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authorRichard Weinberger <richard@nod.at>2021-05-25 13:29:51 +0200
committerRichard Purdie <richard.purdie@linuxfoundation.org>2021-05-31 14:29:39 +0100
commit41dead1ff8ccc49e6cd6e6f5d41a59d164693e0d (patch)
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parent7beaae812f55a43797a459f3ad25f1be121bdbe1 (diff)
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Add support for erofs filesystems
Since Linux 5.4 a new read-only filesystem is available, erofs. Compared to squashfs it offers much better read performance with and without compression enabled. It suppports two optional compressors, lz4 and lz4hc. >From the mkfs.erofs man page: EROFS is a new enhanced lightweight linux read-only filesystem with modern designs (eg. no buffer head, reduced metadata, inline xattrs/data, etc.) for scenarios which need high-performance read-only requirements, e.g. Android OS for smartphones and LIVECDs. It also provides fixed-sized output compression support, which improves storage density, keeps relatively higher compression ratios, which is more useful to achieve high performance for embedded devices with limited memory since it has unnoticable memory overhead and page cache thrashing. This commit adds support for three new filesystem targets: erofs: erofs without compression erofs-lz4: erofs with lz4 compresssion enabled erofs-lz4hc: erofs with lz4hc compression enabled Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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