I have already flashed 2.4.4.0 you have built but I can not mount /data and I see no way of initiating the decrpytion (and at no point I am asked for decryption password).
I think I have read somewhere, or it was in the #twrp irc channel, that the decryption support is not included in the build by default (anymore)... I will check again.
---------- Post added at 11:35 AM ---------- Previous post was at 11:08 AM ----------
I see in twrp source code that there are flags that have to be set (at this point I'm not sure which one exactly is appropriate for GT-P7500) for encryption to be included during the build process: TW_INCLUDE_CRYPTO and/or TW_INCLUDE_CRYPTO_SAMSUNG. Maybe you could take a look at sources in your build environment and check if the flags are set.
Just as a potentially useful information, here is the output from my (encrypted) tablet, from TeamWin's cryptsettings utility on stock ICS 4.0.4 with kernel v3.1.10:
Code:TW_INCLUDE_CRYPTO := true TW_CRYPTO_FS_TYPE := "ext4" TW_CRYPTO_REAL_BLKDEV := "/dev/block/platform/sdhci-tegra.3/by-num/p8" TW_CRYPTO_MNT_POINT := "/data" TW_CRYPTO_FS_OPTIONS := "journal_async_commit,data=writeback,nodelalloc,errors=panic" TW_CRYPTO_FS_FLAGS := "0x00000406" TW_CRYPTO_KEY_LOC := "footer"
---------- Post added at 12:17 PM ---------- Previous post was at 11:35 AM ----------
Update: I have also checked the twrp recovery.log. There is no encryption support flag set during the initialization process.
Unfortunately, that adds about 883kb of libraries which just can't be crammed in. Just tried it. Sorry. The recovery for my I9300 with exfat, twrp splash screen, su injection, and encryption is about 7MB.
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I'm looking into adding the ROW (read over write) disk i/o scheduler in.
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