From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Subject: Re: Bug with --buffer_compress_percentage References: <56533A11.4050706@kernel.dk> <56533BE5.3010606@kernel.dk> <5653D5EA.1060201@kernel.dk> From: Jens Axboe Message-ID: <5655F003.1000208@kernel.dk> Date: Wed, 25 Nov 2015 10:29:39 -0700 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit To: Matthew Eaton Cc: fio@vger.kernel.org List-ID: On 11/25/2015 10:16 AM, Matthew Eaton wrote: >> Perfect, thanks for reporting and followup testing. >> >> -- >> Jens Axboe > > Unfortunately I am having an issue with buffer_compress_chunk in the > 2.2.12 release. Removing buffer_compress_chunk from the tests below > fixes the issues. > > fio --name=test --rw=write --bs=4k --ioengine=libaio --direct=1 > --iodepth=32 --size=1g --refill_buffers > --buffer_compress_percentage=50 --buffer_compress_chunk=32k > --filename=testfile > test: (g=0): rw=write, bs=4K-4K/4K-4K/4K-4K, ioengine=libaio, iodepth=32 > fio-2.2.12 > Starting 1 process > fio: pid=24516, got signal=11 > > > Run status group 0 (all jobs): > > Disk stats (read/write): > sda: ios=0/0, merge=0/0, ticks=0/0, in_queue=0, util=0.00% > fio: file hash not empty on exit > > > fio --name=test --rw=write --bs=128k --ioengine=libaio --direct=1 > --iodepth=32 --size=1g --refill_buffers > --buffer_compress_percentage=50 --buffer_compress_chunk=32k > --filename=testfile > test: (g=0): rw=write, bs=128K-128K/128K-128K/128K-128K, > ioengine=libaio, iodepth=32 > fio-2.2.12 > Starting 1 process > Segmentation fault (core dumped) That's odd, I can't reproduce that. Could this just be a bad build? Fio sometimes fails to rebuild correctly between version. Does it persist across a make clean && make? -- Jens Axboe