On Sun, Oct 31, 2010 at 10:12 AM, Daniel Clark <[email protected]> wrote: > On Wed, Oct 27, 2010 at 10:22 PM, Daniel Clark <[email protected]> wrote: >> >> On Tue, Mar 16, 2010 at 11:09 AM, Daniel Clark <[email protected]> wrote: >>> >>> While you are looking at that oh, remember this older post from Wu (as >>> far as I know this is not yet fixed): >>> >>> We have found a bug in the 2D acceleration of sm7xx video driver, it may >>> make the whole system hang when scrolling the screen, for example, if we >>> copy some files from another machines to yeeloong via scp and the screen >>> output is enabled, the whole system may hang. >>> >>> Before this bug is really fixed, please ensure CONFIG_FB_SM7XX_ACCEL is >>> disabled: >>> >>> $ gunzip < /proc/config.gz | grep SM7XX >>> CONFIG_FB_SM7XX=y >>> # CONFIG_FB_SM7XX_ACCEL is not set >> >> Anyone know if this is fixed in any more recent released or testing >> version of Linux? > > FYI testing a .32 linux with CONFIG_FB_SM7XX_ACCEL vs. without, with is > about 6x faster (using a highly unscientific test of "time cat > /usr/share/dict/words", got about 1600 lines/sec > using CONFIG_FB_SM7XX_ACCEL=y, and 250 lines/sec without it. (Of course with > it, in the past I and others have experienced hard linux lockups.)
So, CONFIG_FB_SM7XX_ACCEL is really very useful. > For comparison people got around 2500-4000 lines/sec on various expensive > thinkpad hardware, presumably that had _ACCEL for their graphics chipsets > enabled. > Also I couldn't find anything about the CONFIG_FB_SM7XX_ACCEL=y bug > in https://bugzilla.kernel.org - I'm looking for other places that describe > it in order to put a bug report in there, unless someone with more of a clue > of what the actual problem is would like to do so. No need to report a bug for CONFIG_FB_SM7XX_ACCEL=y there, the support of this option has been removed from the mainline linux. so, if we folks have time and interest to work on it, perhaps we need to rework the ACCEL support which exist in linux-loongson-2.6.31:drivers/video/sm712/ [1] Thanks. Wu Zhangjin ----------- [1] http://dev.lemote.com/code/linux-loongson-community -- You received this message because you are subscribed to the Google Groups "loongson-dev" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/loongson-dev?hl=en.
