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Unverified Commit 54949916 authored by Gao Xiang's avatar Gao Xiang Committed by Michael Bestas
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staging: erofs: turn cache strategies into mount options 



Kill all kconfig cache strategies and turn them into mount options
"cache_strategy={disable|readahead|readaround}".

As the first step, cached pages can still be usable after cache
is disabled by remounting, and these pages will be fallen out
over time, which can be refined in the later version if some
requirement is needed. Update related document as well.

Suggested-by: default avatarTheodore Ts'o <tytso@mit.edu>
Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Change-Id: I8753a190949a73b2864e5561a7b6d059da4e0684
Signed-off-by: default avatarGao Xiang <gaoxiang25@huawei.com>
Link: https://lore.kernel.org/r/20190731155752.210602-20-gaoxiang25@huawei.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e0450b84

drivers/staging/erofs/Documentation/filesystems/erofs.txt

+10 −0
Original line number Diff line number Diff line
@@ -65,6 +65,16 @@ fault_injection=%d Enable fault injection in all supported types with 
                       by default if CONFIG_EROFS_FS_XATTR is selected.

(no)acl                Setup POSIX Access Control List. Note: acl is enabled

                       by default if CONFIG_EROFS_FS_POSIX_ACL is selected.

cache_strategy=%s      Select a strategy for cached decompression from now on:

                         disabled: In-place I/O decompression only;

                        readahead: Cache the last incomplete compressed physical

                                   cluster for further reading. It still does

                                   in-place I/O decompression for the rest

                                   compressed physical clusters;

                       readaround: Cache the both ends of incomplete compressed

                                   physical clusters for further reading.

                                   It still does in-place I/O decompression

                                   for the rest compressed physical clusters.



Module parameters

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