) {
> +	if (0 && !rq->errors && rq_all_done(rq, nbytes)) {
>  		rq->data_len = nbytes;
>  		blkdev_dequeue_request(rq);
>  		HWGROUP(drive)->rq = NULL;

With this one-liner two X tarballs and one Firefox tarballs were
successfully unpacked while I was hitting :w.

Without it just one X tarball doesn't pass. It's even reproducable.

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