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platform_system_core
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[DO NOT MERGE] Use FUSE_SHORTCIRCUIT if available 

Use a non yet maintainer reviewed kernel patch from QCOM that greatly
improves IO speed in case it is available from the device specific
kernel headers.

Bug: 24216004
Bug: 30222859
Change-Id: I4101d80082c9ad9d042dde5c620ddb309d193d52
This commit is contained in:
Thierry Strudel 2016-01-13 15:11:35 -08:00
parent 29e7e3edb1
commit 738e0dcf0a
1 changed files with 17 additions and 0 deletions
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17
sdcard/sdcard.c
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@ -1221,7 +1221,13 @@ static int handle_open(struct fuse* fuse, struct fuse_handler* handler,
}
out.fh = ptr_to_id(h);
out.open_flags = 0;
#ifdef FUSE_SHORTCIRCUIT
out.lower_fd = h->fd;
#else
out.padding = 0;
#endif
fuse_reply(fuse, hdr->unique, &out, sizeof(out));
return NO_STATUS;
}
@ -1385,7 +1391,13 @@ static int handle_opendir(struct fuse* fuse, struct fuse_handler* handler,
}
out.fh = ptr_to_id(h);
out.open_flags = 0;
#ifdef FUSE_SHORTCIRCUIT
out.lower_fd = -1;
#else
out.padding = 0;
#endif
fuse_reply(fuse, hdr->unique, &out, sizeof(out));
return NO_STATUS;
}
@ -1467,6 +1479,11 @@ static int handle_init(struct fuse* fuse, struct fuse_handler* handler,
out.major = FUSE_KERNEL_VERSION;
out.max_readahead = req->max_readahead;
out.flags = FUSE_ATOMIC_O_TRUNC | FUSE_BIG_WRITES;
#ifdef FUSE_SHORTCIRCUIT
out.flags |= FUSE_SHORTCIRCUIT;
#endif
out.max_background = 32;
out.congestion_threshold = 32;
out.max_write = MAX_WRITE;