From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: comments on irc log Date: Sat, 19 Mar 2005 11:32:38 +0100 Message-ID: <20050319103238.GL24449@elf.ucw.cz> References: <1111187278.1236.187.camel@gaston> <20050318231801.GE24449@elf.ucw.cz> <1111195262.25179.201.camel@gaston> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============16567698893018501==" In-Reply-To: <1111195262.25179.201.camel@gaston> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces-qjLDD68F18O7TbgM5vRIOg@public.gmane.org Errors-To: linux-pm-bounces-qjLDD68F18O7TbgM5vRIOg@public.gmane.org To: Benjamin Herrenschmidt Cc: Linux-pm mailing list List-Id: linux-pm@vger.kernel.org --===============16567698893018501== Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi! > > > This is sort-of breaking the rule of "no DMA", and thus is not suitable > > > for kexec (which is ok, kexec currently uses the separate "shutdown" > > > callback which must switch DMA off), but would fix the problem for > > > suspend to disk... > > > > What problem? suspend seems to +/- work with suspend-to-disk just > > now. I'd really hate to have to think about "some memory may change > > behind my back" during suspend. I think "no DMA" is a good rule. > > Well, it's not that simple. It may work for you and not for others, and > it will definitely introduce complications with the current scheme since > it seems we +/- have to suspend USB busses (and possibly disconnect some > devices) at freeze time... Okay, I see that can be slow. Is there any other problem? ...and I probably would not want to suspend to my external usb2 disk... Ok, that might be small problem. Pavel -- People were complaining that M$ turns users into beta-testers... ...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl! --===============16567698893018501== Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline --===============16567698893018501==--