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LKML: Pavel Machek: Re: [PATCH][mm] swsusp: limit image size
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Wysocki"</a><ul><li><a href="/lkml/2005/12/9/171">Stefan Seyfried</a><ul><li class="origin"><a href="/lkml/2005/12/9/226">Pavel Machek</a><ul><li><a href="/lkml/2005/12/9/226">"Rafael J. Wysocki"</a><ul><li><a href="/lkml/2005/12/10/62">"Rafael J. Wysocki"</a></li></ul></li></ul></li></ul></li></ul></li></ul></td><td width="32" rowspan="2" class="c" valign="top"><img src="/images/icornerl.gif" width="32" height="32" alt="/" /></td><td class="c" rowspan="2" valign="top" style="padding-top: 1em"><table><tr><td><table><tr><td class="lp">Date</td><td class="rp" itemprop="datePublished">Fri, 9 Dec 2005 20:17:35 +0100</td></tr><tr><td class="lp">From</td><td class="rp" itemprop="author">Pavel Machek <></td></tr><tr><td class="lp">Subject</td><td class="rp" itemprop="name">Re: [PATCH][mm] swsusp: limit image size</td></tr></table></td><td></td></tr></table><pre itemprop="articleBody">Hi!<br /><br />> >> What happens if IMAGE_SIZE is bigger than free swap? Do we "try harder"<br />> >> or do we fail?<br />> > <br />> > First, with swsusp the image can't be bigger than 1/2 of lowmem (1/2 of RAM<br />> > on x86-64) and the too great values of IMAGE_SIZE have no effect. Still, if<br />> > the amount of free swap is smaller than 1/2 of RAM and the image happens<br />> > to be bigger, we will fail.<br />> <br />> ok. This is not nice since we might fail without any _real_ need. Can we<br />> make this parameter userspace-tweakable, so that my userspace app can do<br />> something like (pseudocode):<br />> <br />> echo 500 > /sys/power/swsusp/imagesize<br />> echo disk > /sys/power/state<br />> R=$?<br />> if [ $R -eq $ENOMEM ]; then<br />> echo 100 > /sys/power/swsusp/imagesize # try again<br /><br />You can do 'echo 0' -- as small as possible.<br /><br />> echo disk > /sys/power/state<br />> R=$?<br />> fi<br />> if [ $R -ne 0 ]; then<br />> pop_up_some_loud_beeping_window "suspend failed!"<br />> fi<br />> <br />> This would at least give us a chance for a second try. I know that Pavel<br />> dislikes userspace tunables, but i dislike failing suspends ;-)<br /><br />Can we do that when we start seeing failed suspends? I think it will<br />not happen. If we have reasonably-sized swap partition, it should be<br />ok.<br /><br /> Pavel<br />-- <br />Thanks, Sharp!<br />-<br />To unsubscribe from this list: send the line "unsubscribe linux-kernel" in<br />the body of a message to majordomo@vger.kernel.org<br />More majordomo info at <a href="http://vger.kernel.org/majordomo-info.html">http://vger.kernel.org/majordomo-info.html</a><br />Please read the FAQ at <a href="http://www.tux.org/lkml/">http://www.tux.org/lkml/</a><br /><br /></pre></td><td width="32" rowspan="2" class="c" valign="top"><img src="/images/icornerr.gif" width="32" height="32" alt="\" /></td></tr><tr><td align="right" valign="bottom"> 聽 </td></tr><tr><td align="right" valign="bottom">聽</td><td class="c" valign="bottom" style="padding-bottom: 0px"><img src="/images/bcornerl.gif" width="32" height="32" alt="\" /></td><td class="c">聽</td><td class="c" valign="bottom" style="padding-bottom: 0px"><img src="/images/bcornerr.gif" width="32" height="32" alt="/" /></td></tr><tr><td align="right" valign="top" colspan="2"> 聽 </td><td class="lm">Last update: 2005-12-09 20:20 聽聽 [from the cache]<br />漏2003-2020 <a href="http://blog.jasper.es/"><span itemprop="editor">Jasper Spaans</span></a>|hosted at <a href="https://www.digitalocean.com/?refcode=9a8e99d24cf9">Digital Ocean</a> and my Meterkast|<a href="http://blog.jasper.es/categories.html#lkml-ref">Read the blog</a></td><td>聽</td></tr></table><script language="javascript" src="/js/styleswitcher.js" type="text/javascript"></script></body></html>