lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <20100214180339.GH5337@thunk.org> Date: Sun, 14 Feb 2010 13:03:39 -0500 From: tytso@....edu To: Jari Sundell <sundell.software@...il.com> Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-ext4@...r.kernel.org Subject: Re: Extents in spare files on ext4 not being merged On Sun, Feb 14, 2010 at 10:50:45PM +0900, Jari Sundell wrote: > http://libtorrent.rakshasa.no/ticket/460#comment:49 > > Some users of rtorrent reported very high number of extents for files > despite the use of posix_fallocate/fallocate on ext4. (3000+ for 250MB > file, ) A test program showed that the file was contiguous on disk > despite the high number of extents reported by filefrag. (Not sure > what kernel versions they used) Yeah, it's a known problem. The main problem is that we are only checking to see merge both to the left and the right of the extent tree when converting an extent from uninitialzied to initialized. I've cc'ed the linux-ext4 list in the hopes someone is motivated to fix this long-standing shortcoming. Unless someone starts working quickly, it's not likely it will make this upcoming merge window, but we can hope.... - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists