From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mitch Harder Subject: Re: [PATCH v2]Btrfs: pwrite blocked when writing from the mmaped buffer of the same page Date: Thu, 24 Feb 2011 10:03:07 -0600 Message-ID: References: <1291887014-18447-1-git-send-email-xin.zhong@intel.com> <201101280354.36884.johannes.hirte@fem.tu-ilmenau.de> <1865303E0DED764181A9D882DEF65FB685DF762B45@shsmsx502.ccr.corp.intel.com> <201102020034.43808.johannes.hirte@fem.tu-ilmenau.de> <1865303E0DED764181A9D882DEF65FB68621CA7167@shsmsx502.ccr.corp.intel.com> <1298028713.11103.13.camel@mainframe> <1865303E0DED764181A9D882DEF65FB686421B24FB@shsmsx502.ccr.corp.intel.com> <1298559118.11224.40.camel@mainframe> <1298563230-sup-9619@think> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Cc: =?ISO-8859-1?Q?Maria_Wikstr=F6m?= , "Zhong, Xin" , Johannes Hirte , "linux-btrfs@vger.kernel.org" To: Chris Mason Return-path: In-Reply-To: <1298563230-sup-9619@think> List-ID: On Thu, Feb 24, 2011 at 10:00 AM, Chris Mason = wrote: > Excerpts from Mitch Harder's message of 2011-02-24 10:55:15 -0500: >> 2011/2/24 Maria Wikstr=F6m : >> > m=E5n 2011-02-21 klockan 09:51 +0800 skrev Zhong, Xin: >> >> The backtrace in your attachment looks like a known bug of 2.6.37= which have already been fixed in 2.6.38. I have no idea why latest btr= fs still hang in your environment if there's no debug info... >> >> >> > >> > Haha, yes that's very hard :) >> > >> > 2.6.38-rc6 and btrfs-unstable behaves the same way. I can close th= e >> > process with ctrl+c and it disappear a few seconds later. There is= no >> > CPU usage. Reading works because I can start htop and watch "svn i= nfo" >> > disappear, but everything writing to btrfs slows down to a crawl. = It >> > takes about 1 minute to log in. So I had to put the logs on an oth= er >> > partition using ext3 to get the output from sysrq+t. >> > >> >> I believe I've been experiencing this issue also. =A0However, my pro= blem >> usually results in a "No space left on device" error rather than a >> lock-up or crash. =A0But I've bisected my issue to this patch, and m= y >> "btrfs fi show" and "btrfs fi df" looks similar to others who've >> posted to this tread with all my space being allocated, but not used= =2E >> > > Sorry, which patch did you bisect the problem down to? > The patch at the head of this thread: Btrfs: pwrite blocked when writing from the mmaped buffer of the same p= age -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" = in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html