On Fri, Oct 2, 2020 at 9:08 AM GitLab Bridge on behalf of bkhomuts <cki-gitlab@xxxxxxxxxx> wrote: > > From: Bohdan Khomutskyi <bkhomuts@xxxxxxxxxx> > > I discovered that several kernel configuration options related to SquashFS decompression are set sub-optimally in Fedora. But the optimal configuration is used in RHEL 8. > If we set those options to match RHEL, a performance improvement could be achieved while reading from compressed SquashFS filesystem. > > Please see my original message in Fedora kernel mailing list archive: > https://lists.fedoraproject.org/archives/list/kernel@xxxxxxxxxxxxxxxxxxxxxxx/thread/4M6WYFOZAZYIEVNZTBVM2BTT7SIEZBNQ/ > There you can find an excerpt from Linux documentation for the changed options. > > I found the disparity while working on Fedora change proposal: > https://fedoraproject.org/wiki/Changes/OptimizeSquashFS This looks good, thanks for digging into it. Acked-by: Justin Forbes <jforbes@xxxxxxxxxxxxxxxxx> > > Signed-off-by: Bohdan Khomutskyi <bkhomuts@xxxxxxxxxx> > --- > .../{ark => common}/generic/CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU | 0 > .../{ark => common}/generic/CONFIG_SQUASHFS_DECOMP_SINGLE | 0 > .../configs/{ark => common}/generic/CONFIG_SQUASHFS_FILE_CACHE | 0 > .../configs/{ark => common}/generic/CONFIG_SQUASHFS_FILE_DIRECT | 0 > .../configs/fedora/generic/CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU | 1 - > redhat/configs/fedora/generic/CONFIG_SQUASHFS_DECOMP_SINGLE | 1 - > redhat/configs/fedora/generic/CONFIG_SQUASHFS_FILE_CACHE | 1 - > redhat/configs/fedora/generic/CONFIG_SQUASHFS_FILE_DIRECT | 1 - > 8 files changed, 4 deletions(-) > rename redhat/configs/{ark => common}/generic/CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU (100%) > rename redhat/configs/{ark => common}/generic/CONFIG_SQUASHFS_DECOMP_SINGLE (100%) > rename redhat/configs/{ark => common}/generic/CONFIG_SQUASHFS_FILE_CACHE (100%) > rename redhat/configs/{ark => common}/generic/CONFIG_SQUASHFS_FILE_DIRECT (100%) > delete mode 100644 redhat/configs/fedora/generic/CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU > delete mode 100644 redhat/configs/fedora/generic/CONFIG_SQUASHFS_DECOMP_SINGLE > delete mode 100644 redhat/configs/fedora/generic/CONFIG_SQUASHFS_FILE_CACHE > delete mode 100644 redhat/configs/fedora/generic/CONFIG_SQUASHFS_FILE_DIRECT > > diff --git a/redhat/configs/ark/generic/CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU b/redhat/configs/common/generic/CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU > similarity index 100% > rename from redhat/configs/ark/generic/CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU > rename to redhat/configs/common/generic/CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU > diff --git a/redhat/configs/ark/generic/CONFIG_SQUASHFS_DECOMP_SINGLE b/redhat/configs/common/generic/CONFIG_SQUASHFS_DECOMP_SINGLE > similarity index 100% > rename from redhat/configs/ark/generic/CONFIG_SQUASHFS_DECOMP_SINGLE > rename to redhat/configs/common/generic/CONFIG_SQUASHFS_DECOMP_SINGLE > diff --git a/redhat/configs/ark/generic/CONFIG_SQUASHFS_FILE_CACHE b/redhat/configs/common/generic/CONFIG_SQUASHFS_FILE_CACHE > similarity index 100% > rename from redhat/configs/ark/generic/CONFIG_SQUASHFS_FILE_CACHE > rename to redhat/configs/common/generic/CONFIG_SQUASHFS_FILE_CACHE > diff --git a/redhat/configs/ark/generic/CONFIG_SQUASHFS_FILE_DIRECT b/redhat/configs/common/generic/CONFIG_SQUASHFS_FILE_DIRECT > similarity index 100% > rename from redhat/configs/ark/generic/CONFIG_SQUASHFS_FILE_DIRECT > rename to redhat/configs/common/generic/CONFIG_SQUASHFS_FILE_DIRECT > diff --git a/redhat/configs/fedora/generic/CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU b/redhat/configs/fedora/generic/CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU > deleted file mode 100644 > index 123cbd7db973..000000000000 > --- a/redhat/configs/fedora/generic/CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU > +++ /dev/null > @@ -1 +0,0 @@ > -# CONFIG_SQUASHFS_DECOMP_MULTI_PERCPU is not set > diff --git a/redhat/configs/fedora/generic/CONFIG_SQUASHFS_DECOMP_SINGLE b/redhat/configs/fedora/generic/CONFIG_SQUASHFS_DECOMP_SINGLE > deleted file mode 100644 > index 5978a504eaec..000000000000 > --- a/redhat/configs/fedora/generic/CONFIG_SQUASHFS_DECOMP_SINGLE > +++ /dev/null > @@ -1 +0,0 @@ > -CONFIG_SQUASHFS_DECOMP_SINGLE=y > diff --git a/redhat/configs/fedora/generic/CONFIG_SQUASHFS_FILE_CACHE b/redhat/configs/fedora/generic/CONFIG_SQUASHFS_FILE_CACHE > deleted file mode 100644 > index 15b6bd660cf8..000000000000 > --- a/redhat/configs/fedora/generic/CONFIG_SQUASHFS_FILE_CACHE > +++ /dev/null > @@ -1 +0,0 @@ > -CONFIG_SQUASHFS_FILE_CACHE=y > diff --git a/redhat/configs/fedora/generic/CONFIG_SQUASHFS_FILE_DIRECT b/redhat/configs/fedora/generic/CONFIG_SQUASHFS_FILE_DIRECT > deleted file mode 100644 > index 50eff586df28..000000000000 > --- a/redhat/configs/fedora/generic/CONFIG_SQUASHFS_FILE_DIRECT > +++ /dev/null > @@ -1 +0,0 @@ > -# CONFIG_SQUASHFS_FILE_DIRECT is not set > -- > GitLab > _______________________________________________ > kernel mailing list -- kernel@xxxxxxxxxxxxxxxxxxxxxxx > To unsubscribe send an email to kernel-leave@xxxxxxxxxxxxxxxxxxxxxxx > Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: https://lists.fedoraproject.org/archives/list/kernel@xxxxxxxxxxxxxxxxxxxxxxx _______________________________________________ kernel mailing list -- kernel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to kernel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/kernel@xxxxxxxxxxxxxxxxxxxxxxx
