On Sun, Nov 8, 2009 at 8:13 PM, Majed B. <majedb@xxxxxxxxx> wrote: > The firmware which introduced the TRIM command was deemed buggy and > has been pulled out. > > Are there any filesystems that are TRIM-aware? > > On Sun, Nov 8, 2009 at 8:57 PM, Bill Davidsen <davidsen@xxxxxxx> wrote: >> For those of us playing with use of SSD for journals on ext[34], this does >> have implications for RAID performance. >> >> http://hardware.slashdot.org/story/09/10/27/1427209/Intel-Updates-SSDs-Supports-TRIM-Faster-Writes >> >> -- >> Bill Davidsen <davidsen@xxxxxxx> > -- > Majed B. Majed, There are various ways to address the TRIM issue. My favorite is to have a once a day (or whatever) process invoked by cron that scans a filesystem for unused space, then calls trim on all of the unused chunks. Mark Lord had this working via fallocate calls from user space a couple months ago. See <http://markmail.org/message/rytr4jqx52h2wftm> fyi: Mark Lord is the hdparm maintainer and I think you can get his userspace stuff from sourceforge. I think the kernel code is already in vanilla. fyi2: I have not had my hands on a trim capable SSD so I have not tried Mark's code yet. Greg -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
