Date: Tue, 22 May 2018 23:32:46 +0000 From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 228359] rebuild gmirror + ufs + ssd +trim Message-ID: <bug-228359-3630-aT0zfGAssj@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-228359-3630@https.bugs.freebsd.org/bugzilla/> References: <bug-228359-3630@https.bugs.freebsd.org/bugzilla/>
next in thread | previous in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D228359 --- Comment #17 from Kirk McKusick <mckusick@FreeBSD.org> --- I just looked at the implementation of the fsck_ffs -E option and it is alr= eady aggregating the free blocks into the largest trim blocks that it is able to create. It would be interesting to try running fsck_ffs with the -E and -d options (-d is causes debug output including a listing of the size and loca= tion of every trim command). On an empty filesystem it should yield one trim per cylinder group which is close to the size of the cylinder group (typically about 500Mb). I don't have a unused SSD to try this out on, but I am curiou= s if one of you can try this experiment. Unless I am misreading the code, I think that we are doing the best that we can. --=20 You are receiving this mail because: You are the assignee for the bug.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-228359-3630-aT0zfGAssj>