From: Christophe Leroy <christophe.leroy@csgroup.eu> To: Qu Wenruo <quwenruo.btrfs@gmx.com>, Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>, David Sterba <dsterba@suse.com> Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>, "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>, "linux-hexagon@vger.kernel.org" <linux-hexagon@vger.kernel.org> Subject: Re: [PATCH] fs: btrfs: Disable BTRFS on platforms having 256K pages Date: Mon, 10 Jan 2022 08:29:44 +0000 [thread overview] Message-ID: <3db6dbe8-7190-a2b1-f092-22bbbac6fedd@csgroup.eu> (raw) In-Reply-To: <6c7a6762-6bec-842b-70b4-4a53297687d1@gmx.com> Hi Qu, Le 05/01/2022 à 00:32, Qu Wenruo a écrit : > Hi Christophe, > > I'm recently enhancing the subpage support for btrfs, and my current > branch should solve the problem for btrfs to support larger page sizes. > > But unfortunately my current test environment can only provide page size > with 64K or 4K, no 16K or 128K/256K support. > > Mind to test my new branch on 128K page size systems? > (256K page size support is still lacking though, which will be addressed > in the future) I don't have any system with disk, I only use flashdisks with UBIFS filesystem. The reason why I did this commit was because of a build failure reported by Kernel Build Robot, that's it. Also note that powerpc doesn't have 128K pages. Only 4/16/64/256. And for 256 it requires a special version of ld and binutils that I don't have. I have a board where I can do 16k pages, but again that board has no disk. Christophe > > https://github.com/adam900710/linux/tree/metadata_subpage_switch > > Thanks, > Qu > > On 2021/6/10 13:23, Christophe Leroy wrote: >> With a config having PAGE_SIZE set to 256K, BTRFS build fails >> with the following message >> >> include/linux/compiler_types.h:326:38: error: call to >> '__compiletime_assert_791' declared with attribute error: BUILD_BUG_ON >> failed: (BTRFS_MAX_COMPRESSED % PAGE_SIZE) != 0 >> >> BTRFS_MAX_COMPRESSED being 128K, BTRFS cannot support platforms with >> 256K pages at the time being. >> >> There are two platforms that can select 256K pages: >> - hexagon >> - powerpc >> >> Disable BTRFS when 256K page size is selected. >> >> Reported-by: kernel test robot <lkp@intel.com> >> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> >> --- >> fs/btrfs/Kconfig | 2 ++ >> 1 file changed, 2 insertions(+) >> >> diff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig >> index 68b95ad82126..520a0f6a7d9e 100644 >> --- a/fs/btrfs/Kconfig >> +++ b/fs/btrfs/Kconfig >> @@ -18,6 +18,8 @@ config BTRFS_FS >> select RAID6_PQ >> select XOR_BLOCKS >> select SRCU >> + depends on !PPC_256K_PAGES # powerpc >> + depends on !PAGE_SIZE_256KB # hexagon >> >> help >> Btrfs is a general purpose copy-on-write filesystem with extents,
WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@csgroup.eu> To: Qu Wenruo <quwenruo.btrfs@gmx.com>, Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>, David Sterba <dsterba@suse.com> Cc: "linux-hexagon@vger.kernel.org" <linux-hexagon@vger.kernel.org>, "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org> Subject: Re: [PATCH] fs: btrfs: Disable BTRFS on platforms having 256K pages Date: Mon, 10 Jan 2022 08:29:44 +0000 [thread overview] Message-ID: <3db6dbe8-7190-a2b1-f092-22bbbac6fedd@csgroup.eu> (raw) In-Reply-To: <6c7a6762-6bec-842b-70b4-4a53297687d1@gmx.com> Hi Qu, Le 05/01/2022 à 00:32, Qu Wenruo a écrit : > Hi Christophe, > > I'm recently enhancing the subpage support for btrfs, and my current > branch should solve the problem for btrfs to support larger page sizes. > > But unfortunately my current test environment can only provide page size > with 64K or 4K, no 16K or 128K/256K support. > > Mind to test my new branch on 128K page size systems? > (256K page size support is still lacking though, which will be addressed > in the future) I don't have any system with disk, I only use flashdisks with UBIFS filesystem. The reason why I did this commit was because of a build failure reported by Kernel Build Robot, that's it. Also note that powerpc doesn't have 128K pages. Only 4/16/64/256. And for 256 it requires a special version of ld and binutils that I don't have. I have a board where I can do 16k pages, but again that board has no disk. Christophe > > https://github.com/adam900710/linux/tree/metadata_subpage_switch > > Thanks, > Qu > > On 2021/6/10 13:23, Christophe Leroy wrote: >> With a config having PAGE_SIZE set to 256K, BTRFS build fails >> with the following message >> >> include/linux/compiler_types.h:326:38: error: call to >> '__compiletime_assert_791' declared with attribute error: BUILD_BUG_ON >> failed: (BTRFS_MAX_COMPRESSED % PAGE_SIZE) != 0 >> >> BTRFS_MAX_COMPRESSED being 128K, BTRFS cannot support platforms with >> 256K pages at the time being. >> >> There are two platforms that can select 256K pages: >> - hexagon >> - powerpc >> >> Disable BTRFS when 256K page size is selected. >> >> Reported-by: kernel test robot <lkp@intel.com> >> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> >> --- >> fs/btrfs/Kconfig | 2 ++ >> 1 file changed, 2 insertions(+) >> >> diff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig >> index 68b95ad82126..520a0f6a7d9e 100644 >> --- a/fs/btrfs/Kconfig >> +++ b/fs/btrfs/Kconfig >> @@ -18,6 +18,8 @@ config BTRFS_FS >> select RAID6_PQ >> select XOR_BLOCKS >> select SRCU >> + depends on !PPC_256K_PAGES # powerpc >> + depends on !PAGE_SIZE_256KB # hexagon >> >> help >> Btrfs is a general purpose copy-on-write filesystem with extents,
next prev parent reply other threads:[~2022-01-10 8:30 UTC|newest] Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-10 5:23 [PATCH] fs: btrfs: Disable BTRFS on platforms having 256K pages Christophe Leroy 2021-06-10 5:23 ` Christophe Leroy 2021-06-10 13:54 ` [PATCH] " Chris Mason 2021-06-10 13:54 ` Chris Mason 2021-06-10 14:50 ` Christophe Leroy 2021-06-10 14:50 ` Christophe Leroy 2021-06-10 16:20 ` David Sterba 2021-06-10 16:20 ` David Sterba 2021-06-11 12:58 ` Chris Mason 2021-06-11 12:58 ` Chris Mason 2021-06-11 13:21 ` David Sterba 2021-06-11 13:21 ` David Sterba 2021-06-11 16:56 ` Chris Mason 2021-06-11 16:56 ` Chris Mason 2021-06-12 14:44 ` Brian Cain 2021-06-12 14:44 ` Brian Cain 2021-06-11 12:34 ` [PATCH] fs: " David Sterba 2021-06-11 12:34 ` David Sterba 2021-06-11 13:47 ` Qu Wenruo 2021-06-11 13:47 ` Qu Wenruo 2022-01-04 23:32 ` Qu Wenruo 2022-01-04 23:32 ` Qu Wenruo 2022-01-06 16:31 ` Neal Gompa 2022-01-06 16:31 ` Neal Gompa 2022-01-07 0:13 ` Qu Wenruo 2022-01-07 0:13 ` Qu Wenruo 2022-01-07 2:45 ` Hector Martin 2022-01-07 2:45 ` Hector Martin 2022-01-07 4:55 ` Michael Ellerman 2022-01-07 4:55 ` Michael Ellerman 2022-01-07 5:21 ` Qu Wenruo 2022-01-07 5:21 ` Qu Wenruo 2022-01-10 8:29 ` Christophe Leroy [this message] 2022-01-10 8:29 ` Christophe Leroy
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