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linux-esx: Enable the 'deadline' and 'cfq' I/O schedulers
Some of my experiments have shown that the 'deadline' and 'cfq' I/O
schedulers can give better I/O performance than the 'noop' I/O
scheduler for certain workloads. However, the linux-esx kernel
currently only supports the 'noop' I/O scheduler. So enable the other
I/O schedulers in the kernel config, but retain the default as 'noop'
for now, until we do more extensive performance measurements.
Change-Id: Ia4add3c18afdd93261d4005b9904f3c4b400ea3f
Reviewed-on: http://photon-jenkins.eng.vmware.com:8082/4625
Tested-by: gerrit-photon <photon-checkins@vmware.com>
Reviewed-by: Bo Gan <ganb@vmware.com>
Srivatsa S. Bhat authored on 2018/01/11 09:12:31Showing 2 changed files
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@@ -368,8 +368,11 @@ CONFIG_BLK_MQ_PCI=y |
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# IO Schedulers |
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# |
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CONFIG_IOSCHED_NOOP=y |
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-# CONFIG_IOSCHED_DEADLINE is not set |
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-# CONFIG_IOSCHED_CFQ is not set |
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+CONFIG_IOSCHED_DEADLINE=y |
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+CONFIG_IOSCHED_CFQ=y |
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+# CONFIG_CFQ_GROUP_IOSCHED is not set |
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+# CONFIG_DEFAULT_DEADLINE is not set |
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+# CONFIG_DEFAULT_CFQ is not set |
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CONFIG_DEFAULT_NOOP=y |
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CONFIG_DEFAULT_IOSCHED="noop" |
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CONFIG_PADATA=y |
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@@ -2,7 +2,7 @@ |
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Summary: Kernel |
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Name: linux-esx |
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Version: 4.9.75 |
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-Release: 3%{?dist}
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+Release: 4%{?dist}
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License: GPLv2 |
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URL: http://www.kernel.org/ |
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Group: System Environment/Kernel |
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@@ -250,6 +250,8 @@ ln -sf linux-%{uname_r}.cfg /boot/photon.cfg
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/usr/src/linux-headers-%{uname_r}
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%changelog |
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+* Wed Jan 10 2018 Srivatsa S. Bhat <srivatsa@csail.mit.edu> 4.9.75-4 |
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+- Enable the 'deadline' and 'cfq' I/O schedulers. |
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* Sun Jan 07 2018 Bo Gan <ganb@vmware.com> 4.9.75-3 |
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- Second Spectre fix, clear user controlled registers upon syscall entry |
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* Sun Jan 07 2018 Bo Gan <ganb@vmware.com> 4.9.75-2 |