From: Douglas Gilbert <dougg@torque.net>
To: Richard Gooch <rgooch@ras.ucalgary.ca>
Cc: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: [RFT] Support for ~2144 SCSI discs
Date: Tue, 31 Jul 2001 21:05:43 -0400 [thread overview]
Message-ID: <3B6755E7.B63FA6D5@torque.net> (raw)
In-Reply-To: <200107310030.f6V0UeJ13558@mobilix.ras.ucalgary.ca> <rgooch@ras.ucalgary.ca> <10107310041.ZM233282@classic.engr.sgi.com> <200107311225.f6VCPj003249@mobilix.ras.ucalgary.ca> <20010731125926.B10914@us.ibm.com> <200108010048.f710miA05150@mobilix.ras.ucalgary.ca>
Richard Gooch wrote:
>
> Mike Anderson writes:
> > In previous experiments trying to connect up to 512 devices we
> > switched to vmalloc because the static nature of sd.c's allocation
> > exceeds 128k which I assumed was the max for kmalloc YMMV.
>
> Yes, I figure on switching to vmalloc() and putting in an
> in_interrupt() test in sd_init() to make sure the vmalloc() is safe.
>
> Eric: do you happen to know why there are these GFP_ATOMIC flags?
> To my knowledge, nothing calls sd_init() outside of process context.
Richard,
I've seen GFP_KERNEL take 10 minutes in lk 2.4.6 . The
mm gets tweaked pretty often so it is difficult to know
exactly how it will react when memory is tight. A time
bound would be useful on GFP_KERNEL.
<opinion> It is best to find out quickly there is
not enough memory and have some alternate strategy
to cope with that problem. GFP_KERNEL in its current
form should be taken out and shot. </opinion>
Doug Gilbert
next prev parent reply other threads:[~2001-08-01 1:08 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-31 0:30 [RFT] Support for ~2144 SCSI discs Richard Gooch
2001-07-31 7:41 ` Jeremy Higdon
2001-07-31 12:25 ` Richard Gooch
2001-07-31 19:59 ` Mike Anderson
2001-07-29 20:34 ` Alan Cox
2001-08-01 0:48 ` Richard Gooch
2001-08-01 1:05 ` Douglas Gilbert [this message]
2001-08-02 5:13 ` Richard Gooch
2001-07-31 14:10 ` Eric Youngdale
2001-07-31 22:38 ` Mike Panetta
2001-08-01 0:39 ` Richard Gooch
2001-08-01 14:33 ` Eric Youngdale
2001-08-02 14:06 ` Karcaw
2001-08-02 15:03 ` Richard Gooch
[not found] <no.id>
2001-08-02 15:08 ` Alan Cox
2001-08-02 15:13 ` Richard Gooch
2001-08-02 15:31 ` Alan Cox
2001-08-02 23:17 ` Douglas Gilbert
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